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Vadim26 [7]
3 years ago
8

PLEASE HELPPPP MEEEEEE!!!!

Mathematics
1 answer:
wlad13 [49]3 years ago
8 0
Answer:

It’s B

Step-by-step explanation:


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Christina went to the salon and had 5/8 of an inch of hair cut off. The next day she went back and asked for another 5/8 of an i
Ugo [173]
Here you'll want to add 5/8 with 5/8.  Since they have the same denominator already then 5/8+5/8 = 10/8.  Simplifying that down to 5/4 then changing to a mixed number is 1 1/4 inches.
3 0
3 years ago
Suppose the class sizes in high schools in a major public school district are normally distributed with an unknown population me
Blizzard [7]

Answer:

1.703

Step-by-step explanation:

The reason we try to find t score is because the sample size is below 30, meaning the sample size is small

Hence:

Step 1

We find the degree of freedom

The Degrees of freedom = Number of samples - 1

The random number of samples = 28

= 28 - 1

= 27

Step 2

Using a t score table or t score calculator, we can obtain the t score value for a 90% confidence interval and degree of freedom of 27

90% confidence interval =

10% significance level = 0.10 for two tails or 0.1/2 = 0.05 for one tail

Hence: t90 = 1.703

4 0
3 years ago
Simplify expression -(20 +d)
Verizon [17]

Answer:

-d-20

Step-by-step explanation:

Hope this helps!

5 0
2 years ago
I need help on number 9
lisov135 [29]

Complement angles, sum is equal 90

Give one angle = 70 to find other: 90 - 70 = 20

Answer

Complement of angle with the measure of 70 degrees is 20 degrees

3 0
3 years ago
An electronics store received two shipments of radios. Of the 250 radios in the first shipment, exactly 6% were damaged. In the
nataly862011 [7]

Answer:

Total number of not damaged = 451

C. 451

Step-by-step explanation:

In the first shipment, 6% of the 250 radios where damaged.

Number of damaged= 6/100 * 250

Number of damaged= 6*2.5

Number of damaged= 15 radios.

Number of not damaged= 250-15

Number of not damaged = 235 radios

In the second shipment, 4% of the radios were damaged

Let the number of second shipment= y

0.04 of y where damaged

Total number of radio damaged= 24

15 + 0.04y = 24

0.04y= 24-15

0.04y = 9

Y= 9/0.04

Y= 225

Number of radio in the second shipment= 225

Number of damaged in the second shipment= 0.04*225

Number of damaged in the second shipment= 9

Number of not damaged in the second shipment= 225-9

Number of damaged in the second shipment= 216

Total number of not damaged

= 235+216

= 451

Total number of not damaged= 451

7 0
3 years ago
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