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Vlad [161]
2 years ago
5

Jason is driving at a speed of 55 miles per hour. Let h represent the number of hours Jason drives at this speed. Which expressi

on represents the situation? ?
A 55h

B 55−h

C 55 over h

D 55+h
Mathematics
2 answers:
In-s [12.5K]2 years ago
7 0
A or D I’m pretty sure it’s A
Paraphin [41]2 years ago
4 0

Answer:

a

Step-by-step explanation:

You might be interested in
Name two ways you might see decimals used outside schools.
Maru [420]

Answer:


Step-by-step explanation:

counting money after shopping or depositing money

6 0
3 years ago
Carson purchased supplies for his computer for $64. The sales tax was $4.16. He gave the salesperson $80. How much change did he
krek1111 [17]
To work this out you need to do 80 - 64 - 4.16 = 11.48

he received $11.48 change
3 0
3 years ago
The standard IQ test has a mean of 97 and a standard deviation of 17. We want to be
densk [106]

Let's call our estimate x. It will be the average of n IQ scores. Our average won't usually exactly equal the mean 97.  But if we repeated averages over different sets of tests, the mean of our estimate the average would be the same as the mean of a single test,

μ = 97

Variances add, so the standard deviations add in quadrature, like the Pythagorean Theorem in n dimensions.  This means the standard deviation of the average x is

σ = 17/√n

We want to be 95% certain

97 - 5 ≤ x ≤ 97 + 5

By the 68-95-99.7 rule, 95% certain means within two standard deviations. That means we're 95% sure that

μ - 2σ ≤ x ≤ μ + 2σ

Comparing to what we want, that's means we have to solve

2σ = 5

2 (17/√n) = 5

√n = 2 (17/5)

n = (34/5)² = 46.24

We better round up.

Answer: We need a sample size of 47 to be 95% certain of being within 5 points of the mean

6 0
3 years ago
20 POINTS PLS FAST
Sati [7]

Answer:

d

Step-by-step explanation:

i think its d

5 0
3 years ago
HELP PLEASEEEE Lots of points
MArishka [77]

Answer:

-4, 2, 3

Step-by-step explanation:

Centre: (-4,2)

Radius: 3

(x - -4)² + (y - 2)² = 3²

7 0
3 years ago
Read 2 more answers
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