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3 years ago

Solve for s. 2/3 s + 5/6 s = 21 Enter the answer, as a whole number or as a fraction in simplest form, in the box.

Mathematics

2 answers:

dem82 [27]3 years ago

6 0

The whole problem is in the picture. I Hope this helps

STatiana [176]3 years ago

3 0

Answer:14

Step-by-step explanation: I actually did this test.

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There are 40 pupils in a class. 75% of them are present. How may are present? How many are absent?

Aleonysh [2.5K]

Answer:

30 are present 10 are absent

Step-by-step explanation:

75%=3/4

so 3/4 of them are absent

3/4(40)=30

and 40-30=10 are absent

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2 years ago

I need help with number 4 please help and explain

Shtirlitz [24]

Are you trying to find the area?

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2 years ago

The length of each side of a regular pentagon is increased by 8 inches, so the perimeter is now 65 inches. What is the original

evablogger [386]

Here as the Pentagon is regular so it's all sides will be of equal length . And if we assume It's each side be s , then it's perimeter is going to be (s+s+s+s+s) = 5s.And as here , each side is increased by 8 inches and then it's perimeter is 65 inches , so we got that it's side after increament is (s+8) inches and original length is s inches . And if it's each side is (s+8) inches , so it's perimeter will be 5(s+8) and as it's equal to 65 inches . So , 5(s+8) = 65

${:\implies \quad \sf 5(s+8)=65}$

${:\implies \quad \sf 5s+5\times 8=65}$

${:\implies \quad \sf 5s+40=65}$

${:\implies \quad \sf 5s=65-40}$

${:\implies \quad \sf 5s=25}$

${:\implies \quad \sf s=\dfrac{25}{5}=5}$

${:\implies \quad \bf \therefore \quad \underline{\underline{s=5\:\: Inches}}}$

As we assumed the original side to be s .

Hence, the original side's length 5 inches 

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2 years ago

Ratio, proportion, percent 52 plates to 24 bowls

AleksAgata [21]

So to get a ratio of plates to bowl, you divide both the numbers by a common multiple, which I found the greatest to be 4. So you divide 52 by 4 and 24 by for to get a ratio of 13 plates to 6 bowls. (Also written as: 13:6, 13/6, or 13 to 6)

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3 years ago

Could u help me make sure its the right answer i can't get this wrong .

Black_prince [1.1K]

Answer:

12x + 6y = 102

5x - 6y = 34

17x = 136

x = 8

y = 1

5 0

3 years ago

Read 2 more answers