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HACTEHA [7]
3 years ago
9

What is -7x-3 (9-7x) if x=-1

Mathematics
1 answer:
olga2289 [7]3 years ago
3 0
The correct answer is -20
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A vertical line contains the points 3,2 and 3,6 use these points and the formula for slope to explain why a vertical lines slope
Dahasolnce [82]

Answer:

see explanation

Step-by-step explanation:

Calculate the slope m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (3, 2) and (x₂, y₂ ) = (3, 6)

m = \frac{6-2}{3-3} = \frac{4}{0}

Since division by zero is undefined then the slope of the vertical line is undefined.

4 0
3 years ago
Which of the following inequalities matches the graph? (1 point)
Aleksandr [31]

Answer: 2x + y < 7

Step-by-step explanation:

In the graph we can see that:

The line is a dashed line, and the shaded area is below the dashed line, then we will have something like:

y < a*x + b

We also can see that the slope of the line is negative, and that the y-intercept is +7

Then the inequality will be something like:

y < a*x + 7

Now we can see that the line passes through the points (0, 7) and (3, 1)

Then the slope will be:

a = (1 - 7)/(3 - 0) = -6/3 = -2

that is negative, as we already said.

Then we have:

y < -2*x + 7

we can rewrite this as:

2x + y < 7

This is the first solution shown.

7 0
2 years ago
Which diagram best shows how fraction bars can be used to evaluate 1/2 divided by 1/4?
Helga [31]

Answer:

the second one

Step-by-step explanation:

2 halves make a whole. 1/2 + 1/2

4 fourths make a whole. 1/4 + 1/4 + 1/4 + 1/4

a half of a fourth is an eighth. 1/4 ÷ 1/2 = 1/8

3 0
3 years ago
HELPPPP, I can’t figure it out
Furkat [3]

Answer:

The red robins score was higher.

Step-by-step explanation:

This is because, their score was in the postives and the aliens were in the negatives

8 0
3 years ago
Read 2 more answers
1. Find the derivative of f(x), at x = 10<br> f(x) = - 5x² + 13x
Serhud [2]

Answer:

-10x+13

Step-by-step explanation:

Im not 100% sure but i tried!

6 0
3 years ago
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