MATHEMATICS MIDDLE SCHOOL

What is the value of the expression x + (–y) when x = –3.8 and y = 1.7?A.
–2.1

B.
5.5

C.
2.1

D.
–5.5

Answers

Answer 1
Answer: -3.8 + (-1.7) =   -3.8 - 1.7 

-5.5     the answer is D 
Answer 2
Answer: D. -5.5

x + (-y)
(-3.8) + (-1.7)
= -5.5

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f(x)=2x+b \to \ line \ one \n\n\n \boxed{5}=2* \boxed{(-1)} +b \to line \ two \n\n\n \boxed{5}=\boxed{-2}+b\to line \ three \n\n\n \boxed{5+2}=b \to \ line \ four \n\n \boxed{7}=b

Which is longer 1/3 of a minute or 2/3 of a minute?

Answers

2/3 of a minute is longer than 1/3 of a minute
2/3 of a minute, because 2/3 is greater than 1/3.

Please help me! Very desperate

Answers

Its the second one. 
The answer is 256. 

Tom drank 1 1/4 quarts of water and his sister Jane drank 1.75 quarts of water. Write the amount that Jane drank using afraction. Who drank more water?
(Doesn’t have choices)

Answers

Answer:

Jane drank 1 3/4 quarts of water.

Jane drank more water than Tom

Step-by-step explanation:

Tom drank  = 1 1/4 quarts of water

Jane drank = 1.75 quarts of water

We have to write the amount of water Jane drank in fraction.

There are some steps to convert decimal into fraction.

Step 1:

Value is 1.75:

Put the 1 aside and just work on 0.75

Write down the decimal value divided by 1

Like, 0.75/1

Step 2:

Now multiply both the numerator and denominator by 100.

We will multiply the numerator and denominator by 100 because 1.75 has two values after the decimal.

0.75 *100/1*100

75/100

Step 3:

Simplify the fraction.

divide the fraction by 5.

=15/20

=3/4

Now bring back the 1: and the fraction will become.

1 3/4

Jane drank 1 3/4 quarts of water.

Now who drank more water?

Jane drank more water than Tom

Reason:

Tom drank 1 1/4 = 5/4

Jane drank  1 3/4 = 7/4

Both the fractions have same denominator, so the value with the greater numerator drank more water than the other.

Therefore Jane drank more water than Tom....

Please help me with this question: Mai is reading a 360 page book. She has already read 270 pages. What percentage of the book has she read?

Answers

Answer:

75%

Step-by-step explanation:

270 of 360 can be written as:

270

360

To find percentage, we need to find an equivalent fraction with denominator 100. Multiply both numerator & denominator by 100

270

360

×

100

100

= (

270 × 100

360

) ×

1

100

=

75

100

Therefore, the answer is 75%

If you are using a calculator, simply enter 270÷360×100 which will give you 75 as the answer.

Answer:

75%

Step-by-step explanation:

How would you solve 7 - 3y = 22

Answers

7-3y=22 -7 -7 -3y=15 Divide by -3. y=-5
22+-7=15  3y = 15 then
Divide each side by '3'. y = 5
Simplifying y = 5
so your answer is going to be 5
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