The area of a rectangle is 4x+32. The length is 4. Find the width.

Answers

Answer 1

[tex]\bf \textit{area of a rectangle}\\\\ A=Lw~~ \begin{cases} L=length\\ w=width\\[-0.5em] \hrulefill\\ A=4x+32\\ L=4 \end{cases}\implies 4x+32=4w \\\\\\ \cfrac{4x+32}{4}=w\implies \cfrac{~~\begin{matrix} 4 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~ (x+8)}{~~\begin{matrix} 4 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~}=w\implies \boxed{x+8=w}[/tex]


Related Questions


8. What is the equation 2x + y = 9 written in slope-intercept form​

Answers

Answer:

y=-2x+9

Step-by-step explanation:

slope formula

y= mx+ b

so 2x+y=9 can be rewritten by moving 2x to the other side of the equation:

1.

y=9-2x

2. (reorder)

Y= -2x+9

there you go

Solve for d55
5. -38d -57 > -19d + 76

Answers

[tex]-38d-57>-19d+76\quad :\quad \begin{bmatrix}\mathrm{Solution:}\:&\:d<-7\:\\ \:\mathrm{Interval\:Notation:}&\:\left(-\infty \:,\:-7\right)\end{bmatrix}[/tex]

Solution:

Given inequality is:

[tex]-38d - 57 > -19d + 76[/tex]

We have to solve the inequality for "d"

From given,

[tex]-38d-57>-19d+76\\\\\mathrm{Add\:}57\mathrm{\:to\:both\:sides}\\\\-38d-57+57>-19d+76+57\\\\\mathrm{Simplify}\\\\-38d>-19d+133\\\\\mathrm{Add\:}19d\mathrm{\:to\:both\:sides}\\\\-38d+19d>-19d+133+19d\\\\[/tex]

[tex]\mathrm{Simplify}\\\\-19d>133\\\\Multiply\:both\:sides\:by\:-1\:\left(reverse\:the\:inequality\right)\\\\[/tex]

When we multiply or divide both sides of inequality by negative number, then we must flip the inequality sign

[tex]\left(-19d\right)\left(-1\right)<133\left(-1\right)\\\\\mathrm{Simplify}\\\\19d<-133\\\\\mathrm{Divide\:both\:sides\:by\:}19\\\\\frac{19d}{19}<\frac{-133}{19}\\\\\mathrm{Simplify}\\\\d<-7[/tex]

The solution set is given as:

[tex]-38d-57>-19d+76\quad :\quad \begin{bmatrix}\mathrm{Solution:}\:&\:d<-7\:\\ \:\mathrm{Interval\:Notation:}&\:\left(-\infty \:,\:-7\right)\end{bmatrix}[/tex]

simplify (-3e^-5x)^2

Answers

Answer:

25x^2 + 30e^5x + 9 e^10

Step-by-step explanation:

At a local movie theater sodas cost 4.50 and bags of popcorn cost 1.50. If Kirk buys three times as many bags as popcorn as sodas and pays a total of 36 determine how many of each item Kirk bought

Answers

Answer:

12 bags of popcorn and 4 sodas

Step-by-step explanation:

Quantity: Popcorn =3x       Sodas=x

Value: Sodas - $4.50, Popcorn - $1.50

Total Value: $36

3x(1.5)+4.5x=36

4.5x+4.5x=36

9x=36

x=4

Therefore, 12 bags of popcorn and 4 sodas

The number of sodas and popcorn Kirk bought is 4 and 12 respectively.

let

Number of sodas bought = x

Number of popcorn bought = 3x

Cost of soda = 4.50

cost of popcorn = 1.50

Total cost = 36

How to solve equation

(4.50×x) + (1.50×3x) = 36

4.50x + 4.50x = 36

9x = 36

x = 36/9

x = 4

Therefore, the number of sodas bought,x is 4 and the number of popcorn bought, 3x = 3 × 4 = 12

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Juanita saved $5 out of every $8 that she earns.If she earned $324.16,how much did Juanita save?

Answers

Juanita saved $162.08.
324.16/8 = 40.52 x 5 = 162.08

Answer: 202.60

Step-by-step explanation:

324.16/8 = 40.52

40.52*5 = 202.60

9C9=
What is the answer?

Answers

Answer:

1

Step-by-step explanation:

Using the definition

n[tex]C_{r}[/tex] = [tex]\frac{n!}{r!(n-r)!}[/tex]

where n! = n(n - 1)(n - 2) × 3 × 2 × 1, note that 0! = 1

Given

9[tex]C_{9}[/tex] = [tex]\frac{9!}{9!(9-9)!}[/tex] = [tex]\frac{9!}{9!(0!)}[/tex] = [tex]\frac{9!}{9!}[/tex] = 1

The value of 9C9 or C(9, 9) using Combination is 1.

In combinatorial notation, "9C9" represents the number of combinations of selecting 9 items from a set of 9 items without regard to their order. This can be calculated using the formula:

nCr = n! / (r!(n-r)!)

Here, n = 9 and r = 9.

So, 9C9 = 9! / (9!(9-9)!)

     = 9! / (9! × 0!)

Any number divided by 0 is undefined, so the denominator becomes 0!. However, 0! is defined as 1.

Therefore:

9C9 = 9! / (9! × 1)

     = 9! / 9!

     = 1

Hence, the value of 9C9 is 1.

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12. Kareem asks the 30 people in his physics class whether they enjoy eating lunch in the
cafeteria, and 18 of them say yes. Kareem knows there are 860 students in his high school, so
he estimates the total number of students who enjoy eating lunch in the cafeteria. How many
students are there?

Answers

Answer:

504

Step-by-step explanation:

just an estimate, 860/30 is roughly 28 so 28x18=504


Pamela earns $221 for 26 hours of work. How much does Pamera earn for
40 hours of work?

Answers

Answer:

Step-by-step explanation:

$340. I hope this helps

20 POINTS PLEASE ANSWER
Use the relationships between the angles to find the value of x

Answers

Answer:

x = 25 degrees

Step-by-step explanation:

So we know that the 4x, 2x + 10°, and x - 5° and the measures of the three interior angles of the triangle. The sum of the interior angles of a triangle is 180°.

Using this, we can conclude that the sum of 4x, 2x + 10°, and x - 5° is equal to 180°.

We can write this information as the equation:

4x + (2x + 10) + (x - 5) = 180

We can use this equation to find the value of x. To find the value of x by using the equation, we need to solve for x (put the equation into the form x = _).

Solve for x:

4x + (2x + 10) + (x - 5) = 180

4x + 2x + 10 + x - 5 = 180

Combine like terms.

7x + 5 = 180

Subtract 5 from both sides to get rid of the +5 on the left side.

7x = 180 - 5

Simplify.

7x = 175

Divide both sides by 7 to get rid of the coefficient of 7 on the left side.

x = 175 ÷ 7

Simplify.

x = 25.

x would be equal to 25°.

x = 25 degrees

I hope you find this helpful. :)

In the diagram, the measure of angle 5 is (10x -9), and the measure of angle 7 is (9x)". What is the measure of angle 6, to
the nearest degree?
What is the measure of angle 6, to the nearest degree?
81 degrees
90 degrees
99 degrees
105 degrees

Answers

Option C: 99° is the measure of angle 6

Explanation:

It is given that the measure of ∠5 is (10x-9)°

The measure of ∠7 is (9x)°

We need to determine the measure of ∠6

Since, from the diagram it is obvious that the angles 5 and 7 are vertical angles.

And, we know that the vertical angles are always equal.

Thus, we have,

              [tex]\angle 5 = \angle 7[/tex]

       [tex]10x-9=9x[/tex]

[tex]10x-9x-9=0[/tex]

           [tex]x-9=0[/tex]

                 [tex]x=9\\[/tex]

Thus, the value of x is 9.

Substituting [tex]x=9\\[/tex] in ∠5 and ∠7, we have,

[tex]\angle 5= (10x-9)^{\circ}[/tex]

    [tex]= (10(9)-9)^{\circ}[/tex]

    [tex]= (90-9)^{\circ}[/tex]

    [tex]= 81^{\circ}[/tex]

[tex]\angle 7=(9x)^{\circ}[/tex]

    [tex]=(9(9))^{\circ}[/tex]

    [tex]=81^{\circ}[/tex]

The measure of [tex]\angle 5 = 81^{\circ}[/tex] and [tex]\angle 7= 81^{\circ}[/tex]

Since, from the diagram we can see that the angles 6 and 7 are in a straight line.

And the angles in the straight line add up to 180°

Thus, we have,

[tex]\angle 6+\angle 7=180^{\circ}[/tex]

[tex]\angle 6+81^{\circ}=180^{\circ}[/tex]

         [tex]\angle 6=180^{\circ}-81^{\circ}[/tex]

         [tex]\angle 6 =99^{\circ}[/tex]

Thus, the measure of angle 6 is 99°

Therefore, Option C is the correct answer.

Answer:

C:99

Step-by-step explanation:

t is given that the measure of ∠5 is (10x-9)°

The measure of ∠7 is (9x)°

We need to determine the measure of ∠6

Since, from the diagram it is obvious that the angles 5 and 7 are vertical angles.

And, we know that the vertical angles are always equal.

Thus, we have,

\angle 5 = \angle 7∠5=∠7

10x-9=9x10x−9=9x

10x-9x-9=010x−9x−9=0

x-9=0x−9=0

\begin{lgathered}x=9\\\end{lgathered}

x=9

Thus, the value of x is 9.

Substituting \begin{lgathered}x=9\\\end{lgathered}

x=9

in ∠5 and ∠7, we have,

\angle 5= (10x-9)^{\circ}∠5=(10x−9)

= (10(9)-9)^{\circ}=(10(9)−9)

= (90-9)^{\circ}=(90−9)

= 81^{\circ}=81

\angle 7=(9x)^{\circ}∠7=(9x)

=(9(9))^{\circ}=(9(9))

=81^{\circ}=81

The measure of \angle 5 = 81^{\circ}∠5=81

and \angle 7= 81^{\circ}∠7=81

Since, from the diagram we can see that the angles 6 and 7 are in a straight line.

And the angles in the straight line add up to 180°

Thus, we have,

\angle 6+\angle 7=180^{\circ}∠6+∠7=180

\angle 6+81^{\circ}=180^{\circ}∠6+81

=180

\angle 6=180^{\circ}-81^{\circ}∠6=180

−81

\angle 6 =99^{\circ}∠6=99

Thus, the measure of angle 6 is 99°

Therefore, Option C is the correct answer.

What is the sum of -6 4/5 and 6 4/5?
A) 12 4/5
B) 29/5
C) 0
D) -12 4/5

Answers

Answer:

Option C, 0

Step-by-step explanation:

Step 1:  Create improper fractions

-6 4/5 = -6*5/5 - 4/5 = -30/5 - 4/5 = -34/5

6 4/5 = 6 * 5/5 + 4/5 = 30/5 + 4/5 = 34/5

Step 2:  Add

-34/5 + 34/5

0

Answer: Option C, 0

Answer:

Answer is C: 0

Step-by-step explanation:

70. Write the standard form of the equation of the line with
slope -2 passing through the point (-2,-4).

Answers

Answer:

y = -2x - 8

Step-by-step explanation:

Use the point slope form:  (y - y1) = m(x - x1)

(y - (-4)) = -2(x - (-2))

y + 4 = -2(x + 2)

y + 4 - 4 = -2x - 4 - 4

y = -2x - 8

Answer:  y = -2x - 8

Answer:

Step-by-step explanation:

y-y1=m(x-x1)

y+4=-2(x+2)

y+4=-2x-4

2x+y+8=0

or 2x+y=-8

Use the information given to correctly complete the sentence.
A scientist observes that a zebra ran 54 yards in 135 seconds.

The zebra ran at a rate of
feet per minute.

Answers

Answer:

72feet/min

Step-by-step explanation:

The following were obtained from the question:

Distance = 54 yards

But: 1yard = 3feets

Therefore, 54 yards = 54 x 3 = 162feets

Time = 135secs

Recall: 60secs = 1mins

Therefore, 135secs = 135/60 = 2.25mins

The rate of the Zebra = Distance /time

The rate of the Zebra = 162/2.25 = 72feet/min

The table shows the altitudes of four different cities. What is the correct way to arrange the altitudes in decreasing order?
City Altitude (feet)
Snowvale
Highbridge
Westsilver
Springmoor
ow
A. 58, 13,-35-51
B. 51, -35, 13, 58
C. -35.-51, 13,58
D. 58, 13.-51.-35
Reset
Reset
Next
Next

Answers

Answer:

A. 58, 13,-35,-51

Step-by-step explanation:

Start with the greatest positive number, 58. Then use the next greatest positive number, 13. When it comes to negative numbers, the number with the smaller absolute value is greater.

|-35| = 35

|-53| = 53

-35 has a smaller absolute value than -53, so -35 is greater than -53.

Answer: A. 58, 13,-35,-51

Answer:

A

Step-by-step explanation:

I am just smart U-U

The graph shows the tip amount that 14 different customers left, based on the their bill. A trend line has been drawn for the data. The equation for the line is: y = 0.14x + 2.5. Which BEST interprets the slope of the linear model? .


A) A $1 increase in the bill is associated with a $2.50 increase in tip amount.
B) A $2.50 increase in the bill is associated with a $1 increase in tip amount.
C) A $0.14 increase in the bill is associated with a $1 increase in tip amount.
D) A $1 increase in the bill is associated with a $0.14 increase in tip amount.

Answers

Answer:

D) A $1 increase in the bill is associated with a $0.14 increase in tip amount.

Step-by-step explanation:

Slope is 0.14

= change in tip/change in bill

When change in bill is $1, change in tip is $0.14

The correct interpretation of the slope in the equation y = 0.14x + 2.5 is: C) A $0.14 increase in the bill is associated with a $1 increase in tip amount. The slope (0.14) represents the rate of change, indicating that for each dollar increase in the bill x, the tip amount y increases by $0.14.

The linear model's equation y = 0.14x + 2.5 signifies that for each dollar increase in the bill x, the tip amount y rises by $0.14. The slope, 0.14, represents the rate of change in the tip amount concerning the bill.

This implies that a $1 increase in the bill corresponds to a $0.14 increase in the tip. Option C, "A $0.14 increase in the bill is associated with a $1 increase in tip amount," accurately captures this relationship.

The slope provides insights into the proportional change between the bill and tip, highlighting the linear association in the data.

Arithmetic number sequence definition

Answers

Answer:

An arithmetic sequence is a list of numbers with a definite pattern. If you take any number in the sequence then subtract it by the previous one, and the result is always the same or constant then it is an arithmetic sequence.

Step-by-step explanation:

Final answer:

An arithmetic number sequence is a sequence of numbers with a constant difference between consecutive terms, known as the common difference.

Explanation:

Arithmetic Number Sequence Definition

An arithmetic number sequence is a sequence of numbers in which the difference between consecutive terms is always the same. This fixed difference is often referred to as the common difference. For example, in the sequence 2, 5, 8, 11, ..., the common difference is 3, since each term is obtained by adding 3 to the previous term. The first term in an arithmetic sequence is usually denoted by a1, the common difference by d, and the n-th term can be expressed as [tex]a_{n}[/tex]= [tex]a_{1}[/tex] + (n - 1)d.

Arithmetic sequences are a fundamental topic in algebra and are utilized to solve various real-world problems. They also form a basis for understanding more complex patterns in mathematics, such as geometric sequences and series.

What can you multiply to get 64 and add to get -12

Answers

The answer would be 4. It would be 4 because 4x16=64. And 0-4x3=-12.

7. A soccer ball has a radius of 11 cm. Using * = 314, what is the approximate volume of the soccer ball in cubic
centimeters?
1520
4772
5572
3135
HELP

Answers

Answer:

5572

Step-by-step explanation:

Volume of Sphere

The shape of the ball is the same as a sphere, applying the formula for find the volume of sphere we found the answer as

Volume = 5576cm^3

Given Data

Radius r = 11cm

Applying the expression for the volume of a sphere we have

Volume of sphere = 4/3*π*r^3

Substitute our given Data into the expression we have

Volume of sphere = 4/3*3.142*11^3

Volume of sphere = 4/3*3.142*1331

Volume of sphere = 16728.008/3

Volume of sphere = 5576.00

Hence the volume of the ball is 5576cm^3

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Nicole is hosting a large bridal shower for her friend and has $332 in her budget to rent a facility. The facility she chose for the party requires an $74 deposit plus $59 per hour. If there is no damage to the facility, one-half of the deposit is refunded. If Nicole expects to get the deposit refund, for how many hours can she rent the facility for the bridal shower?

Answers

Answer:

Nicole can rent the facility for 3 Hours.

A model rocket is launched from the ground with an initial velocity of 100 feet per second. How many seconds later does the rocket hit the ground?

Enter your answer as a number rounded to the nearest tenth, such as: 42.5

Answers

Answer:

  6.3

Step-by-step explanation:

The rocket hits the ground at the same speed it left, only the velocity is downward, rather than upward. That is, the change in velocity is from +100 ft/s to -100 ft/s, a total change of 200 ft/s. The change in velocity is brought about by the acceleration due to gravity, 32 ft/s/s. The time required for the observed change in velocity is ...

  (200 ft/s)/(32 ft/s²) = 6.25 s

Rounded to tenths, it takes the rocket 6.3 seconds to hit the ground.

_____

The equation for the ballistic motion of the rocket is ...

  h(t) = -1/2·gt² +v0·t

where g is 32 ft/s² and v0 is 100 ft/s. A graph of this equation shows the rocket hits the ground at 6.25 seconds, as above.

Find all complex solutions for the following equation by hand: 1+3/x=6/x^2

Answers

Answer:

x=-4.37 or 1.37

Step-by-step explanation:

The equation whose solution is to be found is;

[tex]1 + \frac{3}{x}= \frac{6}{ {x}^{2} } [/tex]

we now multiply through by

[tex]{x}^{2} [/tex]

This implies that;

[tex]( {x}^{2})1 +({x}^{2} \times \frac{3}{x})= {x}^{2} \times \frac{6}{ {x}^{2} }[/tex]

[tex] \implies{x}^{2}+3x=6[/tex]

Subtracting - 6 from both side we obtain;

[tex] {x}^{2} + 3x - 6 = 6 - 6[/tex]

[tex] \implies{x}^{2} + 3x - 6 =0[/tex]We now obtain a quadratic equation.So, let us use quadratic formula to find the solutions.

Comparing the equation ,

[tex]{x}^{2} + 3x - 6 = 0[/tex]

to the general quadratic formula,

[tex]a {x}^{2} + bx + c = 0[/tex]

we can say that,

a=1,b=3 and c=-6

putting this in to the quadratic formula,

[tex] \implies x = \frac{ -b\pm \sqrt{{b}^{2} - 4ac} }{2a} [/tex], we obtain

[tex]x = \frac{-3\pm \sqrt{ {3}^{2} - 4(1)(-6)} }{2(1)} [/tex]

Simplifying we obtain,

[tex] x = \frac{ -3\pm \sqrt{9+24}}{2} [/tex]

[tex] \implies x = \frac{-3-\sqrt{33} }{2}or \frac{-3+\sqrt{33}}{2} [/tex]

x=-4.37 or 1.37

PLEASE HELP QUICK :(((
solve all, SHOW YOUR WORK
1. 2x + 8 = 16
2. 3a + 2 = 17
3. 3c – 4 = 14
4. 3a – 5 = 7

please answer, ill give brainliest to the correct answer

Answers

MARK BRAINLIEST PLZZZ :))))))

Answer:

1. x=4

2. a=5

3. c=6

4. a=4

Step-by-step explanation:

#1. 2x+8+16

subtract 8 from both sides

Divide both numbers by 2

x=4

#2. 3a+2=17

subtract 2 from both sides

Divide both numbers by 3

a=5

#3. 3c-4=14

add both numbers by 4

Divide both numbers by 3

c=6

#4. 3a-5=7

add both numbers by 5

divide both numbers by 3

a=4

There are 40 students playing dodge ball in a high school gym that is 100 feet long by 60 feet wide. There are 12,000 balls available in the gym to throw. What is the population density of the balls in the gym (balls per square foot)?

Answers

Answer:

I've never done this before, but if it is balls per square foot, then i can figure it out. It is 2 balls per square foot

Step-by-step explanation:

If the gym is 100 ft by 60 ft, it will be 6,000 square ft. Since there are 12,000 balls, you divide it by 6,000 (12,000/6,000), which is 2, so it would be 2 balls per square foot

The population density of the balls in the gym is calculated by dividing the total number of balls (12,000) by the gym's area (6,000 square feet), resulting in 2 balls per square foot.

The question asks for the population density of the balls in a gym that measures 100 feet in length and 60 feet in width, with a total of 12,000 balls available. First, we must calculate the total area of the gym to determine how many balls there are per square foot. The formula for the area is length × width, so the area of the gym is 100 feet × 60 feet = 6,000 square feet.

Next, to find the population density of the balls, we divide the total number of balls by the total area of the gym. Therefore, the population density is 12,000 balls ÷ 6,000 square feet = 2 balls per square foot. This calculation offers a simple way to visualize how densely the balls are distributed throughout the gym's space.

What is the value of x in sin 29° = cosx?
29 degrees
61 degrees
1 degree
151 degrees

Answers

Answer:

61 degrees

Step-by-step explanation:

We need to take the inverse cosine of both sides as follows:

cos^-1(sin(29))=cos^-1(cos(x))

61=x

Factor -8x^3-2x^2-12x-3 by grouping. What is the resulting expression?

Answers

Answer:

(-2x^2-3)(4x+1)

Step-by-step explanation:

factor out -2x^2 from the first two terms, and -3 from last two terms

-2x^2(4x+1)-3(4x+1)

now factor out (4x+1)

(-2x^2-3)(4x+1)

Answer:Answer:

(-2x^2-3)(4x+1)

Step-by-step explanation:

factor out -2x^2 from the first two terms, and -3 from last two terms

-2x^2(4x+1)-3(4x+1)

now factor out (4x+1)

(-2x^2-3)(4x+1)

Step-by-step explanation:

Simplify 1260g:5400g

Answers

Answer:

7 : 30

Step-by-step explanation:

Simplify

this can be simplified by looking for a number that is common

we can first divide by 10 as this is common

1260/10 = 126

5400/10 = 540

we now have 126 : 540

we can divide by 2 as it is also common

126/2 = 63

540/ 2 = 270

we can also divide by 9 as its also common

63/9 = 7

270/9 = 30

the simplified answer is :

7 : 30

Enter the fraction in simplest form.
8/14

Answers

Answer: 4/7

Step-by-step explanation:

What is the difference of 7 1/6−3 5/8? fractions. with common denominators

Answers

Answer: 3 13/24

Step-by-step explanation:

Turn 7 1/6 into an Improper Fraction:

43/6 - 3 5/8

Turn 3 5/8 into an Improper Fraction:

43/6 - 29/8

Subtract:

43/6 - 29/8= 85/24

Turn 85/24 into a Mixed Number (Final Step):

85/24 = 3 13/24

Answer:

3 13/24

Hope this Helps!

Final answer:

To find the difference between 7 1/6 and 3 5/8, convert each mixed number to an improper fraction with a common denominator of 24, subtract the numerators to find 85/24, which simplified to a mixed number results in 3 13/24.

Explanation:

The difference between 7 1/6 and 3 5/8 can be found by converting each mixed number to an improper fraction with a common denominator and then subtracting the two. First, convert the mixed numbers to improper fractions. So, we have 7 1/6 as 43/6 and 3 5/8 as 29/8. To find a common denominator, we can use the least common multiple (LCM) of 6 and 8, which is 24. Then we convert the fractions as follows:

43/6 becomes 172/2429/8 becomes 87/24

Now we can subtract the numerators and keep the common denominator:

172/24 - 87/24 = 85/24

To present the answer as a mixed number, we divide 85 by 24, which gives us:

3 13/24

Therefore, the difference between 7 1/6 and 3 5/8 is 3 13/24.

The library carries a total of 750 biography, mystery, fantasy, and science
fiction books. There are 3 times as many science fiction books as fantasy books, twice as many mystery books as
fantasy books, and four times as many biographies as fantasy books. Write an equation that describes the
number of each type of book in the library. How many of each genre is there in the library?

Answers

Answer: 3F+2F+4F+F=750

science fiction=225

mystery=150

biographies=300

fiction=75

Step-by-step explanation: To find the equation, read through the question and write down any important information, such as there are 2 twice as many mystery book as fiction books (2*fiction books=mystery books). Once you have all the information written down place it in an equation set equal to the total (750).

After you have found the equation, solve for the fiction books (F) by isolating the variable.  3F+2F+4F+F=750, 10F=750, F=750/10, F=75.

After that you plug 75 into the equation. Which would get you 3*75= 225 science fiction books 2*75= 150 mystery books and 4*75=300 biographies

To solve the problem, fantasy books (F) are used as the variable. The equation F + 3F + 2F + 4F = 750 is solved to find F = 75, leading to 75 fantasy books, 225 science fiction books, 150 mystery books, and 300 biographies.

The student is tasked with determining the number of books in each genre in a library, given certain ratios between the numbers of books in different genres. Let's use fantasy books (F) as our variable since all other genres are described in relation to fantasy books. According to the problem, there are three times as many science fiction books as fantasy books, twice as many mystery books as fantasy books, and four times as many biographies as fantasy books. The total number of books is 750.

The equation that represents the number of each type of book can be defined as:

F + 3F + 2F + 4F = 750

Combining like terms, we get:

10F = 750

Dividing both sides by 10, we find:

F = 75

Now that we have the number of fantasy books, we can calculate the numbers for other genres:

Science fiction books: 3 × 75 = 225

Mystery books: 2 × 75 = 150

Biographies: 4 × 75 = 300

I need help solving algebra equations to teach my kid. D-4=12.4 D=?

Answers

Answer: [tex]d=16.4[/tex]

Step-by-step explanation:

Step 1) Add 4 to both sides: [tex]d-4+4=12.4+4[/tex]

[tex]d=16.4[/tex]

Answer: D=16 please give brainliest

Step-by-step explanation:

D-4=12

first add +4 to both sides to reverse it

D=16 and to make sure its right

lets substutie for D

16-4=12

12=12

correct

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