2 years ago

Pls help I’ll give brainliest :)

Mathematics

1 answer:

guapka [62]2 years ago

5 0

Answer:

Look at the attachment

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Alice's book has 200 Pages. Alice has read 75% of the pages in her book. Nina has read the same number of pages the only 50% of

charle [14.2K]

Alice has read 150 pages, you would multiple 200 by .75 (75%). If Nina had read 50% of her book and she read 150, you multiple by 2, and get 300. So Nina has 300 pages in her book.

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3 years ago

Daniel dives into a swimming pool. The height of his head is represented by the function h(t) = -8t2 - 28t + 60, where t is the

8_murik_8 [283]

So, h(t) is how far is Daniel's head from the surface of the water, namely the surface itself is when the height is nill, so his head is at the surface and the height of it is just 0, thus h(t) = 0. Namely, what is "t" when h(t) is 0?

$\bf h(t)=-8t^2-28t+60\implies \stackrel{h(t)}{0}=-8t^2-28t+60
\\\\\\
0=-2t^2-7t+15\implies 2t^2+7t-15=0\implies (2t+3)(t-5)=0
\\\\\\
\begin{cases}
2t+3=0\implies 2t=-3\implies &t=-\frac{3}{2}\\\\
t-5=0\implies &\boxed{t=5}
\end{cases}$

clearly the seconds cannot be a negative unit, so is not -3/2.

6 0

2 years ago

Could I get some help? Its simplifying square roots of negative numbers.

Ainat [17]

Answer:

The square root of -100 is 10i.

Step-by-step explanation:

8 0

2 years ago

Evaluate this. <br><br> SHOW FULL WORK!!!

faust18 [17]

Hi there!

2³ [ (15 - 7) × (4 ÷ 2) ] = 8 [ 8 × 2 ] = 8 × 16 = 128

Hence,
The required answer is 128

~ Hope it helps!