F(x) = -3x2 – 20 Find f(-7) Evaluate the function Pls help

Mathematics

1 answer:

Mila [183]3 years ago

3 0

F(x)=-26
You substitute and evaluate

You might be interested in

Which expression can be used to find the volume of the cylinder in this composite figure?

Whitepunk [10]

Answer:

The volume of the cylinder is $112\pi\ cm^{3}$

Step-by-step explanation:

we know that

The volume of the cylinder is equal to

$V=Bh$

where

B is the area of the base

h is the height of the prism

$B=\pi r^{2}$

In this problem we have

$r=4\ cm$

$h=7\ cm$

substitute

Find the area of the base B

$B=\pi (4^{2})$

$B=16\pi\ cm^{2}$

substitute in the formula of the volume

$V=16\pi (7)$

$V=112\pi\ cm^{3}$

7 0

3 years ago

Which is another way to check the sum of 104+34+228+877?

Alex787 [66]

The answer is digit sum method.

Digit sum method is method used to check the sum of sum numbers. If the sum of all of the digits of numbers is equal to the sum of all of the digits of the total sum, then the arithmetic process was correct.

We need to check the sum of 104+34+228+877:
104 + 34 + 228 + 877 = 1243

Let's first summarize the digits of individual numbers:
104 *** 1 + 0 + 4 = 5
34 *** 3 + 4 = 7
228 *** 2 + 2 + 8 = 12 *** 1 + 2 = 3
877 *** 8 + 7 + 7 = 22 *** 2 + 2 = 4

Now, let's sum these sums:
5 + 7 + 3 + 4 = 19 *** 1 + 9 = 10 *** 1 + 0 = 1

Then, let's summarize the digits of the total sum:
1243 *** 1 + 2 + 4 + 3 = 10 *** 1 + 0 = 1

Since the sums of the digits on the both sides of equation is 1, than the arithmetic process was correct and the sum of 104 + 34 + 228 + 877 is really 1243.

7 0

4 years ago

D. 20.0 Math question no Guessing and Please show work

Vikki [24]