All categories

2 years ago

I need help with this

Mathematics

1 answer:

balandron [24]2 years ago

6 0

Here you go! Hope this helps

You might be interested in

I would like to know the answer for this question

g100num [7]

To put words into equations:
x+y+z =50
x=4y
4y=5z -> z= 4/5 y

Which means
4y+y+ 4/5 y= 50
29/5 y =50
29y=250
Y=29/250

3 0

3 years ago

3x+2y=4 8x-3y=-6 solving systems of equations by substitution

Over [174]

Answer:

x=0, y=2. (0, 2).

Step-by-step explanation:

3x+2y=4

8x-3y=-6

---------------

3(3x+2y)=3(4)

2(8x-3y)=2(-6)

-----------------------

9x+6y=12

16x-6y=-12

----------------

25x=0

x=0/25

x=0

3(0)+2y=4

0+2y=4

2y=4-0

2y=4

y=4/2

y=2

6 0

2 years ago

Please need help on this one

tekilochka [14]

On which one do you need help with?

4 0

3 years ago

Find the solution of the system of equations. 7x -- 8y = -23 7x – 7y = -14 (?,?)

gtnhenbr [62]

Answer:

(7,9)

Step-by-step explanation:

6 0

2 years ago

Assume that the heights of men are normally distributed with a mean of 69.0 inches and a standard deviation of 2.8 inches. If th

ioda

Answer:

The bottom cutoff heights to be eligible for this experiment is 66.1 inches.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be 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.

Mean of 69.0 inches and a standard deviation of 2.8 inches.

This means that $\mu = 69, \sigma = 2.8$