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irinina [24]
2 years ago
13

At the bookstore, Tim bought a magazine for $4, and five books that all cost the same amount. He spent a total of $129. Which eq

uation expresses how much each book cost?
Mathematics
1 answer:
inn [45]2 years ago
7 0

Answer:

25(b) + 4 = 129

Step-by-step explanation:

b=5

25(5) + 4=129

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A proportional relationship between the number of pounds of potatoes (x) and the price in dollars (y) is graphed, and the ordere
olga55 [171]

Answer:

Part A: The price of 1 pound of potatoes is 1 dollar and 25 cents (1.25) because 5 / 4 is 1.25 and that's 1 pound

Part B: The ordered pair (10, 8) represents that 10 punds of potatoes cost 8 dollars

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2 years ago
Find the lateral area of a rectangluar prism with ?
NikAS [45]

Answer:

40 Squared units

Step-by-step explanation:

A=2*2*4+2*2*6=40

4 0
3 years ago
6. A car dealership would like to estimate the mean mpg of its new model car with 90% confidence. The population is normally dis
Yakvenalex [24]

Answer:

92.9997<\mu<99.5203

Step-by-step explanation:

Using the formula for calculating the confidence interval expressed as:

CI = xbar ± Z * S/√n where;

xbar is the sample mean

Z is the z-score at 90% confidence interval

S is the sample standard deviation

n is the sample size

Given parameters

xbar = 96.52

Z at 90% CI = 1.645

S = 10.70.

n = 25

Required

90% confidence interval for the population mean using the sample data.

Substituting the given parameters into the formula, we will have;

CI = 96.52 ± (1.645 * 10.70/√25)

CI = 96.52 ± (1.645 * 10.70/5)

CI = 96.52 ± (1.645 * 2.14)

CI = 96.52 ± (3.5203)

CI = (96.52-3.5203, 96.52+3.5203)

CI = (92.9997, 99.5203)

<em>Hence a 90% confidence interval for the population mean using this sample data is 92.9997<</em>\mu<em><99.5203</em>

4 0
3 years ago
What is the value of the square root of 25 + the square root of 16?​
kozerog [31]

Answer:9

Step-by-step explanation: square root of 25 is 5 and of 16 the square root is 4 add both of them together and you get 9

6 0
3 years ago
Read 2 more answers
It would be D right ?????
vampirchik [111]
Yea it would be right.
3 0
3 years ago
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