Mary was looking at a map with the following scale indicator:

Which question is a statistical question?

Ray Of Light [21]

Answer:

How long does it take the students in my class to travel to school?

Step-by-step explanation:

A statistical question is one that can be answered by collecting data and where there will be variability in that data.

7 0

3 years ago

In a certain triangle, the angle of the greatest measure measures 75 degrees more than the angle of the least measure. If one-th

erma4kov [3.2K]

Let a<b<c

c=75+a and (a+c)/3=b

using c from the first in the second you have:

b=(a+75+a)/3

b=(2a+75)/3

Since this is a triangle, a+b+c=180, using b and c from above we get:

a+(2a+75)/3+75+a=180 making the left side have a common denominator 3

(3a+2a+75+225+3a)/3=180 combine like terms on left side

(8a+300)/3=180 multiply both sides by 3

8a+300=540 subtract 300 from both sides

8a=240 divide both sides by 8

a=30°, since b=(2a+75)/3

b=45°, since c=75+a

c=105°

So the angles are 30°, 45°, and 105°

4 0

4 years ago

Help me why is it this answer? How do i solve that type of math problem green is the answer

Natasha_Volkova [10]

Answer:

To increase a price, add the percentage you wish to increase it by to 100%, convert the percentage into a decimal by dividing by 100, then multiply this by the original price.

To decrease a price, subtract the percentage you wish to decrease it by from 100%, convert the percentage into a decimal by dividing by 100, then multiply this by the original price.

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100% represents the original price.

Therefore, 100% = $599.99

A 20% discount means that the price is now 80% of the original price,
as 100% - 20% = 80%

To find 80% of the original price, convert 80% to a decimal and multiply it by the original price:

80% = 80/100 = 0.8

Therefore, 80% of $599.99 = 0.8 x $599.99

= $479.992

Finally, we need to apply a sales tax of 6%. We can do this in 2 ways:

Way 1

Work out 6% of the discounted price, then add this to the discounted price to find the final price:

Sales tax = 6% of $479.992

= 0.06 x $479.992

= $28.79952

Final price = discounted price + sales tax

= $479.992 + $28.79952

= $508.79 (nearest cent)

Way 2

We need to increase the discounted price of $479.992 by 6%. Therefore, the final price will be 106% of the discounted price as
100% + 6% = 106%

Final price = 106% of discounted price

= 1.06 x $479.992

= $508.79 (nearest cent)

5 0

2 years ago

Shirabi spent $208 on a sewing machine to make purses. She spends a total of $10 on thread, fabric, and accessories for each pur

iren2701 [21]

Answer:

The correct answer is: Option D: 8

Step-by-step explanation:

Given that she spent $208 on the sewing machines

And

the equation for profits to break even is:

208 + 10x = 36x

In order to find the number of purses to break even, we have to find the value of x

So,

$208+10x=36x$

Subtracting 10x from both sides

$208+10x-10x = 36x-10x\\208 = 26x$

Dividing both sides by 26

$\frac{208}{26} = \frac{26x}{26}\\x = 8$

The number of purses is 8

Hence,

The correct answer is: Option D: 8

3 0

3 years ago

Read 2 more answers

The supervisor of a production line wants to check if the average time to assemble an electronic component is different from 14

luda_lava [24]

Answer:

The p-value for the hypothesis test is 0.0042.

Step-by-step explanation:

We are given that the supervisor of a production line wants to check if the average time to assemble an electronic component is different from 14 minutes.

Assume that the population of assembly time is normally distributed with a standard deviation of 3.4 minutes. The supervisor times the assembly of 14 components, and finds that the average time for completion is 11.6 minutes.

Let $\mu$ = average time to assemble an electronic component.

SO, Null Hypothesis, $H_0$ : $\mu$ = 14 minutes {means that the average time to assemble an electronic component is equal to 14 minutes}

Alternate Hypothesis, $H_A$ : $\mu$ $\neq$ 14 minutes {means that the average time to assemble an electronic component is different from 14 minutes}