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3 years ago

−(4.8−1.92)−((−5.4)+8.04)−1.92 please show work

Mathematics

1 answer:

S_A_V [24]3 years ago

6 0

ans:-7.54

do u understand

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Step-by-step explanation:

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2 years ago

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2 years ago

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Any one know how to find the roots of an equation?

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So what you do is
make into ax^2+bx+c=0 form

add-9/2 to both sides
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now we use the quadratice formula which is
x= $\frac{-b+/- \sqrt{b^{2}-4ac} }{2a}$

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x= $\frac{2+/- \sqrt{4-(36/2)} }{2}$
x= $\frac{2+/- \sqrt{4-(18)} }{2}$
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x= $\frac{2+/- \sqrt{-14} }{2}$
x= $1+/- \frac{\sqrt{-14} }{2}$
x= $1+/- \frac{\sqrt{14} \sqrt{-1}}{2}$
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2 years ago

X and y vary inversely and x=50 when y=5 find y when x=10. what is k?

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3 years ago

A firecracker shoots up from a hill 160 feet high, with an initial speed of 90 feet per second. Using the formula H(t) = −16t2 +

Masja [62]

When the firecracker hits the ground, H(t) = 0.0 = -16t^2 + 90t + 160 Using the quadratic formula,t = (-90 +- sqrt(90^2 - 4(-16)(160))) / 2(-16)t = -1.42 ort = 7.04

The negative time is extraneous. Therefore,t = 7.04 s.

Seven Seconds is your answer!

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2 years ago

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