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2 years ago

Help plz. I'll mark brainliest

Mathematics

1 answer:

Vera_Pavlovna [14]2 years ago

6 0

1. rule = r - 12 (number = 25)
2. rule = a + 34 (number = 43)
3. rule = s - 5 (number = 20)
4. rule = b + 16 (number = 32)
5. rule = w + 3 (number = 9)
6. rule = n + 9 (number = 42)

7. 15 - n when n = 9 would be 15 - 9, and your answer would be 6.

8. "32 more than a number d" implies add d to 32, so your answer is C. 32 + d

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Simplify 3m + 7 – 4m + 6

Ksenya-84 [330]

Subtract or add like terms depending on the sign

3m-4m=-1m
7+6=13
Answer:
-1m+13

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2 years ago

What is 25x2+8/5x21 Exact number no rounding

beks73 [17]

Answer:

83.6

Step-by-step explanation:

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2 years ago

Suppose the mean GPA of all students graduating from a particular university in 1975 was 2.40. The registrar plans to look at re

ycow [4]

Answer:

Correct option:

(B) H₀: μ = 2.40 vs. Hₐ: μ ≠ 2.40.

Step-by-step explanation:

The registrar of particular university in 1975 plans to look at records of students graduating last year to see if the mean GPA has changed from 2.40.

The registrar can use a single mean test to determine whether the mean has changed or not.

The hypothesis can be described as:

H₀: The mean GPA is 2.40, i.e. μ = 2.40.

Hₐ: The mean GPA is different from 2.40, i.e. μ ≠ 2.40.

To perform the test the registrar can either use a z-distribution or a t-distribution.

If the data provided gives some insight about the population standard deviation and the sample selected is quite large then the z-distribution can be used.

Otherwise it is wiser to use a t-distribution.

The decision rule is:

If the p-value of the test is less than the significance level then the null hypothesis will be rejected and vice-versa.

Thus, the correct option is (B).

6 0

3 years ago

Express 512 as a power of 2. a) 2*8* b) 27*7* c)29*9* d) 210*10*

mote1985 [20]

Answer:

256^2

Step-by-step explanation:

256 power 2 is in a power of 2

7 0

2 years ago

locksmith larry charges $90 for a house cal plus $20 per hour. Locksmith Barry charges $50 for a house call plus $30 per house.

nadya68 [22]

Answer:

4 hours

Step-by-step explanation:

Equations :

Larry : y = 20x + 90

Barry : y = 30x + 50

Equate both to find the number of hours at which they both charge the same :

20x + 90 = 30x + 50
30x - 20x = 90 - 50
10x = 40
x = 4 hours

4 0

2 years ago