3 years ago

What is the answer to this question ?

Mathematics

1 answer:

STALIN [3.7K]3 years ago

4 0

A is not commutative with the above expression
your answer is A

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What is 5+2? Ive been totally stuck on this for the longest time. I really need help

eduard

that's a tricky one!

but it is 7 i believe

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3 years ago

Anyone know how to do it

Morgarella [4.7K]

Answer:

Surface area of cube = 6x²

surface area of cube = surface area of sphere

it means that 6x²=4πr²

x²=

$\frac{4\pi {r}^{2} }{6} = \frac{4 \pi9}{6} = \frac{4\pi3}{2} = 6\pi$

$x = \sqrt{6\pi}$

$\sqrt{6\pi} = \sqrt{k\pi}$

$6\pi = \pi \: k$

$k = 6$

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2 years ago

If y varies directly as x, and y=8 when x=3, find y when x=15.

Crank

Answer:

y=40

Step-by-step explanation:

The formula for Direct Variation is y=kx or k=y/x. In this case I would use k=y/x. If you're y is 8 and x is 3, this means that K=8/3. Using this, we know that X=15. We have to find a Y value so that the fraction with an x of 15 simplified is 8/3. To do this you would write 8/3 and y/15. Now cross multiply to get 3y=120. Divide by 3 to get y=40. View my attachment for the work!

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4 years ago

The height of a rocket, launched from the ground, is given by the function y = 30t - 5t^2, where y is in meters and t is in seco

Alex17521 [72]

Answer:Rocket Launch A toy rocket is launched straight up in the air from level ground. The distance (in ft) the rocket is above the ground (the position function) is <em>f (t) = 170t -16t2 at any time t (in sec) . Find </em>

Step-by-step explanation:

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3 years ago

Giải phương trình y'=0 biết:y=x^4

Mila [183]

Answer:

Step-by-step explanation:

1) y'=(x⁴)'=4x³;

2) ∡ y'=0, ⇒ 4x³=0; ⇒ x=0.

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3 years ago