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aalyn [17]
3 years ago
10

test worth 70 points; test score of 90% write a proportion to find how many points a student needs to earn on the test to get th

e given score
Mathematics
1 answer:
GaryK [48]3 years ago
6 0
70/70 = 100%
35/70 =50%
63/70=90%
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Answer:

2x^2+13x+20 is the simplified answer

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True or False?<br><br> (9x - 8) - (x + 4) = 8x +12
NNADVOKAT [17]

Step-by-step explanation:

(9x-8)-(x+4)=8x+12

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3 years ago
Find the rectangular coordinates of the point with the polar coordinates (3, 3 divided by 2 pi ). (1 point)
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Answer:

The correct choice is (0,-3)

Step-by-step explanation:

To convert from polar coordinates to rectangular coordinates, we use the parametric equations:

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x=3(0) and y=3(-1)

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3 years ago
A random variable x follows a normal distribution with mean d and standard deviation o=2. It is known that x is less than 5 abou
Vaselesa [24]

Answer:

The mean of this distribution is approximately 3.96.

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Here's how to solve this problem using a normal distribution table.

Let z be the

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\displaystyle z = \frac{5 - \mu}{2}.

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The problem is that the normal distribution tables list only the value of P(0 \le Z \le z) for z \ge 0. To estimate  z from P(Z \le z) = 0.6985, it would be necessary to find the appropriate

Since P(Z \le z) = 0.6985 and is greater than P(Z \le 0) = 0.50, z > 0. As a result, P(Z \le z) can be written as the sum of P(Z < 0) and P(0 \le Z \le z). Besides, P(Z < 0) = P(Z \le 0) = 0.50. As a result:

\begin{aligned}&P(Z \le z)\\ &= P(Z < 0) + P(0 \le Z \le z) \\ &= 0.50 + P(0 \le Z \le z)\end{aligned}.

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\begin{aligned}&P(0 \le Z \le z) \\ &= P(Z \le z) - 0.50 \\&= 0.6985 - 0.50 \\&=0.1985 \end{aligned}.

Lookup 0.1985 on a normal distribution table. The corresponding z-score is 0.52. (In other words, P(0 \le Z \le 0.52) = 0.1985.)

Given that

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Solve the equation \displaystyle z = \frac{x - \mu}{\sigma} for the mean, \mu:

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3 years ago
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Answer:

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See attachment for prism

Required

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So, we have:

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Make x the subject

x = \frac{Volume }{ Base\ Area}

x = \frac{72.66in^3}{6\sqrt 3 in^2}

x = \frac{72.66}{6\sqrt 3}in

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