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natima [27]
3 years ago
13

Y=-2x+2 y = 7x +11 Solve systems by substitution

Mathematics
1 answer:
Agata [3.3K]3 years ago
5 0

Answer: (-1,4)

Step-by-step explanation:

y=-2x+2                                    y=7x+11 <----- substitute this equation for y in the            

                                                                       equation y=-2x+2

7x+11=-2x+2              Add 2x to both sides

9x+11=2                     Subtract 11 from both sides

9x=-9                         Divide both sides by 9

x=-1

y=-2(-1)+2                   Plug in x to one of the equations, I chose y=-2x+2            

y=2+2                         because it was the easiest, then solve

y=4

Solution is (-1,4)

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You conduct a simulation regarding which team spectators at a football game support. Your null hypothesis is that there are equa
Llana [10]

Answer:

As the <em>p</em>-value is too small the null hypothesis will be rejected concluding that there is a higher proportion of people supporting the home team.

Step-by-step explanation:

The hypothesis to determine which team spectators at a football game support is:

<em>H₀</em>: There are equal proportions of people supporting the home team and the visiting team, i.e. <em>p</em>₁ = <em>p</em>₂.

<em>Hₐ</em>: There is a higher proportion of people supporting the home team than the visiting team, i.e. <em>p</em>₁ > <em>p</em>₂.

A <em>z</em>-test for difference between proportions can be used to perform the test.

The test statistic is:

z=\frac{\hat p_{1}-\hat p_{2}}{\sqrt{P(1-P)\frac{1}{n_{1}}+\frac{1}{n_{2}}}}}

Th decision rule is:

If the <em>p</em>-value of the test is less than the significance level <em>α </em>then the null hypothesis will be rejected and vice-versa.

The commonly used significance levels are 0.01, 0.05 and 0.10.

The <em>p</em>-value of the test is computed as, <em>p</em> = 0.002.

The <em>p</em>-value of the test is less than all the significance level.

Thus, the null hypothesis will be rejected at any of the three significance level.

Conclusion:

As the <em>p</em>-value is too small the null hypothesis will be rejected concluding that there is a higher proportion of people supporting the home team.

7 0
4 years ago
Anthony has t tickets. Charlie has 2 less than triple the number of tickets that Anthony has. In terms of t, how many tickets do
swat32

Answer:

3t-2

Step-by-step explanation:

if anthony has t tickets multiply that by 3 with 3t and subtract 2

4 0
4 years ago
Complete the point-slope equation of the line through (3,-8) (6,-4)
Ganezh [65]

Answer:

y + 4 = 4/3(x - 6).

Step-by-step explanation:

The point-slope formula is shown below. We just need to find the slope.

(-4 - (-8)) / (6 - 3) = (-4 + 8) / 3 = 4 / 3

m = 4/3, y1 = -4, and x1 = 6.

y - (-4) = 4/3(x - 6)

y + 4 = 4/3(x - 6).

Hope this helps!

3 0
4 years ago
What is a possible equation for a function with an x-intercept of (-5,0) and a y-intercept of (0,3)?
Feliz [49]

Answer:

The equation of a straight line is

-3 x+5 y=15

Step-by-step explanation:

Given x - intercept of (-5,0) and y- intercept is (0,3)

here (-5,0 ) point lie on x- axis and (0,3) this point lie on y- axis

we know that the x- intercept  'a' and y- intercept 'b'  formula is

\frac{x}{a} +\frac{y}{b} = 1

so given x - intercept a =-5 and y- intercept is b= 3

now the straight line equation is \frac{x}{-5} +\frac{y}{3} =1

now simplify \frac{-3 x+5 y}{15} =1

-3 x+5 y=15

5 0
3 years ago
78% of 3 feet is how much inches
Ugo [173]
78% of 3 feet is 28.08 inches
7 0
4 years ago
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