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Nadya [2.5K]
3 years ago
15

Solve the following sums: a) 4(a+1)=2 b) 3-9x=-6-8x c) 3(4x-1)=7(2x-5)

Mathematics
1 answer:
aliya0001 [1]3 years ago
7 0

Step-by-step explanation:

A. 4(a + 1) = 2

= 4a + 4 = 2

= 4a = 2-4 = - 2

= a = - 2/ 4 = - 1/2

B. 3 - 9x = - 6-8x

3 + 6 = - 8x +9x

9 = x

C. 12x - 3 = 14x - 35

- 3 + 35 = 14x - 12x

32 = 2x

32 / 2 = x

16 = x

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We have:
a=9;\ c=13
Substitute:
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7 0
3 years ago
Need rn. worth 30.
Likurg_2 [28]

Considering the situation described, the confidence interval is given by:

(0.35, 0.51).

<h3>What is a confidence interval?</h3>

It is given by the <u>estimate plus/minus the margin of error</u>.

For this problem, we have that:

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  • The margin of error is half the range of the observations, hence M = (0.48 - 0.32)/2 = 0.08.

Then, the bounds of the interval are given by:

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More can be learned about confidence intervals at brainly.com/question/25890103

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2 years ago
Find the distance<br> 32 and −18
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6 0
3 years ago
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Alison bought 12 shares in The Toy Company when it cost $27. She is planning on selling her shares and they currently cost $39.5
Romashka-Z-Leto [24]

Answer:

46%

Step-by-step explanation:

Given :

Alison bought 12 shares in The Toy Company when it cost $27.

She is planning on selling her shares and they currently cost $39.50.

To Find: . What is the percent increase in sale price?

Solution :

Previous cost = $27

Current cost = $39.50

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Thus Percent increase in sale price = 46%

Hence option C is correct

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4 years ago
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