1. Find the VALUE of 7x + 3y, when x = 12 and y = -6.

Mathematics

2 answers:

denis23 [38]3 years ago

8 0

Answer:

1.7(12) + 3(-6) = 84 - 18 = 66

slavikrds [6]3 years ago

3 0

Answer:
1. 66
2. 3.87 x 10^-5
3. 81.67
4. 7y - 19

Explanation:

7(12) + 3(-6)
= 84 - 18
= 66

2. 0.0000387 = 3.87 x 10^-5

3.
Area = 3.14 x (5.1)^2
= 81.67cm^2

4.
6(2y - 3) - 5(y + 1)
= 12y - 18 - 5y - 1
= 7y - 19

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