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kondor19780726 [428]
3 years ago
13

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

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ankoles [38]

Answer:

x = 22°

the angles are: 63° and 117°

Step-by-step explanation:

a linear pair of angles total together to be 180°

so:

3x - 3 + 5x + 7 = 180

combune like terms:

8x = 176

divide both sides of the equation by 8:

x = 22°

the angles are: 63° and 117°

7 0
3 years ago
What is the solution of the system of equations? {7/2x−1/2y=9/23x−y=5 Enter your answer in the boxes. ( _ , _ )
dimulka [17.4K]

Answer:

(1, -2)

Step-by-step explanation:

I hope that helps :/

5 0
3 years ago
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(3,-2);slope 1/3 what is the answer?
wolverine [178]

Answer:

y = \frac{1}{3} x - 3

Step-by-step explanation:

The equation of a line in slope- intercept form is

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Here m = \frac{1}{3} , then

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To find c substitute (3, - 2) into the partial equation

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5 0
3 years ago
Tu went to the movies. He bought 2 tickets for $9.50 each, popcorn for $5.00 and 2 drinks for $4.25 each. He gave the clerk two
AnnyKZ [126]

Answer:

A

Step-by-step explanation:

A is the only equation that does not account for the fact that Tu bought 2 tickets and 2 drinks.

The rest do: B subtracts the appropriate amounts twice, C multiplies the doubled expenses, and D does the same, just the amount paid is also separated.

8 0
3 years ago
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Please help.
ddd [48]

Answer:

The\ brother's\ present\ age= 4\ years\\The\ sister's\ present\ age=8\ years

Step-by-step explanation:

Let\ the\ brother's\ present\ age\ be\ x\\Hence\ we\ are\ given,\\His\ sister's\ present\ age=(2x)\\Now,\\The\ brother's\ age\ before\ two\ years=(x-2)\\The\ sister's\ age\ before\ two\ years=3(x-2)\\Also,\\His\ sisters\ age\ before\ two\ years=2x-2\\Hence,\\3(x-2)=2x-2\\3x-6=2x-2\\3x-2x=6-2\\x=4\\Hence,\\The\ brother's\ present\ age= 4\ years\\The\ sister's\ present\ age=2x=2*4=8\ years

6 0
3 years ago
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