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Margaret [11]
2 years ago
7

7 + 7x - (2x) + 3 if x = -4

Mathematics
2 answers:
frutty [35]2 years ago
4 0

Answer:

-10

Step-by-step explanation:

7 + 7(-4) - (2(-4)) + 3

7 - 28 - (-8)+3

7 - 28 +8 +3

= -10

Mekhanik [1.2K]2 years ago
4 0

Answer:

  • - 10

Step-by-step explanation:

  • 7 + 7x - (2x) + 3 =
  • 7 + 7x - 2x + 3 =
  • 10 + 5x =
  • 10 + 5*(- 4) =                     Substitute x = - 4
  • 10 - 20 =
  • - 10
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Which statement best describes the function below?
marta [7]
<h2>Answer:</h2>

A. It is a many-to-one function.

<h2>Step-by-step explanation:</h2>

Hello! It will be a pleasure to help to figure out what's the correct answer to this problem. First of all, we have the following function:

f(x) = 2x^3 + 2x^2-x

When plotting this function, we get the red graph of the function shown below. So let's solve this as follows:

<h3>A. It is a many-to-one function.</h3>

True

A function is said to be many-to-one there are values of the dependent variable (y-values) that corresponds to more than one value of the independent variable (x-values). To test this, we need to use the Horizontal Line Test. So let's take the horizontal line y=0.5, and you can see from the first figure below that y=0.5 is mapped onto x=-1.241 \ x=-0.344 \ and \ x=0.585. so this is a many-to-one function.

<h3>B. It is a one-to-one function.</h3><h3>False</h3>

Since this is a many-to-one function, it can't be a one-to-one function.

<h3>C. It is not a function.</h3>

False

Indeed, this is a function

<h3>D. It fails the vertical line test.​</h3>

False

It passes the vertical line test because any vertical line can intersect the graph of the function at most once. An example of this is shown in the second figure below.

6 0
3 years ago
The ratio of dogs to cats at a local animal shelter is 13/25. Which statement must be true?
Alinara [238K]

\bf \cfrac{dogs}{cats}\qquad \stackrel{ratio}{\cfrac{13}{25}}\qquad \cfrac{\leftarrow \textit{for every 13 dogs}}{\leftarrow \textit{there are 25 cats}}

4 0
3 years ago
Read 2 more answers
Gustavo noticed that when a pair of parallel lines was cut by a transversal, a certain pair of adjacent angles formed a straight
WINSTONCH [101]

Answer:

false

Step-by-step explanation:

4 0
3 years ago
Multiply.<br> (3b-5) (7b+1)<br> Simplify your answer.
mylen [45]
<h3>Answer:</h3>

It would be 21b² -32b -5

<h3>Step-by-step explanation:</h3>

By using the FOIL method, you can simplify the equation.

<em>The Foil Method is </em><u><em>ac + ad + bc +bd</em></u><em>, or </em><u><em>First, Outer, Inner, Last.</em></u>

First, you multiply the first term in each bracket.

3b * 7b = 21b²

Next, you multiply the outer term in each bracket.

3b * 1 = 3b

Then, you multiply the inner term in each bracket.

-5 * 7b = -35b

After that, you multiply the last term in each bracket.

-5 * 1 = -5

Lastly, you combine like terms.

21b² + 3b -35b -5 ---> 21b² -32b -5

<em>21b² -32b -5 would be your answer, since you cannot simplify the equation anymore.</em>

7 0
3 years ago
Factor -8m^3n^3+2m^5+2m^3
Arada [10]

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2

m

3

.

−

2

m

3

(

4

n

3

−

m

2

−

1

)

7 0
2 years ago
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