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Kisachek [45]
3 years ago
7

Evolution the expression when a=–3 and x=3 5a–x

Mathematics
2 answers:
Dafna11 [192]3 years ago
5 0

It's a good idea to get into the habit of using <u>parentheses</u> when substituting numbers in for variables.

Since <em>a = -3</em> and <em>x = 3</em>, 5a - x is 5(-3) - (3).

5(-3) is -15 and we have (-15) - 3 which simplifies to -18.

Juliette [100K]3 years ago
5 0

Answer:

-18

Step-by-step explanation:

<u>Step 1:  Substitute -3 for a and 3 for x</u>

5a - x

5(-3) - (3)

-15 - 3

<em>-18</em>

<em />

Answer:  -18

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weqwewe [10]
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[Question 1]
let d = number of dramas Gina rented, c = # of comedies, and t = # of documentaries:

[equation a] d + c + t = 11
[equation b] 2d + 3c + 2t = 27
[equation c] d + 2c + 2t = 19

if we subtract [a] from [c] we get:
[equation d] c + t = 8

if we subtract [c]*2 from [b] we get:
[equation e] -c - 2t = -11 or
[equation e] c + 2t = 11

Now we can subtract [e] from [d] to solve for t:
t = 3

Now put in 3 for t in [d] or [e] to solve for c:
c + 2(3) = 11
c + 6 = 11
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