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Alex777 [14]
3 years ago
13

Chapter 5 QuizWhat is the sum of the two expressions?(2/5x + 3)+(1/5x - 1)​

Mathematics
2 answers:
____ [38]3 years ago
6 0

Answer:

3/5 x + 2

Step-by-step explanation:

2/5 + 1/5 = 3/5

3 + (-1) = 2

add back in variables,

3/5 x + 2

larisa [96]3 years ago
4 0

Answer:

1/5x+2

Step-by-step explanation:

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Manny’s sister bought school supplies that totaled $457. After a coupon, the total came down to $418. Which equation shows how t
kompoz [17]

Answer:

if you are subtracting then you would : 457-418=39


4 0
3 years ago
The Graduate Management Admission Test (GMAT) is a standardized exam used by many universities as part of the assessment for adm
IgorC [24]

Answer:

16.7% of GMAT scores are 647 or higher

Step-by-step explanation:

The Empirical Rule states that 68% of the values are within 1 standard deviation of the mean(34% above, 34% below). It also considers that 50% of the values are above the mean and 50% are below the mean.

In this problem, we have that the mean \mu is 547 and that the standard deviation \sigma is 100.

a. What percentage of GMAT scores are 647 or higher?

647 is 1 standard deviation above the mean.

So, 50% of the values are below the mean. Those scores are lower than 647.

Also, there is the 34% of the values that are above the mean and are lower than 647.

So, there is a 50% + 34% = 84% percentage of GMAT scores that are 647 or lower.

The sum of the probabilities must be 100

So, the percentage of GMAT scores that are 647 or higher is 100% - 84% = 16%.

3 0
2 years ago
It takes 23 minutes for 6people to paint 6 walls.
Step2247 [10]

It would take 9 people 34.5 minutes to paint 9 walls.

23 divided by 6 equals 3.83. That is how many minutes it takes one person to paint one wall. Multiply 3.83 by 9 and you get your answer, 34.5 minutes.

5 0
3 years ago
Angle B measures 60°. What is the measure of the angle that is complementary to angle B?
balandron [24]
Complement angles equal to 90.

So,

90-60 = 30

So the angle complement to 60 is 30.

Hope that helps:)
8 0
2 years ago
Read 2 more answers
Identify the property demonstrated:
BartSMP [9]
So I think it’s D. So you’ll do 5 x 5 x 5 = 125 then x 2 = 250
6 0
2 years ago
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