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3 years ago

Solve for x:- x + 65 = 120 Thanks!

2 answers:

8 0

To solve for x we will use the INVERSE OPERATION of addition which is subtraction. Lets do it:-

x + 65= 120
x = ?
120 - 65 = x
120 - 65 = 55
x = 55

CHECK OUR WORK:-

x + 65 = 120
x = 55
55 + 65 = ?
55 + 65 = 120
We were RIGHT!!!!

So, x = 55.

Hope I helped ya!! xD

Rama09 [41]3 years ago

7 0

X + 65 = 120
-65 -65

x = 55

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Based on the information from Harper's Index, 37 out of 100 adult Americans who did not attend college believe in extraterrestri

Natalija [7]

Answer: Yes, this indicate the proportion of adult americans that attended college and believe in extraterrestrials is higher than the proportion that did not attend college.

Step-by-step explanation:

Since we have given that

Hypothesis:

$H_0:p_1=p_2\\\\H_a:p_1>p_2$

n₁ = 100

x₁ = 37

So, $p_1=\dfrac{x_1}{n_1}=\dfrac{37}{100}=0.37$

n₂ = 100

x₂ =47

So, $p_2=\dfrac{47}{100}=0.47$

At 0.01 level of significance, z = 2.33

So, test statistic value would be

$z=\dfrac{p_1-p_2}{\sqrt{\dfrac{p_1(1-p_1)}{n_1}+\dfrac{p_2(1-p_2)}{n_2}}}\\\\z=\dfrac{0.37-0.47}{\sqrt{\dfrac{0.37\times 0.63}{100}+\dfrac{0.47\times 0.53}{100}}}\\\\z=-1.44$

Since, 2.33>-1.44

Hence, we will reject the null hypothesis.

Therefore, Yes, this indicate the proportion of adult americans that attended college and believe in extraterrestrials is higher than the proportion that did not attend college

8 0

3 years ago

-3x + 8 = 17 and 1 + 4x = -15

grin007 [14]

Answer:

1) x= -3

2) x=-4

Step-by-step explanation:

The first equation is :

-3x+8=17

solving for x

-3x=17-8 ------------by collecting like terms

-3x=9

Divide both sides by -3

-3x/-3=9/-3

x= -3

In the second equation

1+4x= -15

solving for x

4x=-15-1

4x = -16

x=-16/4

x= -4

3 0

4 years ago

Need 78 pieces of wood 29 cm long. Boards are 6 m long. How many boards are needed?

Wittaler [7]

I believe the answer is 4 because 6m/29= 20.6897 and so then you do 20.6897 x 3= 62.0691. So 3 is too small so do 20.6897x 4= <span>82.7588. 82 >78 so the answer is that you need 4 boards.
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5 0

3 years ago

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vitfil [10]

It’s going up at the same rate
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7 0

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dangina [55]

Answer:

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Step-by-step explanation: