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DENIUS [597]
3 years ago
6

4a-b Evaluate the expression when a=5 and b=-7

Mathematics
2 answers:
stepladder [879]3 years ago
8 0

Answer:

27

Step-by-step explanation:

So first we need to plug in 5 as the variable a and -7 as the variable b

4(5)-(-7)

Next we multiply the 4 and the 5 together to get 20

4(5) = 20   or    4 x 5 = 20

20-(-7)

Now we subtract negative 7 from 20

20-(-7) = 27

This can also be written as 20 plus 7 as a mathematical rule states: two negatives make a positive. So:

20-(-7) = 20 + 7

Both of these are equivalent in every sense of the word and give us our final answer of 27

Dovator [93]3 years ago
3 0
The answer would be 27 for your information
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