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mojhsa [17]
2 years ago
12

Please help me on this!!

Mathematics
1 answer:
Serggg [28]2 years ago
7 0
The answer Is A I did this before
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Maurinko [17]
Are you saying 9×10 that is 90
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3 years ago
0=9x-9x<br> no solution,<br> one solution,<br> infinite solutions
attashe74 [19]

Answer:

0 = 9x - 9x

0 = 0

This means it has infinite number of solutions.

Step-by-step explanation:

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3 years ago
K(a)= 4a-4, Find k(-9)
FromTheMoon [43]

We simply replace a with -9

k(-9) = 4 * -9 - 4

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5 0
3 years ago
HELP ASAP//BRAINLEST+THANKS: Subj:gravity formula stuff
Y_Kistochka [10]

Answer:

6.46

Step-by-step explanation:

h(t) = (1/2)att^{2} + v0t + h0

Origin is at surface of water (h = 0), up is positive.

a = -g = -9.8 m/s^{2}

v0 = 25 m/s

h0 = 50 m

h(t) = -4.9t2 + 25t + 50

Find t when

7 = -4.9t^{2} + 25t + 50

4.9t^{2} - 25t - 43 = 0

t = [1/(2*4.9)] [25 ±√(25^{2} + 4*4.9*43)]

t = (0.102)(25 ± 38.312)

t > 0 ⇒ use only the positive square root

t = (0.102)(25 + 38.312) ≅ 6.46 s

It is 7m above the water at about 6.46 s

7 0
3 years ago
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