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damaskus [11]
4 years ago
10

Evaluate the expression, if x=12, y=8, and z=3...... X+y2 + z2

Mathematics
2 answers:
Keith_Richards [23]4 years ago
7 0
85 is the answer because when u plug in the numbers u get 12+8^2+3^2 3*3=9 8*8=64 9+64+12=85
elena-14-01-66 [18.8K]4 years ago
6 0
34= 12+(8)2+(3)2
youre basically just plugging in the numbers to the letter they correspond
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If x + 2y = 8, and x - y = 5, what is the value of x?
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Answer:

x = 6

Step-by-step explanation:

<em>Let's solve y for x + 2y = 8.</em>

x + 2y = 8

2y = -x + 8

y = -\frac{1}{2}x + 4.

<em>Let's solve y for x - y = 5.</em>

x - y = 5

y = x - 5

<em>Since both equations have been solved for y, we can combine them together into one!</em>

x - 5 = -\frac{1}{2}x + 4

x + \frac{1}{2}x = 4 + 5

1.5x = 9

x = 6

Hope this helped! If not, please let me know!

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Step-by-step explanation:

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