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SashulF [63]
3 years ago
11

Solving equations and distributive property

Mathematics
2 answers:
Murljashka [212]3 years ago
8 0

Answer:

x=10

Step-by-step explanation:

2x20=40 and 2x2x=4x move the 40 to the other side so 80-40=40 so 4x=40 4x10=40 so 10 should be correct.

hope this helps!

Serhud [2]3 years ago
5 0

Answer:

The answer is 10

Step-by-step explanation: You multiply the 2 times twenty to get 40 then multiply the 2 times 2x to get 4x then subtract fourty from both sides and you will get fourty and then divide so 40 divided by 4x equals 10.

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Step-by-step explanation:

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7 0
2 years ago
Please help!!!!!!!!!!!¡
Daniel [21]
Your answer would be ( -12/5 x + 2 )
6 0
3 years ago
40$ to the markup rate of 65% what is the final price?
djyliett [7]

Answer:

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Step-by-step explanation:

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4 0
3 years ago
You measure 47 backpacks' weights, and find they have a mean weight of 79 ounces. Assume the population standard deviation is 13
ki77a [65]

Answer:

3.14

Step-by-step explanation:

Given that:

Mean weight (m) = 79 ounces

Population standard deviation (s) = 13.1

Sample size = 47

Maximal margin of error associated with 90% confidence interval.

The margin of error is given by:

Zcritical * (standard deviation / sqrt(sample size)

Z critical at 90% confidence interval = 1.645

Hence,

Zcritical * (standard deviation / sqrt(sample size)

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1.645 * (13.1 / 6.8556546)

1.645 * 1.9108313

Hence, the margin of error is :

3.1433174885

= 3.14

8 0
3 years ago
What is 5s-9<2s+12
IRINA_888 [86]

5s-9 < 2s+12\ \ \ \ \ |\text{add 9 to both sides}\\\\5s < 2s+21\ \ \ \ |\text{subtract 2s from both sides}\\\\3s < 21\ \ \ \ |\text{divide both sides by 3}\\\\\boxed{x < 7\to s\in(-\infty,\ 7)}

5 0
3 years ago
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