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3 years ago

What are the x-intercept and y-intercept of the graph of y=−2x−6 ?

Mathematics

2 answers:

amid [387]3 years ago

6 0

-6 is the y-intercept and -3 is the x-intercept

Vladimir [108]3 years ago

4 0

X intercept is -3, y intercept is -6

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A researcher claims that the variation in the salaries of elementary school teachers is greater than the variation in the salari

guajiro [1.7K]

Answer:

The null hypothesis is $H_o : \sigma^2_1 = \sigma^2 _2$

The alternative hypothesis is $H_a : \sigma_1 ^2 > \sigma^2_2$

$F_{critical} = 1.8608$

$F = 2.9085$

The decision rule is

Reject the null hypothesis

There is sufficient evidence to support the researchers claim

Step-by-step explanation:

From the question we are told that

The first sample size is $n_1 = 30$

The sample variance for elementary school is $s^2_1 = 8324$

The second sample size is $n_2 = 30$

The sample variance for the secondary school is $s^2_2 = 2862$

The significance level is $\alpha = 0.05$

The null hypothesis is $H_o : \sigma^2_1 = \sigma^2 _2$

The alternative hypothesis is $H_a : \sigma_1 ^2 > \sigma^2_2$

Generally from the F statistics table the critical value of $\alpha = 0.05$ at first and second degree of freedom $df_1 = n_1 - 1 = 30 - 1 = 29$ and $df_2 = n_2 - 1 = 30 - 1 = 29$ is

$F_{critical} = 1.8608$

Generally the test statistics is mathematically represented as

$F = \frac{s_1^2 }{s_2^2}$

=> $F = \frac{8324 }{2862}$

=> $F = 2.9085$

Generally from the value obtained we see that $F > F_{critical }$ Hence

The decision rule is

Reject the null hypothesis

The conclusion is

There is sufficient evidence to support the researchers claim

4 0

3 years ago

You are a receptionist at a doctor's office. A patient's bill for a checkup totals $85. 0. The patient's health insurance requir

pshichka [43]

Answer:

$17

Step-by-step explanation:

You need to find 20 percent. so find 10 percent or divide by ten then multiply that by two

7 0

2 years ago

Read 2 more answers

Given the right angle triangle shown here, calculate:

charle [14.2K]

Answer:

see explanation

Step-by-step explanation:

(1)

(a)

sin(a) = $\frac{opposite}{hypotenuse}$ = $\frac{15}{17}$

(b)

cos(a) = $\frac{adjacent}{hypotenuse}$ = $\frac{8}{17}$

(c)

tan(a) = $\frac{opposite}{adjacent}$ = $\frac{15}{8}$

----------------------------------------------------

(2)

(a)

sin(b) = $\frac{opposite}{hypotenuse}$ = $\frac{8}{17}$

(b)

cos(b) = $\frac{adjacent}{hypotenuse}$ = $\frac{15}{17}$

(c)

tan(b) = $\frac{opposite}{adjacent}$ = $\frac{8}{15}$

5 0

3 years ago

Read 2 more answers

What is the surface area of this

DochEvi [55]

Answer:

814 in ^2

Step-by-step explanation:

2(wl x hl x hw)

hope this helps

8 0

3 years ago

If you have one dollar, three pennies, and two quarters, how much money do you have?

frosja888 [35]

Answer:

1.53

Step-by-step explanation:

1 dollar = 1.00

3 pennies = 3 * .01 = .03

2 quarters = 2 *.25 = .50

Add this together

1 +.03 +.50 = 1.53

5 0

3 years ago

Read 2 more answers