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3 years ago

20%20-%201%29%20%2B%202x%20%5Cdiv%208%28x%20-%201%29%20" id="TexFormula1" title="1 \div 8( \sqrt{x} + 1) + 1 \div 8( \sqrt{x} - 1) + 2x \div 8(x - 1) " alt="1 \div 8( \sqrt{x} + 1) + 1 \div 8( \sqrt{x} - 1) + 2x \div 8(x - 1) " align="absmiddle" class="latex-formula">

Mathematics

1 answer:

svp [43]3 years ago

4 0

Answer:

what grade level of math is this

Step-by-step explanation:

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17. Higher Order Thinking Solve h - 156 = 34

vaieri [72.5K]

Answer: h = 190.

Step-by-step explanation: You have to use the reverse so, the opposite of subtraction is addition, so 156 + 34 = 190. 190 which is the "h" 190 - 156 = 34

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2 years ago

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2 years ago

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rhombus has sides of length 10 cm. and the angle between two adjacent sides is 76 degrees. Find the lengths of the other diagona

lisabon 2012 [21]

Let the length of one of the diagonals be 2x and the other be 2y, then
cos (76/2) = x/10
x = 10 cos 38 = 7.88 cm

sin (76/2) = y/10
y = 10 sin 38 = 6.16 cm

3 0

3 years ago

Test scores are normally distributed with a mean of 500. Convert the given score to a z-score, using the given standard deviatio

Bond [772]

Answer:

The percentage of students who scored below 620 is 93.32%.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question, we have that:

$\mu = 500, \sigma = 80$