Answer:
The value for x is 2
Step-by-step explanation:
3x+1=7
3x=6
x=2
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<span>2y = x + 3 then x = 2y - 3
5y = x - 7 then x = 5y + 7
so
</span>2y - 3 = 5y + 7
2y - 5y = 7 + 3
-3y = 10
y = -10/3
y = -3 1/3
<span>2y = x + 3
</span>2 (-10/3) = x + 3
-20/3 - 3 =x
-29/3 = x
-9 2/3 =x
or
x = -9 2/3
solutions: x = -9 2/3 and y = -3 1/3
Answer:
D. 39
Step-by-step explanation:
BC^2 = BA^2 + AC^2
BC^2 = 15^2 + 36^2
BC = square root (1521)
BC = 39