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Tomtit [17]
2 years ago
5

Simplify: 5(8r) + 3(4r)

Mathematics
2 answers:
stich3 [128]2 years ago
5 0
35r+12r =

47r is your answer:))
Mamont248 [21]2 years ago
4 0
40r + 12r
52r is the answer
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Please look at the attached image. Really need Help!! Who ever find answer first will get brainily.
nadya68 [22]

Answer:

27°

Step-by-step explanation:

XWY and VWY are supplementary

∴ XWY + VWY = 180°

∴ XWY = 180° - VWY

XYW and ZYW are supplementary

∴ XYW + ZYW = 180°

∴ XYW = 180° - ZYW

ΔXWY is a right triangle at X

∴ XWY + XYW = 90°

∴ 180° - VWY + 180° - ZYW = 90°

∴ 180° - 6x + 180° - 4x = 90°

∴ 360° - 10x = 90°

∴ 10x = 270°

∴ x = 27°

7 0
2 years ago
Read 2 more answers
Thank you!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
stiks02 [169]

Answer:

your welcomeeeeee!!!

7 0
2 years ago
Read 2 more answers
Suppose that, on average, electricians earn approximately μ= $54,000 per year in the united states. Assume that the distribution
11111nata11111 [884]

Answer:

0.15866.

Step-by-step explanation:

We have been given that on average, electricians earn approximately μ= $54,000 per year in the united states. Assume that the distribution for electricians' yearly earnings is normally distributed and that the standard deviation is σ= $12,000. We are asked to find the probability that the sample mean is greater than $66,000.

First of all, we will find the z-score corresponding to 66,000 using z-score formula.

z=\frac{x-\mu}{\sigma}

z=\frac{66000-54000}{12000}

z=\frac{12000}{12000}

z=1

Now, we need to find the probability that z-score is greater than 1 that is P(z>1).

Upon using formula P(z>A)=1-P(z, we will get:

P(z>1)=1-P(z

Upon using normal distribution table, we will get:

P(z>1)=1-0.84134

P(z>1)=0.15866

Therefore, the probability that the sample mean is greater than $66,000 would be 0.15866 or approximately 15.87\%.

4 0
3 years ago
The blood platelet counts of a group of women have a​ bell-shaped distribution with a mean of 250.8 and a standard deviation of
Iteru [2.4K]

Answer:

a) 68%; b) 99.5%

Step-by-step explanation:

The empirical rule states that 68% of data falls within 1 standard deviation of the mean; 95% of data falls within 2 standard deviations of the mean; and 99.7% of data falls within 3 standard deviations of the mean.

For part a,

We are asked the approximate percentage of women whose platelet counts are within 1 standard deviation of the mean.  According to the empirical rule, this is 68%.

For part b,

We are given the endpoints of the interval.  The lower endpoint is 181.5; this is 250.8-181.5 = 138.6 away from the mean.  Dividing by the standard deviation, 69.3, we have

138.6/69.3 = 2

This is 2 standard deviations away from the mean.

The higher endpoint is 320.1; this is 320.1-181.5 = 138.6 away from the mean.  Dividing by the standard deviation, 69.3, we have

138.6/69.3 = 2

This is standard deviations away from the mean.

This means this interval includes about 95% of women.

4 0
3 years ago
What the expression m/5 represent?
katrin [286]
A variable (m) divided by a number (5)

7 0
3 years ago
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