If we add the equations it looks like
-5y + 8x + 5y + 2x = -18+58
so 10x=40
so x=40/10=4
now let's replace x by 4 in the second equation
5y +2*4=58
5y=58-2*4=58-8=50
so y=50/5=10
so (x, y) = (2, 10)
Answer:
h=2.69 m
Step-by-step explanation:
Ep=m×g×h
1=0.038×9.8×h
1/0.038×9.8=h
1/0.3724=h
2.69=h
X² + 5x - 14 = 0
(x-2)(x+7) = 0
x - 2 = 0
x + 7 = 0
x = 2
x = -7
Your answer is B.
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Next question.
2x² - 4x - 6 = 0
a = 2
b = -4
c = -6
And is D.
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Next question
If the discriminant is positive, then there will be 2 solutions.
Your answer is C.
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Next question
Plugging in the equation into the quadratic formula should get you answer choice A.
