3 years ago

I need some help please.

Mathematics

1 answer:

Lynna [10]3 years ago

4 0

ok so the answer is the middle one I dont feel like typing all that out

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Alison had 310 rocks in her rock collection. After three months, her collection increases by 40%. How many rocks does Alison hav

satela [25.4K]

Answer:

434

Step-by-step explanation:

310 times .4 (percentage) = 124 which is how much she gained, then you add that onto the original amount to find how many she has now, which is 434

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2 years ago

Simplify your answer as much as possible

loris [4]

9514 1404 393

Answer:

-4u^2/y+(5/2)y^3u^2

Step-by-step explanation:

The applicable rules of exponents are ...

(a^b)(a^c) = a^(b+c)

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$(8y^2u^7-5y^6u^7)\div(-2y^3u^5)=\dfrac{8y^2u^7-5y^6u^7}{-2y^3u^5}\\\\=-4y^{2-3}u^{7-5}+\dfrac{5}{2}y^{6-3}u^{7-5}=\boxed{\dfrac{-4u^2}{y}+\dfrac{5}{2}y^3u^2}$

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3 years ago

Find an equation of a parabola with a vertex at the origin and directrix y = –2.5

Flauer [41]

When the vertex is at the origin and the directrix is at y = -2.5, the the parabola must be facing upwards and have a general formula of y = 4a x^2. In this case, a is equal to 2.5 that is, y = 4*2.5 x^2 equal to y = 10 x^2

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Need help, please confusing

Alex73 [517]

The square root of 3.3 is 1.81

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3 years ago

Which expression is equivalent to 4x2−(8x−4x2)+5+(4x−10)?

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As we look at the question Answer is :12x +15

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