Jake studied x hours for a big test. Julie studied half as long. Write an algebraic expression for long julie studied.

Mathematics

1 answer:

kipiarov [429]4 years ago

6 0

X/2 is howling Julie studied

You might be interested in

number line to represent all values that round 500 when rounded to the nearest hundred and 450 when rounded to the nearest ten.

Law Incorporation [45]

The answer is 460 because 460 is the nearest 10 to 50 (50+10)

5 0

3 years ago

A pair of skis were $275 but were on sale for $195. What percent reduction is this?

Stels [109]

$275*x%=195

It will be a 29% reduction. But it will not have the exact cost of $195

7 0

4 years ago

Fifteen SmartCars were randomly selected and the highway mileage of each was noted The analysis yielded a mean of 47 miles per g

laiz [17]

Answer: a. 47 plusminus (1.753*(5 ÷ 3.8730)

Step-by-step explanation:

Confidence interval is written in the form,

(Sample mean - margin of error, sample mean + margin of error)

The sample mean, x is the point estimate for the population mean.

Margin of error = z × s/√n

Where

s = sample standard deviation = 5

n = number of samples = 15

z represents the test statistic

From the information given, the population standard deviation is unknown and the sample size is small, hence, we would use the t distribution to find the test statistic score

In order to use the t distribution, we would determine the degree of freedom, df for the sample.

df = n - 1 = 15 - 1 = 14

Since confidence level = 90% = 0.90, α = 1 - CL = 1 – 0.90 = 0.1

α/2 = 0.1/2 = 0.05

the area to the right of z0.05 is 0.05 and the area to the left of z0.05 is 1 - 0.05 = 0.95

Looking at the t distribution table,

z = 1.753

Margin of error = 1.753(5 ÷ 3.8730)

Confidence interval = 47 ± 1.753(5 ÷ 3.8730)

8 0

3 years ago

pt&t has a special plan offer this month. there is a 6.00 per month charge each month and calls everywhere in the united sta

Ierofanga [76]

Answer:

The monthly cost be if you typically talk for 550 minutes per month would be 28.

Step-by-step explanation:

The monthly cost is function of the time t, in minutes, is given by the following equation.

$C(t) = C_{0} + at$

In which $C_{0}$ is the fixed cost and a is the cost of the minute.

pt&t has a special plan offer this month. there is a 6.00 per month charge each month and calls everywhere in the united states are 0.04 per minute.

This means that $C_{0} = 6, a = 0.04$ . So