How are expressions 1/4 of 12 and 12 divided by 4

Mathematics

1 answer:

Radda [10]2 years ago

8 0

0 is the awnser —————-1————-

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17 points: Answer the question in the picture provided. Please hurry.

KatRina [158]

PEMDAS
yo might be tricked to do 2(-7) but that's multiplcation

so expoments
(-6)^2=36

now we have
36/12-2(-7)
mulitipictioan or division whicever comes first
division
36/12=3
multiplcation 2(-7)=-14
now we have
3-(-14)
3+14
17
answer is 17

8 0

3 years ago

How many ounces of 50% alcohol solution must be mixed with 80 ounces of a 20% alcohol solution to make a 40% alcohol solution?

Paraphin [41]

X = amount of 50% solution
y = total amount after mixing

Note that the amount of alcohol in the 20% solution is 80 (0.2) = 16 oz.

We have 2 unknowns, so we need 2 equations:
first, we can write the equation for the total volume:
y = x + 80

next, apply the percentages to get an equation for the amount of alcohol:

0.4 y = 0.5 x + 16

Finally, solve the pair of equations (in this case, by substitution of the 1st into the second:
0.4 (x + 80) = 0.5x + 16
0.4 x + 32 = 0.5X + 16
rearrange and combine like terms:
0.1x = 16
x = 160
from the 1st equation:
y = 160 + 80 = 240

8 0

2 years ago

Please Help!

Marina CMI [18]

Answer:

Letter:C

Step-by-step explanation:

#CARRY ON LEARNING

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3 years ago

Evaluate 2/ 3 ÷ 4 /5 Give your answer as a fraction in its simplest form.

gulaghasi [49]