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2 years ago

14.

Mathematics

1 answer:

eduard2 years ago

7 0

Answer: C: y=1.15x + 10.95

Step-by-step explanation:

look it up

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Find the part using the multiplication shortcut.<br> 17.5% of 1440 cell phones

kobusy [5.1K]

Answer:

252

Explanation:

An equation to represent the situation is:

17.5% * 1440

convert 17.5% into a decimal:

0.175

and then solve:

0.175 * 1440 = 252

5 0

2 years ago

Read 2 more answers

your team wins 18 medals at a track meet the medals are gold silver and bronze in ratio of 2;2;5. how many of each medal were wo

WITCHER [35]

The team won 4 gold medals, 4 silver medals and 10 bronze medals.

Step-by-step explanation:

Given,

Total medals won = 18

Ratio of gold, silver and bronze = 2:2:5

Let,

x be the original number.

Therefore,

Gold medals = 2x

Silver medals = 2x

Bronze medals = 5x

According to given statement;

$2x+2x+5x=18\\9x=18$

Dividing both sides by 9

$\frac{9x}{9}=\frac{18}{9}\\x=2$

Gold medals = 2x = 2(2) = 4

Silver medals = 2x = 2(2) = 4

Bronze medals = 5x = 5(2) = 10

The team won 4 gold medals, 4 silver medals and 10 bronze medals.

Keywords: ratio, division

Learn more about division at:

#LearnwithBrainly

8 0

3 years ago

3 coins Priya spends $45 on gas, $10 on dinner, and $8 on a video game. How much money did Priya spend on variable expenses?

NISA [10]

Answer:

3x=63

Step-by-step explanation:

3 coins means a coin is x and total expenditure is equal to 63

8 0

2 years ago

George bought 7.5 cases of pancake mix for his diner. A case contains 12 1.3-pound boxes. How many pounds of pancake mix did Geo

lions [1.4K]

First step

12 x 1.3

Second step

15.6 x 7.5

The answer is 117 :)

6 0

2 years ago

Read 2 more answers

We wish to construct a 90% confidence interval on the mean of a population known to be normally distributed based on a sample of

sergiy2304 [10]

Answer:

Margin of error = 0.773

Step-by-step explanation:

We are given the following information in the question.

Sample size, n = 20

Sample mean = 8

Sample standard deviation = 2

90% Confidence interval

$\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 19 and}~\alpha_{0.10} = \pm 1.729$

Margin of error:

$t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$1.729(\frac{2}{\sqrt{20}} ) = 0.773$

7 0

3 years ago