Which statements are true?

Select each correct answer.



a. 30x4−12x3=6x3(5x−2)
b. 4x2+10x=2x(2x+5)
c. 100x3+5=5x3(20x+1)
d. 8x3−6x=2x3(4−3x3)

The slope of the line that contains the points (1,-1) and (-2,8) is calculated using the change in y-values over the change in x-values, which results in a slope of -3.

To find the slope of the line that contains the points (1,-1) and (-2,8), we use the formula:

slope (m) = (Change in y) / (Change in x) = (y2 - y1) / (x2 - x1)

Substitute the given points into the formula:

m = (8 - (-1)) / (-2 - 1)
= (8 + 1) / (-2 - 1)
= 9 / (-3)
= -3

So, the slope of the line is -3.

Answer:

Part A = 90

Part B = 145

Step-by-step explanation:

For part A, we know that a triangle has a sum of 180 degrees. So we just add the angles we already know and then subtract them from 180. For part B, we know that angle ACB and angle ACD are supplementary angles, meaning they add up to 180 degrees. So just take 180 and subtract 35 to find the measure of angle ACD.

To find the value of x for which WXYZ must be a parallelogram, set up an equation by equating the lengths of opposite sides. Solve the equation to find the value of x.

To find the value of x for which WXYZ must be a parallelogram, we first need to understand the properties of parallelograms. One important property is that opposite sides are equal in length. Given that WZ = XY, we can set up an equation: 4x + 20 = x + 26. By solving this equation, we can find the value of x.

4x + 20 = x + 26

Subtracting x from both sides, we get:

3x + 20 = 26

Subtracting 20 from both sides, we get:

3x = 6

Dividing both sides by 3, we get:

x = 2

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Answer:

Of two numbers, The largest whole number which is a factor of both.

Step-by-step explanation:

Answer:

80cm^2/s

Step-by-step explanation:

This is a related rates problem where we are considering the rate at which the area of a square changes with respect to time.

So lets consider the area of a square:

A = s^2 (where s represents the length of one side of the square)

Related rates problem deal with functions of time so if we take the area and side length as a function of time and then differentiate implicitly we get:

[tex]\frac{dA}{dt} = 2s(\frac{ds}{dt})[/tex]

The problem states that the side of a square is increasing at a rate off 8cm/s so we can conclude that ds/dt = 8cm/s leaving us with:

[tex]\frac{dA}{dt} = 16s[/tex]

Now, to solve for s we have to consider the other value given. If the area of the square is initially 25cm^2 we can plug this into our formula for area to solve for the side length.

25 = s^2

s = +/- 5 (since side lengths are only positive we only consider +5)

s = 5

Now we can plug this back in for s:

[tex]\frac{dA}{dt} = 80[/tex]

Therefore, the rate at which the area of the square is increasing is 80cm^2 per second.

Answer:

B. [tex]x\leq 8[/tex]

Step-by-step explanation:

[tex]3(x+4)\leq 36[/tex]

[tex]3x+12\leq 36[/tex]  use distributive property to multiply 3 by (x + 4)

[tex]3x+12\leq 36\\-12\leq -12\\3x\leq 24[/tex]  subtract 12 on both sides (cancel out 12)

[tex]3x\leq 24[/tex]

[tex]\frac{3x}{3} \leq \frac{24}{3}[/tex]  divide 3 on both sides (cancel out 3)

[tex]x\leq 8[/tex]

Answer:

x > 8

Step-by-step explanation:

-2x + 12 < -4 (Given)

-2x < -16 (Subtracted 12 on both sides.)

x > 8 (Divided by -2 on both sides.)

*Note that if you multiply or divide by a negative number, the sign will flip.*

Answer:

C- 15 cars.

Step-by-step explanation:

To do this, you will need to set up an equation as follows:

8x+15=6x+45

Then you will subtract 6x from each side. Then you will have this:

2x+15=45

Then you will subtract 15 from each side, and then you will have:

2x=30

Then you will divide each side by 2 and you will get 15. Hope this helped!

Answer:n=-1

Step-by-step explanation:n=-6+5

n=-1

Answer:

n = -1

Step-by-step explanation:

Given

n - 5 = -6

Add 5 to both sides in order to isolate the unknown

n - 5 + 5 = -6 + 5

n = -1

The factored forms are [tex]\((p + 4c)(p - 4c - 1)\)[/tex] for the first expression and [tex]\(-(x - 7)(y - 7)\)[/tex] for the second expression.

Let's factor the given expressions:

1. [tex]\(p^2 - 16c^2 - p - 4c\)[/tex]:

  To factor this quadratic expression, we can use the difference of squares formula, [tex]\(a^2 - b^2 = (a + b)(a - b)\)[/tex]. In this case, [tex]\(p^2 - 16c^2\)[/tex] is a difference of squares, so we can factor it as [tex]\((p + 4c)(p - 4c)\)[/tex]. The remaining terms are [tex]\( - p - 4c\)[/tex], and thus, the factored form is [tex]\((p + 4c)(p - 4c) - (p + 4c)\)[/tex]. Factoring out the common factor of -1 from the last two terms gives us the final factored expression: [tex]\((p + 4c)(p - 4c - 1)\)[/tex].

2. [tex]\(x^2 - 7x + 7y - y^2\)[/tex]:

  This expression is a quadratic trinomial, and to factor it, we need to find two binomials whose product equals the given expression. The expression can be rewritten as [tex]\(x^2 - 7x - y^2 + 7y\)[/tex]. Now, we can group the terms as [tex]\((x^2 - 7x) - (y^2 - 7y)\)[/tex]. Factoring out \(x\) from the first group and y from the second group, we get [tex]\(x(x - 7) - y(y - 7)\)[/tex]. Now, we notice that both terms have a common factor of -1, so we can factor that out to obtain the final result: [tex]\(-(x - 7)(y - 7)\)[/tex].

The difference in length between a monarch butterfly and a bumblebee greater than the difference in length between a walking stick and grasshopper.

Solution:

Length of Monarch butterfly = [tex]3\frac{1}{2}[/tex] in

Length of Bumble bee = [tex]\frac{5}{8}[/tex] in

Difference between their lengths

                                   [tex]=3\frac{1}{2}-\frac{5}{8}[/tex]

To convert mixed fraction into improper fraction.

                                    [tex]=\frac{7}{2}-\frac{5}{8}[/tex]

To make the denominator same, multiply and divide the first term by 4.

                                    [tex]=\frac{28}{8}-\frac{5}{8}[/tex]

                                   [tex]=\frac{23}{8}[/tex]

Difference between length of Monarchy and Bumble bee is [tex]\frac{23}{8}[/tex] in.

Length of Walking stick = 4 in

Length of Grasshopper = [tex]1\frac{3}{4}[/tex] in

Difference between their lengths

                                   [tex]=4-1\frac{3}{4}[/tex]

To convert mixed fraction into improper fraction.

                                    [tex]=\frac{4}{1}-\frac{7}{4}[/tex]

To make the denominator same, multiply and divide the first term by 4.

                                    [tex]=\frac{16}{4}-\frac{7}{4}[/tex]

                                   [tex]=\frac{9}{4}[/tex]

Difference between length of Walking stick and Grasshopper is [tex]\frac{9}{4}[/tex] in.

Compare: [tex]\frac{23}{8}[/tex] and [tex]\frac{9}{4}[/tex]

To compare the fractions, make the denominator same.

So multiply and divide [tex]\frac{9}{4}[/tex] by 2, we get

[tex]\frac{23}{8}[/tex] and [tex]\frac{18}{8}[/tex]

[tex]$\frac{23}{8}>\frac{18}{8}[/tex]

Hence the difference in length between a monarch butterfly and a bumblebee greater than the difference in length between a walking stick and grasshopper.

Answer: The answer is 34 and 17

Step-by-step explanation: 34+17= 51

and 34-17=17

Factors of 12 : 1, 2, 3, 4, 6, 12

Factors of 20: 1, 2, 4, 5, 10, 20

In both lists of factors, 4 is in common. Therefore, the value of K is 4 because it can divide into both 12 and 20 without a remainder. 2 is also another possible value of K.

Answer:

4

Step-by-step explanation:

1*12=12   1*20=20

2*6=12   2*10=20

3*4=12   4*5=20

both have a similar multiple of 4, so k must be 4.

Answer:

7(60+3)

Step-by-step explanation:

The distributive property is a(b+c) = ab+ac

7 x 63 = (7x60) + (7x3) = 7(60+3)

So in distributive form it would be 7(60+3)

Answer:

7(1·9)

Hope this helps

Answer:

95.25 calories

Step-by-step explanation:

127  x 0.25 = 31.75

127 -31.75 = 95.25

The maximum number of half-day passes that the pool can sell and make exactly $1000 is 200 half-day passes.

In Mathematics and Geometry, the x-intercept of any function is the point at which the graph of a function crosses or touches the x-axis and the y-value or value of "y" is equal to zero (0).

By critically observing the graph shown in the image attached below, we can reasonably and logically deduce the following x-intercept:

x-intercept = (200, 0)

In this context, we can logically conclude that the maximum number of half-day passes that the pool can sell and make exactly $1000 is 200 half-day passes.

Complete Question:

A city pool sells full-day and half-day passes during the summer. The goal is to make $1000 each day from pool pass sales. The graph shows the number of full-day and half-day passes they need to sell to make $1000.

What is the maximum number of half-day passes the pool can sell and make exactly $1000?

A central angle has the same measure as its arc.

Answer:

(5 x + 2) (x + 2)

Step-by-step explanation:

Factor the following:

5 x^2 + 10 x + 2 x + 4

10 x + 2 x = 12 x:

5 x^2 + 12 x + 4

Factor the quadratic 5 x^2 + 12 x + 4. The coefficient of x^2 is 5 and the constant term is 4. The product of 5 and 4 is 20. The factors of 20 which sum to 12 are 2 and 10. So 5 x^2 + 12 x + 4 = 5 x^2 + 10 x + 2 x + 4 = 2 (5 x + 2) + x (5 x + 2):

2 (5 x + 2) + x (5 x + 2)

Factor 5 x + 2 from 2 (5 x + 2) + x (5 x + 2):

Answer: (5 x + 2) (x + 2)

Answer:

Emma needs one more $5 bill and 3 more $1 bills to buy the game that costs $45.

Step-by-step explanation:

10+10=20

5+5+5=15

1+1=2

20+15+2= 37

45-37=8

5+3 =8

Emma will need $8 more to buy the game

$10+$10= $20

$5+$5+$5= $15

$1+$1=$2

$20+$15+$2= $37

$45-$37= $8

The bills you can use to show how much more money Emma needs is a $5 bill and 3 $1 bills. Or you can use 8 $1 bills.

Hope this helps :)

Answer: x=-9

Step-by-step explanation:

First, we want to isolate x by subtracting ten from both sides

4x=-36

Then divide by four to get:

X=-9

Answer:-6

Step-by-step explanation:

you'd want to subtract the ten and move it under the 26, adding to make a negative 36 then divide by 4 on both sides

Answer:

r = -4/5

Step-by-step explanation:

Divide both sides by 15 so you have r

-12/15        simplify (both by 3)

-4/5

Answer:

0

Step-by-step explanation:

19z-19z=0

this is because z is always equivalent to itself, and therefore 19z is equivalent to 19z

When you subtract two numbers that are equivalent, you will always get 0

Answer:

0.0000052 kg

Step-by-step explanation:

Per one kilogram, there are one thousand grams. By dividing 0.0052 grams by 1000, we can find kilograms.

0.0052/1000 = 0.0000052 kg

(This could also be written as 5.2 x 10^-6 kg)

Hope this helps!

See the figure below for a better understanding of the problem. Since we have a 45-45-90 triangle, this is an isosceles triangle, so both the adjacent and opposite sides measure the same value, say, x. Then the hypotenuse would be:

[tex]H=\sqrt{x^2+x^2} \\ \\ H=2\sqrt{2}[/tex]

Then. the ratio of the length of the hypotenuse to the length of a side is:

[tex]\boxed{r=\frac{2\sqrt{x}}{x}}[/tex]

In a 45-45-90 triangle, the ratio of the length of the hypotenuse to the length of a side is √2:1. This means that if one of the legs (the sides opposite the 45-degree angles) has a length of "x" units, then the hypotenuse (the side opposite the 90-degree angle) will have a length of "x√2" units.

Answer:

Pound of Apples = 2$

Pound of Banana = 2.75$

Step-by-step explanation:

Data

Yesterday Christopher sold 35 pounds of apples (35A) and 34 pounds of bananas (34B) for a total revenue of $163.5 (=163.50)

Today he sold 15 pounds of apples (15A) and 17 pounds of bananas (17B) for a total revenue of $76.75. (=76.75)

Now well, we have a system of the equation

35A+34B=163.50

15A+17B=76.75

we must eliminate A or B,  As you can see 34 is twice 17, so we multiply on both sides of the equation so as not to alter it

35A+34B=163.50                35A+34B=163.50                            

15A+17B=76.75 (-2) ⇒        -30A-34B=-153.50

                                              5A-0B = 10

5A=10 ⇒ A=10/5 ⇒ A=2

and B:

35(2)+34B=163.5 ⇒ 70+34B=163.5 ⇒ 34B=163.5-70

34B=93.5 = 93.5/34

B=2.75

Let x represent the price of each pound of apples and y represent the price of each pound of bananas.

Since 35 pounds of apples and 34 pounds of bananas for a total revenue of $163.50. Hence:

35x + 34y = 163.50      (1)

Also, 15 pounds of apples and 17 pounds of bananas for a total revenue of $76.75. Hence:

15x + 17y = 76.75        (2)

Solving equations 1 and 2 simultaneously gives x = 2, y = 2.75

The price of each pound of apples is $2 while price of each pound of banana is $2.75

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Chuck Mallory deposited $179.33 in currency and $358.66 in checks at an ATM. This total transaction totaled $538.00.

The question references a deposit made at an ATM. We'll analyze this transaction with the given facts.

Let's declare two variables to solve this problem. Let C represent the Currency and Ch represent the Checks. Based on the facts, we can establish the following equations:

We can solve for C by replacing Ch in the first equation with 2C from the second equation. Doing this, we get C + 2C = $538, or 3C = $538.

By dividing both sides of the equation by 3, We get C = $179.33. He deposited $179.33 in currency.

We can then find how much in checks he deposited by substituting C=$179.33 in the second equation. Ch = 2* $179.33, so Ch = $358.66. He deposited $358.66 in checks.

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The diameter of the base of the tower is approximately 15m.

The height of the leaning tower = 56 m

The leaning tower is cylindrical in shape.

Suppose the diameter of the base of the tower is d

The volume of a cylinder with a diameter d and height h is [tex]\frac{\pi }{4} d^{2} h[/tex].

Given that the volume of the tower is about 9,891 cubic meters.

This means [tex]\frac{\pi }{4} d^{2} h=9891[/tex]

[tex]\frac{\pi }{4} d^{2} *56=9891[/tex]

[tex]d=15m[/tex]

Hence, the diameter of the base of the tower is approximately 15m.

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Answer:

the answer is 36 degrees