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solmaris [256]
3 years ago
13

Solve the system of equations below y=3/2x-2 and 2x+y=-4

Mathematics
2 answers:
Dvinal [7]3 years ago
8 0
Since y=(3/2)x-2
subsitute 3/2x-2 for y in 2nd equation
2x+3/2x-2=-4
add 2 to both sides
2x+3/2x=-2
times  2 both sides
4x+3x=-4
7x=-4
divide both sides by 7
x=-4/7
sub that back
y=3/2x-2
y=3/2(-4/7)-2
y=-12/14-2
y=-6/7-2
y=-6/7-14/7
y=-20/7


(x,y)
(-4/7,-20/7)
Anettt [7]3 years ago
5 0
Rewrite the 2nd equation as 

y = -4 -2x

then substitute into the 1st equation so you get

-4 - 2x =  \frac{3}{2} x - 2

then solve for x. 

when you get the value of x, substitute it into either equation to find y

hope it helps
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Answer:

a) 0.3571

b) The p-value is 0.362007.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 1.35

Sample mean, \bar{x} = 1.4

Sample size, n = 26

Alpha, α = 0.01

Sample standard deviation, s = 0.7

First, we design the null and the alternate hypothesis

H_{0}: \mu = 1.35\text{ entrees per order}\\H_A: \mu > 1.35\text{ entrees per order}

We use One-tailed t test to perform this hypothesis.

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t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n-1}} }

Putting all the values, we have

t_{stat} = \displaystyle\frac{1.4 - 1.35}{\frac{0.7}{\sqrt{25}} } = 0.3571

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3 years ago
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Answer:

4 cm

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3 years ago
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