3 years ago

Let f(x) = x2 - 3x - 7. Find f(-3)

1 answer:

5 0

$f(x)=x^2-3x-7\\\\
f(-3)\\
Substitute\ x=-3\\\\
f(-3)=(-3)^2-3*(-3)-7\\
f(-3)=9+9-7=18-7=11\\\\\
Solution\ is\ f(-3)=11$

You might be interested in

Select all that apply.

Ymorist [56]

Answer:

Step-by-step explanation:

B= one question equals one minute

C= one minute equals one question

3 0

3 years ago

60 miles on 2.5 gallons?

alexdok [17]

60 miles /2.5 gallons is 24 miles / gallon

7 0

3 years ago

Betty had $70. She bought a necklace for $9 and a ring for $7. Which expression correctly shows the total money Betty has left?

Elodia [21]

70 - 9 - 7 = x 70 being the original amount

4 0

3 years ago

Read 2 more answers

What is 2x-y=6 the slope

Flura [38]

First of all, lets get y on its own side of the equation.

$-y=-2x+6\\y=2x-6\\$

This is slope intercept form, y=mx+b, where m is slope.

we can see that m=2, so the slope is 2 or $\frac{2}{1}$

5 0

3 years ago

Read 2 more answers

A cube has a side length of x feet. Which expression represents the surface area of the cube?

alexdok [17]

The answer is D)6x2 square units.

A surface area of a cube is a sum of its sides' areas. A side of the cube is a square, and there are total 6 sides of the cube. Also, an area of the side of the cube is the area of the square, which can be expressed as a², where a is the length of the side. Therefore, the surface area (SA) of the cube is:
SA = 6*a² = 6a²

If side length is x, that means that a = x units.
After replacing it in the formula, you will have:
SA = 6a² = 6x² square units

8 0

3 years ago

Read 2 more answers