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Stella [2.4K]
3 years ago
15

Tbh I'm just too lazy to actually do this and my head hurts from the rest of my school work so I'm just asking it on here -2/5 +

1/2
15 points
Mathematics
2 answers:
Leto [7]3 years ago
6 0

Answer:

1/10

Step-by-step explanation:

-2/5 + 1/2

-4/10 + 5/10

-4 + 5/10

= 1/10

Hope this helps!

77julia77 [94]3 years ago
4 0

Answer:

−2/5+1/2=1/10

Step-by-step explanation:

The fractions have unlike denominators. First, find the Least Common Denominator and rewrite the fractions with the common denominator.

Multiply both the numerator and denominator of each fraction by the number that makes its denominator equal the LCD. This is basically multiplying each fraction by 1.

(−2/5×2/2)+(1/2×5/5)=?

Complete the multiplication and the equation becomes

−4/10+5/10=?

The two fractions now have like denominators so you can add the numerators.

Then:

−4+5/10=1/10

This fraction cannot be reduced.

Therefore:

−25+12=110

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32% of 36 is what number?
Butoxors [25]

Answer:

11.52

Step-by-step explanation:

You switch the percent to a decimal and move the number two times to the right so for example 50 percent turns into .5 multiply .32 times 36 is 11.52

3 0
2 years ago
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Simplify: (−2a2b) • (4a5b2)<br> please can someone help!
xz_007 [3.2K]
Hey there hope this helps you out

5 0
3 years ago
What is two and two fourths plus one third
kkurt [141]

Answer:

2 5/6

Step-by-step explanation:

2 2/4 + 1/3

First, you have to make the bottoms of the fraction the same, by figuring out the lowest common denominator. In this case it would be 12. 4x3 = 12. 3x4 = 12.

Multiply the top number by the same number you multiplied the bottom by.

We multiplied the 4 by 3, so we would also multiply the 2 by 3 (which would be 6).

Do the same for the second fraction. 1x4 = 4.

Now we have 2 6/12 + 4/12. We add the top numbers together and we get 10/12.

Now we have to reduce the fractions. We can do this in this situation by just dividing the top and bottom numbers by 2.

2 5/6

8 0
3 years ago
It takes a hose 2 minutes to fill a rectangular aquarium 8 inches long, 9 inches wide, and 13 inches tall. How long will it take
nirvana33 [79]
To make it easier, you calculate the volume of the first aquarium.

1st aquarium:
V = L x W x H
V = 8 x 9 x 13
V = 72 x 13
V = 936 in.
Rate: 936 in./2 min.

Now that you've got the volume and rate of the first aquarium, you can find how many inches of the aquarium is filled within a minute, which is also known as the unit rate. To do that, you have to divide both the numerator and denominator by their least common multiple, which is 2. 936 divided by 2 is 468 and 2 divided by 2 is 1.
So the unit rate is 468 in./1 min. Now that you've got the unit rate, you can find out how long it'll take to fill the second aquarium up by finding its volume first.

2nd aquarium:
V = L x W x H
V = 21 x 29 x 30
V = 609 x 30
V 18,270 inches

Calculations:
Now, you divide 18,270 by 468 to find how many minutes it will take to fill up the second aquarium. 18,270 divided by 468 is about 39 (the answer wasn't exact, so I said "about").
 
2nd aquarium's rate:
18,270 in./39 min.

As a result, it'll take about 39 minutes to fill up an aquarium measuring 21 inches by 29 inches by 30 inches using the same hose. I really hope I helped and that you understood my explanation! :) If I didn't, I'm sorry. I tried. :(
7 0
3 years ago
Find the mean, median and mode from the chart below ​
BlackZzzverrR [31]

Answer:

1. mean=1.5, median=1.7, mode is 1.8

2. mean=102,median=134, mode=no mode

3. mean=1885,median=2300, mode=2300

Step-by-step explanation:

6 0
3 years ago
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