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Vlad [161]
3 years ago
13

This is for algebra 1

Mathematics
1 answer:
allsm [11]3 years ago
3 0
X+y=12 -- 1
3x+2y=29 -- 2

(1)x2
2x+2y=24 -- 1
(2)-(1)
x=5

Sub x into 1
x+y=12
5+y=12
y=7

Her two numbers are 5 and 7
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A treatment is administered to a sample of n = 9 individuals selected from a population with a mean of µ = 80 and a standard dev
stepan [7]

Answer:

a) M =82

Step-by-step explanation:

Let´s study this as a Normal distribution.

As we know in a normal distribution the z score is = (X-μ)/(sd/sqrt(n))

where

X = mean for the taken sample = What we want to know in this problem

μ = Total population mean =80

sd= standard deviation= 12

n = sample size=9

So in this case z=( X-80)/(12/sqr(9))= (X-80)/4

also we know that the effect size taken by the machine is 0.5, which is the same as the z-score

so...

0.5 = (X-80)/4 => 0.5*4 = X-80

2+80 = X

X = 82

4 0
3 years ago
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Scorpion4ik [409]
The answer would be 1.40. The 3 significant figure are 1.39 and it wants us to round so we look at the 8 in 1.3981 and since 8 > 5 we know to round up.
4 0
3 years ago
|x+3| , if x>5. PLEASE INCLUDE EXPLANATION!!!!!
Natali5045456 [20]

Answer:

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Step-by-step explanation:


6 0
3 years ago
Solve for x. 39=3x simplify has much has you can
Sunny_sXe [5.5K]

Answer:

x=13

Step-by-step explanation:

Divide both sides by three to get rid of the three this makes x=13

6 0
3 years ago
Read 2 more answers
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