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2 years ago

PLS HELP!!!!!!!!!!!!!

Mathematics

1 answer:

stepladder [879]2 years ago

6 0

First, multiply the top equation by 2 and bottom by -3.
60x+60y=900
-60x-75y=-1035
————————
-15y=-135
—————-
-15=-15
y=9

So the answer should be 9.

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Through:(5,0), parallel to y = -x+4

kondor19780726 [428]

If the line is parallel to y=-x+4, the line must have the same slope.

So, the slope of your line is -1.

Now we need to find the y intercept. We should use the point given.

y=mx+b

0=-1(5)+b

b=5

Equation: y=-x+5

6 0

3 years ago

I need help with #'s 1-6

nydimaria [60]

DA SAWCE BOAWSS DIOES THE DIRTY DEEDS ON HIS ONWN

7 0

3 years ago

The overhead reach distances of adult females are normally distributed with a mean of 200 cm and a standard deviation of 8.9 cm.

olga2289 [7]

$z = \dfrac{ 212.50 - 200}{8.9} = 1.4$

Looking up 1.4 in the standard normal table,

$P(z>1.4) = 1 - .9192 = 0.0808$

Answer: 8.1%

The standard deviation of the average is the standard deviation of an individual sample divided by the square root of n.

$z = \dfrac{198.70 - 200}{ 8.9/\sqrt{25} } = - .7303$

$P(z > -.7303) = 1 - P( z> .7303) = P(z < .7303) = .7674$

Answer: 76.7%

We know the data is normal so so is its sum and average. The standard deviation of the individual observations is given so the standard deviation of an average of n is easily calculated. We use t tests when we're estimating the standard deviation from the data.

4 0

2 years ago

pleaaaseeee help faassttttt i lost my calculator also my brain stopped working<img src="https://tex.z-dn.net/?f=%5Csqrt%7B25%7D%

vovangra [49]

Answer:

The $\sqrt{25}$ = 5

Step-by-step explanation:

6 0

2 years ago

Can anyone pls help find the area of these 3 pls

Lana71 [14]

Answer:

1) 28.5ft Squared

Step-by-step explanation:

1/2*b*h

10 *5.7 = 57

1/2 of 57 = 28.5

4 0

2 years ago