Fill in the missing reason for this

Mathematics

1 answer:

iris [78.8K]3 years ago

3 0

The steps are:

$\begin{array}{c|c}\text{step}&\text{reason}\\3x+5=14&\text{given}\\3x=9&\text{subtraction property of equality}\\x=3&\text{division property of equality}\end{array}$

In the first step you subtracted 5 from both sides, in the second step you divided both sides by 3.

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Janice Went to five different stores in the mall, she spent an average of $30 at each store. After visiting just the first four

777dan777 [17]

Based on Janice average, she spent $50 at the last store.

Let a, b, c, d, e represent the money spent on the five stores respectively.

Since she spent an average of $30 at each store, hence:

(a + b + c + d + e) / 5 = 30

(a + b + c + d + e) = 150

She spent $100 on the first four stores, hence:

a + b + c + d = 100

(a + b + c + d + e) = 150

100 + e = 150

e = 50

Hence based on Janice average, she spent $50 at the last store.

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3 years ago

Twenty-six students will attend the field trip to the career center. The cost to attend the career center is $x. Fifteen of thes

dexar [7]

Answer=I

15(x+3)+11x represents the total cost

To solve for this, let's look at the information that we know...

26 students go on the trip

15 students pay $3 more for an additional class (x+3)

26-15=11

11students pay, x, the price of the trip.

So 15(x+3) represents the 15 students who pay for both the trip and the automotive class, and 11x represents the students who simply just pay for the cost of the trip.

Thus, 15(x+3)+11x represents the scenario

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3 years ago

A random sample of 121 automobiles traveling on an interstate showed an average speed of 65 mph. From past information, it is kn

loris [4]

Answer:

95 percent confidence interval for μ is determined by

(60.688 , 69.312)

a) be the same

Step-by-step explanation:

Step (i):-

Given data a random sample of 121 automobiles traveling on an interstate showed an average speed of 65 mph.

The sample size is n= 121