Number 18 idk what to do help plz and fast

Answers

Answer 1

Answer: it is right it is C 454.5

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sierra has a hard time remembering tje product of 9x8. if she knows that 10x8=80, describe how she can use this to help

Here's a pic of the question

Answers

Subtract 5x^3-7x+4 from 9x^3+2x^2-5x+5

What ratio is equivalent to 4 : 13?A. 8 : 17
B. 16 : 52
C. 12 : 33
D. 20 : 55

Answers

the answer would be b . i know this because if you multiply 4 and 13 by 4 you would get 16 and 52 , so the ration 16 : 52 is equivalent to the ration 4 : 13 .

If 6+3 is 15, 7+4 is 24, 5+8 is 32, 9+3 is 24, then what is 8+5?

Answers

Answer:13

Step-by-step explanation:

15. the pattern stays to follow :)

Kevin made a rectangular prism with 8 cubes in each layer. The prism had 4 layers. What is the volume of the rectangular prism?

Answers

256 units³ is the volume, since the length is 8 and the height is 4, you use the formula V=Bh and B is 64, so you simply multiply it by 4, the height

there are 148 juniors and 272 seniors attending prom this year. if there must be three chaperones per 60 students, how many chaperones are needed

Answers

21 chaperones are needed for 420 students.

Step-by-step explanation:

No. of juniors = 148

No. of seniors = 272

Total = 148+272 = 420 students

3 chaperones = 60 students

1 chaperone = $(60)/(3)=20\ students$

Ratio of chaperon to students = 1:20

Let,

x be the number of chaperons for 420 students.

Ration of chaperones to students = x:420

Using proportion

Ratio of chaperones to students :: Ratio of chaperons to students

$1:20::x:420$

Product of mean = Product of extreme

$20*x=420*1\n20x=420\n$

Dividing both sides by 20

$(20x)/(20)=(420)/(20)\nx=21$

21 chaperones are needed for 420 students.

Keywords: ratio, proportion

Learn more about ratios at:

#LearnwithBrainly

I need Help!!A: 65
38
35
15
B: 38
35
12
15
C: 38
35
12
15

Answers

Answer:

Step-by-step explanation:

I'm pretty sure the answer for your question is B,

15 But I'm not sure.

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Please help idk this??

Claire has 3/2 liters of water. She pours the water equally into 6 glasses. How much water is in each glass?