3 +0.5(4a + 8) = 9 – 2a

Answer:

2/3

Step-by-step explanation:

Y varies directly as x

Y =kx

Y=6 when x = 72

First find the relationship between y and x.

i.e find the value of k

Substitute the value of x and y

6 = k *72

Make k the subject of the formula

K = 6/72

K= 1/12

:. The rlationship between x and y is

Y = 1/12x

When x is 8

Y = 1/12 * 8

Y = 8/12

Y = 2/3 and that is the answer

Hope it helped you

Answer:

The answer is : 2/3

Step-by-step explanation:

Given is that y varies directly as x.

Means as y increases or decreases, x also increases or decreases.

When y is 6 when x is 72,

So, when x = 8, we have to find y.

We can write the relation as follows:

[tex]\frac{6}{y}= \frac{72}{8}[/tex]

[tex]72y=48[/tex]

[tex]y=\frac{48}{72}[/tex] = [tex]\frac{2}{3}[/tex]

Answer:

4x^4

Hope this helps

For this case we must find an expression equivalent to:

[tex](256x^{16}) ^ {\frac {1} {4}[/tex]

By definition of power properties we have to:

[tex](a ^ n) ^ m = a ^ {n * m}[/tex]

Then, rewriting the expression:

[tex](256 ^ {\frac {1} {4}} * x ^ {\frac {16} {4}}) =[/tex]

We have by definition:

[tex]\sqrt [n] {a ^ m} = a ^ {\frac {m} {n}}[/tex]

So:

[tex]\sqrt [4] {256} * x ^ 4 =\\\sqrt [4] {4 ^ 4} * x ^ 4 =\\4x ^ 4[/tex]

ANswer:

Option B

Answer: first option.

Step-by-step explanation:

You know that the height of the smaller cylinder is 6 cm and the height of the larger cylinder is 18 cm, then you can find the volume ratio. This  is:

[tex]Volume\ ratio=(\frac{6cm}{18cm})^3\\\\Volume\ ratio=\frac{1}{27}[/tex]

Knowing that the volume of the larger cylinder is 40,635 cubic centimeters, you need to multiply it  by the volume ratio to find the volume of the smaller cylinder.

Therefore:

[tex]V_{smaller}=\frac{1}{27}(40,635\ cm^3)\\\\V_{smaller}=1,505\ cm^3[/tex]

Answer:

Step-by-step explanation:

[tex]4^x=\left(\dfrac{1}{8}\right)^{x+5}\qquad\text{use}\ a^{-1}=\dfrac{1}{a}\\\\4^x=(8^{-1})^{x+5}\\\\(2^2)^x=\bigg((2^3)^{-1}\bigg)^{x+5}\qquad\text{use}\ (a^n)^m=a^{nm}\\\\2^{2x}=2^{-3(x+5)}\iff2x=-3(x+5)\qquad\text{use the distributive property}\\\\2x=-3x-15\qquad\text{add}\ 3x\ \text{to both sides}\\\\5x=-15\qquad\text{divide both sides by 5}\\\\x=-3[/tex]

Answer:

B, -3

Step-by-step explanation:

Answer:

50

Step-by-step explanation:

Hello There!

There are 50 states in the United States

Alabama

Alaska

Arizona

Arkansas

California

Colorado

Connecticut

Delaware

Florida

Georgia

Hawaii

Idaho

Illinois Indiana

Iowa

Kansas

Kentucky

Louisiana

Maine

Maryland

Massachusetts

Michigan

Minnesota

Mississippi

Missouri

Montana Nebraska

Nevada

New Hampshire

New Jersey

New Mexico

New York

North Carolina

North Dakota

Ohio

Oklahoma

Oregon

Pennsylvania Rhode Island

South Carolina

South Dakota

Tennessee

Texas

Utah

Vermont

Virginia

Washington

West Virginia

Wisconsin

Wyoming

Answer:

option D) (x,y,z)

Step-by-step explanation:

we know that

The three-dimensional Cartesian coordinate is defined by three axes at right angles to each other, forming a three dimensional space.

The three axes are labeled x ,y and z.

The x-axis is called abscissa

The  y-axis is called ordinate

The z-axis is called applicate

therefore

A point in a three-dimensional Cartesian coordinate is represented by (x,y,z)

Answer:

B + 281d

Step-by-step explanation:

I think that's the answer the "is" is throwing me off "is" is either = or (x)

Hope my answer has helped you and if not i'm sorry.

Answer:

34,560

Step-by-step explanation:

Started of with 20 and earned 12%  each year.

12% is just 12 as a whole number

so from that 20  12x12x12=1,728

1,728x20=

34.560

Answer:

Step-by-step explanation:

Before we can determine which measure of central tendency is the best we need to determined whether data set is skewed or not.

We can determine the skewness, if we know at least the median and the mean.

The array of the above data set is,

16,18,28,29,35,36,37,38,40,41,44,66,68,72

The Median of the above array is  

\frac{37 + 38}{2} = \frac{75}{2} = 37.5  

The mean is

\frac{16 + 18 + 28 + 29 + 35 + 36 + 37 + 38 + 40 + 41 + 44 + 66 + 68 + 72}{14} = \frac{532}{14} = 38

Since the mean and the median are not the same, the distribution is skewed.

<b>For a skewed distribution, the best measure of central tendency is the median.</b>

To one decimal place, the median is;

37.5

NB: If the distribution is not skewed then it is normal. In a normal distribution the median is equal to the mean. The mode is considered the best measure of center in this case.

Step-by-step explanation:

The median of a data set is the measure of center that is the middle value when the original data values are arranged in order of increasing (or decreasing) magnitude

Answer:

B

Step-by-step explanation:

The recommended sample size n for point estimates is:

n = NX / (N + X - 1)

where N is the population size, and X is defined as:

X = Z² p (1 - p) / E²

where Z is the critical value, p is the sample proportion, and E is the margin of error.

Assume a confidence level of level of 95% and a margin of error of 5%.

α = 0.05, Z(α/2) = 1.96

E = 0.05

Of the 40 units tested, 2 had lifespans less than 26 days.  So the proportion is:

p = 2/40 = 0.05

Therefore:

X = (1.96)² (0.05) (1 - 0.05) / (0.05)²

X = 73

Given N = 2000:

n = (2000) (73) / (2000 + 73 - 1)

n = 70.45

Rounding, the recommended sample size is 70.

Answer:

B

Step-by-step explanation:

Answer:

Filling in the blanks: (rectangular prism) (cylinder) (rectangular prism)

The cylinder has the greater volume because the cylinder fits within the rectangular prism with extra space between the two figures.

A prism is a three-dimensional object.

There are triangular prism and rectangular prism.

We have,

We can see this by comparing the formulas for the volumes of the two shapes.

The volume V of a rectangular prism with length L, width W, and height H is given by:

V = L x W x H

The volume V of a cylinder with radius r and height H is given by:

V = πr²H

Now,

We are told that the length of each side of the prism base is equal to the diameter of the cylinder.

Since the diameter is twice the radius, this means that the width and length of the prism base are both equal to twice the radius of the cylinder.

So we can write:

L = 2r

W = 2r

Substituting these values into the formula for the volume of the rectangular prism, we get:

V prism = L x W x H

V prism = 2r x 2r x H

V prism = 4r²H

Substituting the radius and height of the cylinder into the formula for its volume, we get:

V cylinder = πr^2H

To compare the volumes,

We can divide the volume of the cylinder by the volume of the prism:

V cylinder / V prism = (πr²H) / (4r²H)

V cylinder / V prism = π/4

π/4 is greater than 1/1,

Thus,

The cylinder has a greater volume.

The cylinder fits within the rectangular prism with extra space between the two figures because the cylinder is inscribed within the prism, meaning that it is enclosed within the prism but does not fill it completely.

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Answer:

The value of CD is 2√5

Step-by-step explanation:

* Lets describe the figure to know its name

- ABCD is a quadrilateral

∵ BC parallel to AD

∵ BC = 6 units and AD = 8 units

- The quadrilateral which has two parallel sides not equal in length is a

 trapezoid

∴ ABCD is a trapezoid, where BC and AD are its bases

∵ BA perpendicular to AD

∴ BA is the height of the trapezoid

- The area of the trapezoid = 1/2 (base 1 + base 2) × its height

∵ The bases of the trapezoid are BC and AD

∵ BC = 6 and AD = 8

∵ Its area = 28 units²

∴ 1/2 (6 + 8) × height = 28

∴ 1/2 (14) × height = 28

∴ 7 × height = 28 ⇒ divide both sides by 7

∴ height = 4

∵ The height is BA

∴ BA = 4 unit

- To find the length of CD draw a perpendicular line from C to AD and

 meet it at E

∵ BA and CE are perpendicular to AD

∴ BA // CE

∵ BC // AD

- Perpendicular lines between parallel lines are equal in lengths

∴ BA = CE and BC = AE

∵ BA = 4 and BC = 6

∴ CE = 4 and AE = 6

∵ AD = 8 units

∵ AD = AE + ED

∴ 8 = 6 + ED ⇒ subtract 6 from both sides

∴ ED = 2 units

- In ΔCED

∵ m∠CED = 90°

∴ CD = √[(CE)² + (ED)²] ⇒ Pythagoras theorem

∵ CE = 4 and ED = 2

∴ CD = √[(4)² + (2)²] = √[16 + 4] = √20 = 2√5

* The value of CD is 2√5

Final answer:

The value of the unknown side CD in quadrilateral ABCD can be found using the area of a trapezoid formula and the Pythagorean theorem. Given the area, and the lengths of BC and AD, we calculated that CD equals 8 units.

Explanation:

The student has asked to find the value of CD in a quadrilateral ABCD, where BC is parallel to AD, BA is perpendicular to AD, the area of quadrilateral ABCD is 28 square units, BC is 6 units, and AD is 8 units.

Since BA is perpendicular to AD and BC is parallel to AD, we can determine that ABCD is a trapezoid with AB and CD as the non-parallel sides. The area of a trapezoid is given by the formula Area = ½ × (sum of parallel sides) × height. So we have:

½ × (AD + BC) × height = 28
½ × (8 + 6) × height = 28
½ × 14 × height = 28
7 × height = 28
height = 4 units

Since BA is perpendicular to AD, and given BA is the height of the trapezoid, this means that AB = 4 units. Now, because ABCD has right angles at A and B, triangles ABD and ABC are right triangles and we can use the Pythagorean theorem to calculate CD.

In triangle ABD:

Since CD is the hypotenuse of triangle ABD:

Therefore, the correct answer is CD = 8 units.

Answer:

6 miles

Step-by-step explanation:

4+2.75m=20.50

-4              -4

2.75m=16.50/2.75

m=6

Answer:

6 miles

Step-by-step explanation:

So the total charge is $20.50, what I personally did was

Subtract $4 from $20.50

You get $16.50

Now divide $16.50 by $2.75

There's your miles

Answer:

1/25

Step-by-step explanation:

The probability of guessing the first question correct is 1/5

The probability of guessing the second question correct is 1/5

Since they are independent

P(correct, correct) = P(1st correct) * P(2nd correct)

                               = 1/5 * 1/5

                               = 1/25

Answer:

y + 8 = 6(x + 1)

Step-by-step explanation:

The equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b) a point on the line

here m = 6 and (a, b) = (- 1, - 8), hence

y - (- 8) = 6(x - (- 1)), that is

y + 8 = 6(x + 1)

ANSWER

[tex]y + 8=6(x + 1)[/tex]

EXPLANATION

The point-slope form of an equation is given by the formula:

[tex]y-y_1=m(x-x_1)[/tex]

Where

[tex](x_1,y_1)[/tex]

is a point on this line and

[tex]m[/tex]

is the slope of the line.

From the question, the line has slope 6 and passes through (-1,-8).

This means that

[tex]x_1=-1[/tex]

[tex]y_1=-8[/tex]

and

[tex]m = 6[/tex]

We substitute these values into the point-slope formula to get:

[tex]y- - 8=6(x- - 1)[/tex]

We simplify to get:

[tex]y + 8=6(x + 1)[/tex]

Answer:

Step-by-step explanation:

I wonder if it is the minus that is causing the problem?

Let x = - 5

3*(-5) - 9

-15 - 9

This is a money question. If you are 15 dollars in debt and you spend another 9, where are you? (In the company of the American government. They do this all the time).

- 15 - 9 = - 24

Answer:

The answer is [4,3] Hope this helps.

Step-by-step explanation:

The solution to the both system of equations A and B are (3.875, 2.375) for system A and (4.133, 2.289) for system B.

Linear equations involve one or more expressions including variables and constants and the highest exponent of the variable is 1.

System of linear equations involve two or more linear equations.

Consider system A.

x + 3y = 11

15x − 3y = 51

Adding both equations,

16x = 62

x = 3.875

3y = 7.125

y = 2.375

Consider system B.

x + 3y = 11

15x = 62 ⇒ x = 4.133

3y = 6.867

y = 2.289

Hence the solutions are (3.875, 2.375) for system A and (4.133, 2.289) for system B.

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Answer:

$12

Step-by-step explanation:

If x is the price that George pays for a student ticket, then:

19 = ⅓ x + 15

To solve for x, first subtract 15 from both sides:

19 - 15 = ⅓ x

4 = ⅓ x

Then multiply both sides by 3:

4 × 3 = x

12 = x

Answer:

1/3x + 15 = 19

Step-by-step explanation:

Well this is a simple equation where you write it out EXCACTLY like the question says, the 1/3 is the 1/3 the price of a student ticket and add the x to represent the unknown amount (student ticket), the 15 represents the plus $15.00 which equals 19

Hope this helps,

(btw dont >EVER TRUST< the -->"TRUSTED ANSWERS"<-- because all it means is that they are expirienced NOT that the answer is right)

Answer:

y=68(1.5)^(x-1)

Step-by-step explanation:

Answer:

The function is:

[tex]y = 68 (1.5) ^ x[/tex]

Step-by-step explanation:

Note that the number of people increases by a factor of 1.5 per hour, and the initial number of people is 68.

So:

 After an hour the number of people is:

[tex]y = 68 (1.5)[/tex]

After two hours the number of people is:

[tex]y = 68 (1.5) (1.5) = 68 (1.5) ^ 2[/tex]

After x hours the number of people is:

[tex]y = 68 (1.5) ^ x[/tex]

Therefore, the exponential growth function that models the number of people y at the fair after x hours is:

[tex]y = 68 (1.5) ^ x[/tex]

Final answer:

The number closest to zero on the number line from the given options is 0.3, making the correct answer C) 0.3.

Explanation:

The question asks which number is closest to zero on the number line from the given options: A) -3/8, B) 3/4, C) 0.3, D) 0.50. To find out which is closest to zero, compare the absolute values of these numbers (since we are interested in the distance from zero, not the direction).

Absolute value of A) -3/8 is 0.375

Absolute value of B) 3/4 is 0.75

Absolute value of C) 0.3 is 0.3

Absolute value of D) 0.50 is 0.5

Comparing these values, 0.3 is the smallest absolute value, which means it is the closest to zero. Therefore, the correct answer is C) 0.3.

Answer: Slope = 3

Step-by-step explanation:

On a 2D-Plane, any two lines with the same slope and a different y-intercept will be parallel

Knowing this, any line with the same slope as our given line and a different y-intercept will be parallel to it

Therefore, any line with a slope of 3 and a y-intercept other than 5 will be parallel to y = 3x + 5

The answer you are looking for is a slope of 3.

Parallel lines have the same slope (M value in Y = MX + B), but different y-intercepts (B value in Y = MX + B) For example, y = 3x + 7 would be parallel to the line given above, since they slope is the same, but the y-intercept is different.

I hope this helps!

Answer:

y = -5 (x+2)

Step-by-step explanation:

We can use the point slope form of a line

y-y1 = m(x-x1) where (x1,y1) is the point and m is the slope

y-0 = -5(x--2)

y = -5 (x+2)

Answer:

13

Step-by-step explanation:

(3-2i)(3+2i) = 9  + 6i - 6i - 4i^2

9 - 4i^2

9 + 4 = 13

Answer:

f^-1(x) = (x+1)/5

Step-by-step explanation:

f(x)=5x-1

y = 5x-1

Exchange x and y

x = 5y-1

Solve for y

Add 1 to each side

x+1 = 5y-1+1

x+1 = 5y

Divide by 5

(x+1)/5 = 5y/5

(x+1)/5 = y

The inverse is (x+1)/5

f^-1(x) = (x+1)/5

Answer:

b.  (3, 0.5).

Step-by-step explanation:

x + 2y = 4

2x - 2y = 5

Adding the 2 equations eliminates the y:

3x = 9

x = 3

Substitute fro x in the first equation:

3 + 2y = 4

2y = 1

y = 0.5.

Option B is correct, (3, 0.5) is the solution of the  system of equations.

Two or more expressions with an Equal sign is called as Equation.

The two equations are

x+2y=4...(1)

2x-2y=5...(2)

Add equation 1 and 2

x+2y+2x-2y=4+5

3x=9

Divide both sides by 3

x=3

3+2y=4

Subtract 3 from both sides

2y=1

y=1/2

y=0.5

Hence, option B is correct, (3, 0.5) is the solution of the  system of equations.

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Answer: 60/2

Step-by-step explanation:

When you multiply 60 and 1/2 you get 30 which is the same as 60/2

ANSWER

[tex] \sqrt{60} [/tex]

EXPLANATION

The given exponentiial expression is

[tex] {60}^{ \frac{1}{2} } [/tex]

Recall that

[tex] {a}^{ \frac{1}{n} } = \sqrt[n]{a} [/tex]

A special case of this rule is when n=2.

Then,

[tex] {a}^{ \frac{1}{n} } = \sqrt{a} [/tex]

This implies that

[tex]{60}^{ \frac{1}{2} } = \sqrt{60} [/tex]

The correct answer is B.

22.7

They are opposites because they are both the same distance from 0 and are on different sides of 0 on a number line.

They are also opposites because when either of them is multiplied by -1, you get the other one.

[tex]22.7*-1=-22.7[/tex]

[tex]-22.7*-1=22.7[/tex]

Answer:

22.7 because it's the same number but different

Answer:

b C = 25m + 75

Step-by-step explanation:

The total cost for m months is the one time fee plus the cost per month times the number of months

C = fee + cost per month * m

C = 75 + 25m

Rearranging the equation

C = 25m + 75