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3 years ago

11

7a+4b-2c if a=8,b=2 and c=17

2 answers:

Volgvan3 years ago

6 0

Answer: 30

Explanation:

7a+4b-2c
First replace the variable and put in parentheses:
7(8)+4(2)-2(17)
When you see a number next to a parentheses, you multiply:
7(8)+4(2)-2(17)
56 + 8 - 34
Then you add first, and then subtract last:
55+8-34
64-34= 30
REMEMBER to use PEMDAS

cestrela7 [59]3 years ago

5 0

The answer is 30
7(8)+4(2)-2(17)=30

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2 years ago

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AnnyKZ [126]

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Step-by-step explanation:

we know that

The simple interest formula is equal to

$A=P(1+rt)$

where

A is the Final Investment Value

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step 1

Find the rate of interest

in this problem we have

$t=4\ years\\ P=\$18,000\\ A=\$21,600\\r=?$

substitute in the formula above and solve for r

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step 2

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3 years ago