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Maru [420]
3 years ago
13

Write a numerical expression to represent the phrase.

Mathematics
1 answer:
liubo4ka [24]3 years ago
7 0

Answer:

30 / (5+7) = x

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Is 12 posters for 36 students equivalent to 21 posters to 63 student
Dmitry [639]

yes.

this is division. 36 divided by 12 is 3. 63 divided by 21 is 3.

3 0
3 years ago
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150 decreased by 60%
kodGreya [7K]
Hello there the answer to your question would be 60. Since 150-(60%*150) = 150 - 60 *150 = (1-60%)*150 = (100%-60%) * 150= 40% * 150 = 40/100 * 150 = 40 * 150 ÷ 100 = 6000/100 = 60. Hope this helps you out, have a great day!
8 0
3 years ago
Write this in order: (greatest to least:)<br> 112 , 100.789 , 101.89 , 101.9 , 190. 1
ruslelena [56]

Answer:

190.1, 101.89, 101.9, 100.789, 112, 1

Step-by-step explanation:

7 0
3 years ago
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Is y=7.5x a proportional relationship and why
DerKrebs [107]
Direct Proportion functions look like this:

y=kx

'k' is the constant of proportionality and in this case its 7.5 or 15/2.

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

When x=1, y=7.5
When x=2, y=15
When x=3, y=22.5

Therefore y is directly proportional to x.

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

DIRECT PROPORTION EXPLAINED:

Say a football costs £7.50. If you buy one football you'll have to pay out £7.50, but if you you buy two footballs you'll have to pay out £15.00. Therefore the cost of the football(s) is directly proportional to the amount of footballs you buy. C=cost, f=football(s) and C<span>∝f, therefore C=kf, but as k=7.5, C=7.5f.

INVERSE PROPORTION EXPLAINED:

If it were to take 8 hours for one bricklayer to set up a wall, how long would it take for two bricklayers to set up a wall? The answer in this case would be 4 hours.

T=time to set up a wall
b=bricklayer(s)

Therefore T</span><span>∝1/b, and T=k/b. In this case k=8 so T=8/b.

When b=1, T=8.
When b=2, T=4.

We'd say that the time it would take for bricklayers to set up a wall would be inversely proportional to the amount of bricklayers available.</span>
4 0
3 years ago
Write an expression having only two terms that is equivalent to 2x – 3. Explain how you wrote the expression and how you can che
mihalych1998 [28]

Answer:

The expression –3 + 2x is equivalent to 2x – 3. I know it is equivalent because for every value of x that is substituted in, the two expressions simplify to the same value. I took the expression and used the commutative property to not change the value.

8 0
3 years ago
Read 2 more answers
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