Help pls explain and how you got it

Mathematics

2 answers:

Lana71 [14]3 years ago

6 0

80% is 120 - 40 is half of 80 so multiply by 2 and you get 120
40% is 60 - given
20% is 30 - 20 is half of forty so half of 60 is 30
10% is 15 - half of 20 is 10 so half of 30 is 15
Not sure about the rest

Lubov Fominskaja [6]3 years ago

4 0

Step-by-step explanation:

just minus 100 out of the percentage

for example 20% is 100 - 20 = 80

You might be interested in

A decimal with a repeating digit of 0

natima [27]

Answer:

Necessarily it could be anything

Step-by-step explanation:

If you want a repeating decimal digit of 0 it's going to be all decimals just to a different place like the tenths place. For example 0.5 is also 0.500000000000... That is why pretty much every decimal has a repeating digit of 0.

6 0

3 years ago

If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalen

stellarik [79]

If you were to use the substitution method to solve the following system, we need to write one of the equation to an expression equivalent to y. Let us say the second equation, we write it as follows:

6x – 3y = –3
-3y = -6x - 3
y = 2x + 1

We substitute the equation to the first given equation as follows:

2x – 5y = –3
2x – 5(2x + 1) = –3
2x - 10x - 5 = -3
-8x = 2
x = -1/4
y = 2(-1/4) + 1 = 1/2

4 0

3 years ago

3(2x+1)-2(x+1) is the same as

Dahasolnce [82]

Answer:

4x + 1 and 6x - 2x - 2 + 3

Step-by-step explanation:

we can expand and find 2 equations that are the same as this

one being 6x+3 -2x -2

and another being 4x + 1

hope this helps!

5 0