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trapecia [35]
3 years ago
15

-72 by 8 A) -9 B) -8 C) 7 D) 8

Mathematics
2 answers:
monitta3 years ago
8 0

<u><em>Hi there! :) :D</em></u>

<u><em>Answer:</em></u>

<u><em>A. -9</em></u>

<u><em>*The answer must have a negative sign.*</em></u>

Step-by-step explanation:

Lesson: Dividing integers

First, you divide by the numbers from left to right.

72/8=9

It change positive to negative sign.

72/9=8

Then, you can also multiply by the numbers from left to right.

9*8=72

8*9=72

<u><em>Final answer is -9</em></u>

Hope this helps!

Have a nice day! :)

:D

-Charlie

Thank you so much! :)

:D

Gekata [30.6K]3 years ago
7 0
-9
9 times 8 is 72 its negative ultimately the same thing (easy way to look at it) with a dif sign
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Suppose in the population, the Anger-Out score for men is two points higher than it is for women. The population variances for m
tatuchka [14]

Answer:

a)= 2

b) 6.324

c) P= 0.1217

Step-by-step explanation:

a) The mean of the sampling distribution of X`1- X`2 denoted by ux`-x` = u1-u2 is equal to the difference between population means i.e = 2 ( given in the question)

b) The standard deviation of the sampling distribution of X`1- X`2 ( standard error of X`1- X`2) denoted by σ_X`1- X`2 is given by

σ_X`1- X`2 = √σ²/n1 +σ²/n2

Var ( X`1- X`2) = Var X`1 + Var X`2 =  σ²/n1 +σ²/n2

so

σ_X`1- X`2 =√20 +20 = 6.324

if the populations are normal the sampling distribution X`1- X`2 , regardless of sample sizes , will be normal with mean u1-u2 and variance σ²/n1 +σ²/n2.

Where as Z is normally distributed with mean zero and unit variance.

If we take X`1- X`2= 0 and u1-u2= 2  and standard deviation of the sampling distribution = 6.324 then

Z= 0-2/ 6.342= -0.31625

P(-0.31625<z<0)= 0.1217

The probability would be 0.1217

8 0
2 years ago
. In the past decades there have been intensive antismoking campaigns sponsored by both federal and private agencies. In one stu
Sergeeva-Olga [200]

Answer: B. H_0:p_1=p_2

H_a:p_1>p_2

Step-by-step explanation:

Let p_1 be the proportion of all U.S. adults that smoked in 1995. Let p_2 denote the proportion of all U.S. adults that smoked in 2000.

Objective for the study : Whether the proportion of U.S. adults that smoke declined during the 5-year period between the samples.

i.e. p_1>p_2

Alternative hypothesis(H_a) is the statement containing population  parameter that shows there is significant difference between the groups being tested.

⇒ H_a:p_1>p_2

Null hypothesis(H_0) is the statement containing population parameter that shows there is no significant difference between the groups being tested.

⇒ H_0:p_1=p_2

Hence, The hypotheses to test in this problem are

H_0:p_1=p_2

H_a:p_1>p_2

Hence, the correct answer is B. H_0:p_1=p_2

H_a:p_1>p_2

8 0
3 years ago
How many like terms are in the expression? 14 x minus 14 y 7 minus x z 2 x 0 2 3 5.
Cerrena [4.2K]

Like terms are those terms, which have the common variable with same powers.

The number of like terms in the given expression are 3, which is (14x,-x,2x). the option 3 is the correct option.

<h3>What is like terms?</h3>

In the algebra or the algebraic expression the like terms are those terms, which have the common variable with same powers.

Given information-

The given expression in the problem is,

14 x -14 y+ 7 - x+ z+ 2 x

The given expression is the algebraic expression which 3 number of unknowns variables.

There is total 6 terms in the given expression. In which 5 terms consists the variables and one term is constant.

In the given expression,

  • The total number of terms with variable x are 3 which are,(14x,-x,2x).
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  • The total number of terms with variable z is 1 which is z.
  • The total number of constant terms is 1 which is 7.

Thus the number of like terms in the given expression are 3, which is (14x,-x,2x). the option 3 is the correct option.

Learn more about the  like terms here;

brainly.com/question/1779134

8 0
2 years ago
If R is the midpoint of QS, RS=2X-4, ST=4X-1, and RT=8X-43, find QS
Cloud [144]
RT = RS + ST
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8x - 43 = 6x - 5
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2x = 38
x = 38/2
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QS = 2RS = 2(2x-4) = 2(2*19-4) = 2*34 = 68
3 0
3 years ago
-100 = -t/5 - 4<br><br>Find t please! (also explain)​
Damm [24]

Answer:

t = 480

Step-by-step explanation:

When we have equations with variables, we always want to isolate the variable, so lets get rid of 4 first.

Add 4 to both sides :

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Multiply both sides by the denominator :

-480 = -t

Divide both sides by negative 1 :

t = 480

6 0
2 years ago
Read 2 more answers
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