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4 years ago

What is the perimeter of a square with 8-inch sides

Mathematics

2 answers:

yawa3891 [41]4 years ago

5 0

The perimeter is 32 because if you add up all the sides you get 32 and 8 times 4 is 32

mixas84 [53]4 years ago

4 0

The answer woild be 32 because if you add 8+8+8+8 it = 32

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I don’t understand my homework

Nataly_w [17]

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3 years ago

Read 2 more answers

E^(8x)+e^(-x) find the interval on which f is increasing

saveliy_v [14]

Assuming ya mean
$f(x)=e^{8x}+e^{-x}$
take derivitive
remember dy/dx e^x=e^x
also the chain rule

so
$f'(x)=8e^{8x}+-1e^{-x}$
find where it equals 0
$0=8e^{8x}+-e^{-x}$
$e^{-x}=8e^{8x}$
multiply both sides by e^x
$1=8e^{9x}$
divide both sides by 8
$\frac{1}{8}=e^{9x}$
take ln of both sides
$ln(\frac{1}{8})=ln(e^{9x})$
$ln(\frac{1}{8})=9x$
divide both sides by 9
$\frac{ln(\frac{1}{8})}{9}=x$

x≈-1/5
f'(-1)<0
f'(0)>0

so it is increasing from x to infinity

the interval it is increasing on is $(\frac{ln(\frac{1}{8})}{9}, \infty)$

6 0

3 years ago

HELP! solve for p p+10/p-7=8/9

Nastasia [14]

$\frac{P+10}{P-7}$ = $\frac{8}{9}$

use the cross method solve the equation.

9P+90=8P-56
9P-8P=-56-90
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Hope this helps.

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3 years ago

JK=4x+7 and KL=3x+14 find JL

Lena [83]

Answer:

Step-by-step explanation:

4x + 7 = 3x + 14

x + 7 = 14

x = 7

4(7) + 7 + 3(7) + 14

28 + 7 + 21 + 14

35 + 35 = 70

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3 years ago

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4 years ago