Mathematics
15.01.2020 21:12
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Solve the following system of equations express your answer as an ordered pair in

Solve the following system of equations express your answer as an ordered pair in the format of (a,b) with no spaces between the numbers of symbols?
2x+5y=16
-5x-2y=2
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ericgideon
ericgideon
5,0(61 marks)
Once we find what x and y is, that's where they intercept and we can write that as an ordered pair as (x,y) Now we need to find what y is. So let's put x into the original first equation 3x+4y=16 3(4)+4y=16 12+4y=16 ---Subtract 12 from both sides 4y=4 ---Divide both sides by 4 y=1 Alright, so our ordered pair is (4,1) 
daymakenna3
daymakenna3
4,8(84 marks)

96.89%

Step-by-step explanation:

Find the standard error:

s = σ/√n

s = 30 / √15

s = 7.75

Find the z-scores:

z = (x − μ) / s

z₁ = (225 − 240) / 7.75

z₁ = -1.94

z₂ = (260 − 240) / 7.75

z₂ = 2.58

Find the probability.

P(-1.94 < Z < 2.58) = P(Z<2.58) − P(Z<-1.94)

P(-1.94 < Z < 2.58) = 0.9951 − 0.0262

P(-1.94 < Z < 2.58) = 0.9689

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