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2 years ago

Y=9x+7,y=3x-11 i need to solve theeqayions by substition and show the work

Mathematics

1 answer:

djyliett [7]2 years ago

4 0

Times the second equation by 2 to get y=9x-33 and then subtract

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Fill in the blanks using the following choices: reject, fail to reject, sufficient, enough, not sufficient, not enough If the p

Nat2105 [25]

Answer:

FAIL TO REJECT

NOT ENOUGH

Step-by-step explanation:

Given a Pvalue of 0.32

Decision region :

When Pvalue < α ; Reject the Null and conclude that there is significant or enough evidence to accept the alternative hypothesis.

Otherwise, fail to reject reject the null and conclude that, there is not enough evidence to accept the alternative hypothesis

Therefore, for the scenario above, where Pvalue = 0.32

Possible α values are ; 0.1, 0.05, 0.01

For all α - values listed, the Pvalue is greater than α

Pvalue > α ; Hence, FAIL TO REJECT the Null.

Conclusion :

There is NOT ENOUGH evidence to support the alternative that the proportion of students who have ear infection at one school and the other is different.

4 0

2 years ago

The linear function ƒ(x) = 5x − 8 has a slope of:

olga nikolaevna [1]

Answer:

The slope of y = 5x - 8 is 5.

Since this equation is already in slope-intercept form the slope of the graph is the coefficient of x, 5.

Step-by-step explanation:

The slope of y = 5x - 8 is 5.

Since this equation is already in slope-intercept form the slope of the graph is the coefficient of x, 5.

3 0

1 year ago

Read 2 more answers

A positive real number is 2 less than another. When 4 times the larger is added to the square of the smaller, the result is 49.

Kobotan [32]

Answer:

The numbers are

$-2+3\sqrt{5}$ and $3\sqrt{5}$

Step-by-step explanation:

Let

x -----> the smaller positive real number

y -----> the larger positive real number

we know that

A positive real number is 2 less than another

$x=y-2$

$y=x+2$ ----> equation A

When 4 times the larger is added to the square of the smaller, the result is 49

$4y+x^2=49$ ----> equation B

substitute equation A in equation B

$4(x+2)+x^2=49$

solve for x

$x^2+4x-41=0$

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$x^2+4x-41=0$

$a=1\\b=4\\c=-41$

substitute in the formula

$x=\frac{-4\pm\sqrt{4^{2}-4(1)(-41)}} {2(1)}$

$x=\frac{-4\pm\sqrt{180}} {2}$

$x=\frac{-4\pm6\sqrt{5}} {2}$

$x=-2\pm3\sqrt{5}$

The positive real number is

$x=-2+3\sqrt{5}$

Find the value of y

$y=x+2$

$y=-2+3\sqrt{5}+2$

$y=3\sqrt{5}$

6 0

3 years ago

Which subtraction problem does NOT require zero pairs to solve using chips ? ( PLEASE ANSWER ASAP )

Mama L [17]

Answer:

Step-by-step explanation:

7 0

2 years ago

A rectangle has a length of 10 inches and a width of 8 inches

Serjik [45]

I’m assuming you want to work out the area
area = length x width
area = 10 x 8
area = 80 inches^2

3 0

2 years ago