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aleksandr82 [10.1K]
4 years ago
8

Please help will give brainly and all my points but please show work

Mathematics
2 answers:
kow [346]4 years ago
7 0

Answer:

5+2(3x-4)-x

5+6x-8-x

it is simplified to -3+5x

Step-by-step explanation:

sammy [17]4 years ago
5 0

Answer:

Q10: 5x - 3

Q15: s = 2

Q21: 4 ft

Q24: -33%

Q42: 10.3

Step-by-step explanation:

Question 10) Simplify. 5 + 2(3x − 4) − x

5 + 6x - 8 - x

= -3 + 5x

= 5x -3

Question 15) Solve. 27s − 29 = 54s − 83.

27 s -27 s -29 + 83 = 54 s -27 s -83 + 83

54 = 27 s

s = 2

Question 21) On a sunny day, a 2-foot red kangaroo casts a shadow that is 7 feet long. The shadow of a nearby eucalyptus tree is 14 feet long. Find the height of the tree.

The ratio of the tree and kangaroo is 2:1

Therefore, using this logic, 14 / 7 = 2, 2 x 2 = 4ft

The height of the tree is 4ft

Question 24) Find the percent change from 600 to 408. Tell whether it is a percent increase or decrease. If necessary, round your answer to the nearest percent.

408 / 608 = 0.67 = 67%

67 - 100 = -33%

This is a percent decrease

Question 42) Use the distance formula to find the distance to the nearest tenth, from R(7, −2) to W(−2, 3).

Distance formula: d = sqrt((x2 - x1)^2 + (y2 - y1)^2)

d = sqrt((-2 - 7)^2 + ( 3 - (-2))^2

d = sqrt((-9)^2 + (5)^2)

d = sqrt(81 + 25)

d = sqrt(106)

d = 10.29 = 10.3 (nearest tenth)

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creativ13 [48]

Answer:

Alternative hypothesis:\mu_1 -\mu_2 \neq 0

Or in the alternative way would be:

 Alternative hypothesis:\mu_1 \neq \mu_2

Step-by-step explanation:

A hypothesis is defined as "a speculation or theory based on insufficient evidence that lends itself to further testing and experimentation. With further testing, a hypothesis can usually be proven true or false".  

The null hypothesis is defined as "a hypothesis that says there is no statistical significance between the two variables in the hypothesis. It is the hypothesis that the researcher is trying to disprove".

The alternative hypothesis is "just the inverse, or opposite, of the null hypothesis. It is the hypothesis that researcher is trying to prove".

On this case the claim that they want to test is: "The means for the two groups (American Idol and 60 Minutes) is the same". So we want to check if we have significant differences between the two means, so this needs to be on the alternative hypothesis and on the null hypothesis we need to have the complement of the alternative hypothesis.

Null hypothesis:\mu_1 -\mu_2 = 0

This null hypothesis can be expressed like this:

Null hypothesis:\mu_1 = \mu_2

Alternative hypothesis:\mu_1 -\mu_2 \neq 0

Or in the alternative way would be:

Alternative hypothesis:\mu_1 \neq \mu_2

4 0
3 years ago
WERE ARE ALL MY GAY QUEENS AND KINGS OUT THERE♥️(love y'all)<br>​
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RIGHT HEREEEEEEEEEEEEE
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