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3 years ago

What is -2 and 2/3 devided by 3/8 (the number/number means its a fraction)

1 answer:

6 0

$-2\frac{2}{3}\ divided\ by\ \frac{3}{8}\ \ \ \ |Convert\ -2\frac{2}{3}\ into\ improper\ fraction\\\\
-\frac{8}{3}\ \ divided\ by\ \frac{3}{8}\ \ \ \ |Multiply\ first\ fraction\ by\ inverse\ of\ the\\ second\\\\
-\frac{8}{3}*\frac{8}{3}=\boxed{-\frac{64}{9}}$

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Answer:

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Step-by-step explanation:

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2 years ago

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What is the solution of 3x + y = 9 and 3x − 5y = 15?

erma4kov [3.2K]

Answer:

Multiply the first equation by five to yield, 15x + 5y = 45. Add this equation to the second equation from the given,

15x + 5y = 45

+ 3x - 5y = 15

The answer would be 18x = 60. The value of x is 10/3. Therefore, the answer to this item is letter A.

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Step-by-step explanation:

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4 years ago

Mario collected data about some of the players on a women’s basketball team. The data is shown in the form of table, mapping, an

Mumz [18]

Answer:

1. No, because each x value can only have one y value (one-to-one relationship).

2. No, because each x value can only have one y value (one-to-one relationship).

3. Yes, because one member of the domain is assigned to one member of the range.

Step-by-step explanation:

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2 years ago

A psychology professor assigns letter grades on a test according to the following scheme. A: Top 10% scores, B: Scores below 10%

stich3 [128]

Answer:

The numerical limits for a D grade is between 57 and 64.

Step-by-step explanation:

When the distribution is normal, we use 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:

$\mu = 71.5, \sigma = 9.5$

D: Scores below the top 80% and above the bottom 7%

Between the 7th and the 100 - 80 = 20th percentile.

7th percentile:

X when Z has a pvalue of 0.07. So X when Z = -1.475.

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

$-1.475 = \frac{X - 71.5}{9.5}$

$X - 71.5 = -1.475*9.5$

$X = 57.49$

So 57

20th percentile:

X when Z has a pvalue of 0.2. So X when Z = -0.84.

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

$-0.84 = \frac{X - 71.5}{9.5}$

$X - 71.5 = -0.84*9.5$

$X = 63.52$

So 64

The numerical limits for a D grade is between 57 and 64.

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3 years ago

Y=3/4x - 4 finding slope and y-intercept showing work

andrey2020 [161]

This is written in slope intercept form, or y=mx+b, where m is slope and b is y intercept. Just look at the values that represent m and b to find the answer.

Slope: 3/4
Y intercept: -4

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3 years ago