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Nitella [24]
3 years ago
11

Evaluate the expression when b = -2 and c = 2. b - 8c

Mathematics
1 answer:
shtirl [24]3 years ago
3 0

Answer:

- 18

Step-by-step explanation:

For this problem, you want to replace the letters with the values they gave you so...

b - 8c into -2 - 8 (2)

1) Simplify 8 × 2 to 16.

−2 − 16

2) Simplify.

−18

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What is 4/5 x 3/4? Please help
V125BC [204]

Answer: 3/5

Step-by-step explanation:

Multiply both the numerator and the denominator together.

4/5 x 3/4 = 12/20

Then simplify.

12/20 = 3/5

3 0
3 years ago
If f(x)=1/x+2 what is f(3+h)?
Wittaler [7]
I don't know if you want the whole x+2 on the bottom or not, but I will put it on the bottom for now.
Replace x with (3+h)

f(3+h)=1/[(3+h)+2]

Now if it's supposed to be JUST x in the denominator...
Replace x with (3+h)

f(3+h)=1/(3+h)+2


Best wishes!
3 0
3 years ago
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The perimeter of a regular octagon is 24a + 48 inches.(a) write an expression for the length of any one side of the octagon. The
Lubov Fominskaja [6]

Answer:

3a+6

Step-by-step explanation:

3a+6 = 24a+48 divided by 8 (there are 8 sides in an octagon)

covert 24a +48 inches into feet

2a+4 feet = 18 feet

subtract 4 from both sides

2a = 14

divided 2 from both sides

a = 7

covert 3a+6 inches into feet

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0.25(7)+0.5

= 2.25

verify your answer

2.25 x 8 = 18

4 0
3 years ago
7th grade math I need some help
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Answer:

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Step-by-step explanation:

First we take 80% of $40.

1. $40 * 0.80 = $32

Next we take 105% of $32.

2. $32 * 1.05 = $33.60

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3 years ago
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