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mihalych1998 [28]
3 years ago
14

A sum of money is shared between Joan and sam in the ratio of 3:7. If Joan gets $40 dollars less than sam , what was the sum of

money shared?
Mathematics
2 answers:
Sergio [31]3 years ago
6 0

Answer:

The sum of money shared is 280 dollars

Step-by-step explanation:

ope it helped

Trava [24]3 years ago
5 0
40(7) therefore it is $280
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Solve and graph: -x+8<6
d1i1m1o1n [39]

Answer:

Following given solution will help you!

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3 years ago
Assume that adults have IQ scores that are normally distributed with a mean of 96 and a standard deviation of 15.7. Find the pro
astraxan [27]

Answer:

4.05% probability that a randomly selected adult has an IQ greater than 123.4.

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 = 96, \sigma = 15.7

Probability that a randomly selected adult has an IQ greater than 123.4.

This is 1 subtracted by the pvalue of Z when X = 123.4. So

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

Z = \frac{123.4 - 96}{15.7}

Z = 1.745

Z = 1.745 has a pvalue of 0.9595

1 - 0.9595 = 0.0405

4.05% probability that a randomly selected adult has an IQ greater than 123.4.

7 0
2 years ago
PLZ ANSWER ASAP!! THANK YOU ​
evablogger [386]

Answer:

5 1/4

Step-by-step explanation:

cause if you multiply those numbers you should get the answer

Glad i can help!!!

8 0
2 years ago
Read 2 more answers
What is the volume of this triangular pyramid?
Vaselesa [24]

Answer:

1560 cubic inches

Step-by-step explanation:

18x20= 360

360x13= 4680

4680/3=1560

8 0
3 years ago
Plsss help me I don’t understand!!
inna [77]

Answer:

11

Step-by-step explanation:

in the "score" section all you do is add all them up. And because there is a negative for ALL the numbers, all you do is add a negative after you add all the SCORES

6 0
3 years ago
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