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3 years ago

Plz help ASAP which choice is it and why ?

Mathematics

1 answer:

Delicious77 [7]3 years ago

4 0

Answer:

i think it would be choice D

Step-by-step explanation:

this would be because the 20 is 19.8 tons rounded up, the (1.1) is the increase of the original amount plus the 9.8 rounded up, and the (1.05) is the increase by 5.1. the reason why they multiply these like 20(1.1)(1.05) is because each number in the parenthesis is the increase, when you multiply something by 1.1 it will give you it's 100% + the 10% growth, same goes for the 1.05 which will give you the 100% + the 5% of 20(1.1)

in other words if you just multiplied by .1 you would only get 10% of what you're seeking while if you multiply by 1.1 you would get the 110%. the 1 is 100%, and the extra percentage you seek is the decimal (number behind the dot) that follows

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Solve for x -12+4=100

strojnjashka [21]

Answer by JKismyhusbandbae:

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3 0

3 years ago

The ratio of runners to swimmers was 3:2. When 28 runners dropped out of the competition, the ratio became 5:6. How many total s

xz_007 [3.2K]

The total of 42 swimmers are competing

Step-by-step explanation:

The given is:

The ratio of runners to swimmers was 3 : 2
When 28 runners dropped out of the competition, the ratio became 5 : 6

We need to find how many total swimmers are competing

∵ The ratio of runners to swimmers was 3 : 2

- Multiply each term of the ratio by x

∴ There are 3x runners and 2x swimmers

∵ 28 runners dropped out of the competition

∴ The number of runners who complete = 3x - 28

∵ The ratio became 5 : 6

- Equate the ratio between the new number of runners and the

number of swimmers by 5 : 6

∵ The new number of runners = 3x - 28

∵ The number of swimmers = 2x

∴ $\frac{3x-28}{2x}=\frac{5}{6}$

- By using cross multiplication

∴ 6(3x - 28) = 5(2x)

- Simplify both sides

∴ 18x - 168 = 10x

- Add 168 to both sides

∴ 18x = 10x + 168

- Subtract 10x from both sides

∴ 8x = 168

- Divide both sides by 8

∴ x = 21

∵ The number of swimmers is 2x

∵ x = 21

∴ The number of swimmers = 2(21) = 42

The total of 42 swimmers are competing

Learn more:

You can learn more about the ratio in brainly.com/question/2707032

#LearnwithBrainly

7 0

3 years ago

Help Please? Solve for x. x − 2.7 ≥ 10.3 Solve for x. −0.84x ≤ 168

stiks02 [169]

For the first one, we add 2.7 to both sides to get x≥13. Next, we divide both sides by -0.84 to get x≥ 168/-0.84. SInce we multiplied or divided by a negative number, we switch the sign around and end up with x≥200

4 0

3 years ago

What is the midpoint of a segment whose endpoint are (-3,-3) and (-13,-13)

oksian1 [2.3K]

(((-3) + (-13)) / 2, ((-3) + (-13)) / 2) 
= (-16 / 2, -16 / 2) 
= (-8, -8)

1 = D

5 0

3 years ago

PLEASE HELP ASAAPPP PLEASEE

saw5 [17]

Answer:

m∠1 = 81

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Step-by-step explanation:

The angles are supplemaentary and therefor sum to 180

3x + (x + 72) = 180

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4x = 108

x = 27

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m∠1 = 27(3)

m∠1 = 81

m∠2 = x + 72

m∠2 = 27 + 72

m∠2 = 99

5 0

3 years ago