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2 years ago

11

Please help me this is so annoying and I need it done really fast so if you could just put an quick answer no explanation just t

ell me which answer goes in which thanks so much

1 answer:

pashok25 [27]2 years ago

6 0

Answer:

1. 4 and 1/6

2. 2 and 11/12

Explanation:

convert to improper fraction: 11/2 - 4/3

same denominator: 33/6 - 8/6

subtract: 25/6

convert to mixed number: 4 and 1/6

You might be interested in

One third of the difference of m and n.

Darya [45]

Answer:

m and n are just labels. They don't really mean anything. In this situation m is used as a general label to be summed over, and n is for a specific term in the sum. They're written differently, because that way you can write things like Which is how we come to the second and third equation you list in your post.

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Ignore the top part. <br> but can someone help me with part b please?

Nostrana [21]

Answer:

i think its c

Step-by-step explanation:

5 0

3 years ago

Money Spent on Road Repair A politician wishes to compare the variances of the amount of money spent for road repair in two diff

Mkey [24]

Answer:

(A) Null Hypothesis, $H_0$ : $\sigma_1^{2} =\sigma_2^{2}$ {means that there is no significant difference in the variances of the amounts spent in the two counties}

Alternate Hypothesis, $H_A$ : $\sigma_1^{2} \neq \sigma_2^{2}$ {means that there is a significant difference in the variances of the amounts spent in the two counties}

(B) The F-table gives critical values of 0.359 and 2.781 for (14,17) degrees of freedom for the two-tailed test.

(C) The value of the F-test statistic is 0.611.

(D) We conclude that there is no significant difference in the variances of the amounts spent in the two counties.

Step-by-step explanation:

We are given that a politician wishes to compare the variances of the amount of money spent on road repair in two different counties.

The data are given here below;

County A County B

s1 = $11,596 s2 = $14,837

n1 = 15 n2 = 18

Let $\sigma_1^{2}$ = variances of the amounts spent in County A.

$\sigma_2^{2}$ = variances of the amounts spent in County B.

(A) So, Null Hypothesis, $H_0$ : $\sigma_1^{2} =\sigma_2^{2}$ {means that there is no significant difference in the variances of the amounts spent in the two counties}

Alternate Hypothesis, $H_A$ : $\sigma_1^{2} \neq \sigma_2^{2}$ {means that there is a significant difference in the variances of the amounts spent in the two counties}

The test statistics that would be used here <u>Two-sample F-test statistics </u>distribution;

T.S. = $\frac{s_1^{2} }{s_2^{2} } \times \frac{\sigma_2^{2} }{\sigma_1^{2} }$ ~ $F__n_1_-_1,_ n_2_-_1$

where, $s_1$ = sample standard deviation for County A = $11,596

$s_2$ = sample standard deviation for County B = $14,837

$n_1$ = sample size for County A = 15

$n_2$ = sample size for County B = 18

(B) Now at 0.05 level of significance, the F-table gives critical values of 0.359 and 2.781 for (14,17) degrees of freedom for the two-tailed test.

(C) So, <u><em>the test statistics</em></u> = $\frac{11,596^{2} }{14,837^{2} } \times 1$ ~ $F__1_4,_ 1_7$

= 0.611

The value of the F-test statistic is 0.611.

Now, as we can see that our test statistics lie within the range of critical values of F, so we have insufficient evidence to reject our null hypothesis as it will not fall in the rejection region.

(D) Therefore, we conclude that there is no significant difference in the variances of the amounts spent in the two counties.

7 0

3 years ago

Help answer and explain #7 #8 #9 YOU HAVE TO DO THE STEPS OF HOW u got it.

nordsb [41]

Answer:

For Answer 7 its the first one (x + 6) • (x - 7)

Step-by-step explanation:

Step 1 :

Trying to factor by splitting the middle term

1.1 Factoring x2-x-42

The first term is, x2 its coefficient is 1 .

The middle term is, -x its coefficient is -1 .

The last term, "the constant", is -42

Step-1 : Multiply the coefficient of the first term by the constant 1 • -42 = -42

Step-2 : Find two factors of -42 whose sum equals the coefficient of the middle term, which is -1 .

-42 + 1 = -41

-21 + 2 = -19

-14 + 3 = -11

-7 + 6 = -1 That's it

Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above, -7 and 6

x2 - 7x + 6x - 42

Step-4 : Add up the first 2 terms, pulling out like factors :

x • (x-7)

Add up the last 2 terms, pulling out common factors :

6 • (x-7)

Step-5 : Add up the four terms of step 4 :

(x+6) • (x-7)

Which is the desired factorization

Final result :

(x + 6) • (x - 7)

4 0

3 years ago

(WILL MARK BRAINIEST PLEASE ASSIST) Define the inverse secant function by restricting the domain of the secant function to the i

Svetradugi [14.3K]

Answer:

see the attachment

Step-by-step explanation:

The graph attached shows the secant function in red. The restriction to the interval [0, π/2] is highlighted by green dots, and the corresponding inverse function is shown by a green curve.

The restriction to the interval [π/2, π] is highlighted by purple dots, and the corresponding inverse function is shown in purple.

The dashed orange line at y=x is the line over which a function and its inverse are mirror images of each other.

5 0

3 years ago