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4 years ago

7

4 questions, if you dont know all of them please just help with at least 1. i have crossed out the ones i dont need help with. h

elp me for brainliest <3

1 answer:

Bingel [31]4 years ago

8 0

Answer:

the part you crossed out makes it look like a person's eyes and eye brows lol

Step-by-step explanation:

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Write 2.3181818 as a mixed number

Marina CMI [18]

We convert 2.3181818 to fraction as follows:

Let x = 2.3181818 . . . . . (1)

as can be seen, the repeating digits are 18

Multiply both sides of equation (1) by 1,000 to get
1,000x = 2318.1818 . . . . . (2)

Also, multiply both sides of equation (1) by 10 to get
10x = 23.181818 . . . . . (3)

Subtract equation (3) from equation (2) to get
990x = 2,295

Thus,
$x= \frac{2,295}{990} =2 \frac{7}{22}$

5 0

3 years ago

If -8x + 8 = 51, what does x equal?

ladessa [460]

Step-by-step explanation:

Given

- 8x + 8 = 51

- 8x = 51 - 8

- 8x = 43

x = - 43 / 8

Hope it will help :)❤

8 0

3 years ago

Read 2 more answers

Santos went on a bike ride of 90 miles. He realized that if he had gone 24 mph faster, he would have

Gnoma [55]

<h3>Answer: 6 mph</h3>

========================================

Explanation:

distance = rate*time

90 = r*t

where r is the slower speed and t is the time it takes when going that slower speed.

If r is bumped up 24 mph faster, to r+24, then Santos takes t-12 hours to get there. The second equation is

90 = (r+24)(t-12)

-------------------------------------

We can solve the first equation for r to get r = 90/t

Then plug this into the second equation and do a bit of algebra

90 = (r+24)(t-12)

90 = (90/t+24)*(t-12)

90 = 90 - 1080/t + 24t - 288

90t = 90t - 1080 + 24t^2 - 288t

0 = 90t - 1080 + 24t^2 - 288t-90t

0 = 24t^2 - 288t - 1080

24t^2 - 288t - 1080 = 0

If you apply the quadratic formula, then you should get the two solutions t = -3 and t = 15. Due to time constraints, I'll skip these steps.

We'll ignore the negative t value. It makes no sense to have a negative time.

So we focus on t = 15 as the only solution.

-------------------------------------

If t = 15, then,

r = 90/t

r = 90/15

r = 6

Santos rode his bike at <u>6 mph</u> at first. Going this speed means he takes 15 hours.

If he rode 24 mph faster, at 6+24 = 30 mph, then he would ride for 15-12 = 3 hours instead. Note that 90/30 = 3.

5 0

3 years ago

Simplify the expression.<br> 3(a – 7) =

Eva8 [605]

The expression simplifies to 3a-21

4 0

3 years ago

Read 2 more answers

Travis is cutting strips of paper for a project. He needs strips that are 114 inches wide. He cut his first strip too wide. His

choli [55]

Travis cuts 125 whole 2/5 inches wide strip if the percent of error was 10% the actual length of the strips he needs to cut was 114 inches

<h3>What is the percentage?</h3>

It is defined as the ratio of two numbers expressed in the fraction of 100 parts. It is the measure to compare two data, the % sign is used to express the percentage.

We have:

The length Travis needs to cut = 114 inches

Percent of error = 10%

Let's assume he cuts x inches wide strip

So from the percent of error formula:

$\rm \dfrac{x-114}{114} = \dfrac{10}{100}$

$\rm x = \dfrac{114}{10}+114$

$\rm x = \dfrac{1254}{10}\Rightarrow \dfrac {627}{5}$ or

$\rm x = 125\dfrac{2}{5} \ inches$

Thus, Travis cuts 125 whole 2/5 inches wide strip if the percent of error was 10% the actual length of the strips he needs to cut was 114 inches

Learn more about the percentage here:

brainly.com/question/8011401

#SPJ1

3 0

3 years ago