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slava [35]
3 years ago
8

Check each solution. Number 11

Mathematics
1 answer:
-BARSIC- [3]3 years ago
4 0
Y=5 =D!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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Plz help with this word problem
Andreyy89
He will mix some 20% solution and some 70% solution to make 60% solution.

Let x = number of liters of 20% solution.
Let y = number of liters of 70% solution.

He wants to make 50 liters of 60% solution, so

x + y = 50   First Equation

The amount of acid in x amount of 20% solution is 20% of x, or 0.2x
The amount of acid in y amount of 70% solution is 70% of y, or 0.7y
The amount of acid in 50 liters of 60% solution is 60% of 50 liters, or 0.6 * 50 = 30
Now we add the amounts of acid.
0.2x + 0.7y = 30   Second Equation

x + y = 50
0.2x + 0.7y = 30

-0.2x - 0.2y = -10
0.2x + 0.7y = 30
------------------------
           0.5y = 20

y = 40

x + y = 50

x + 40 = 50

x = 10

Answer: He needs 10 liters of 20% solution and 40 liters of 70% solution.
4 0
3 years ago
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Determine the x- and y-intercepts for the two lines below and then use them to graph each line.
zavuch27 [327]

Answer:

a. x - 2y = 4

Step-by-step explanation:

carry on learning

7 0
3 years ago
Please help me due today
Kaylis [27]

Answer:

the first three are the answer

Step-by-step explanation:

5 0
3 years ago
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PLSSS HELP IMMEDIATELY!!!!!!! only answer if u know. i’ll be giving brainiest if u don’t leave a link.
podryga [215]

Answer:

1. isosceles because two of the sides are equal

2. right because there is a right angle

Step-by-step explanation:

7 0
2 years ago
Find the measure of angle A
Ray Of Light [21]
In the fist you have to know: a<span>ny angle opposite the head is equal in measurement.
so now we know o</span><span>ne angle in the triangle it is 82
</span><span>All corners of the triangle are equal 180
</span>so we have to do this 180-82=98
so we have to collection (4x+8)+(8x-6)=98
12x+2=98
12x=96
x=8
4(8)+8=40
the answer is 40
<span><span><span>
</span></span></span><span><span>
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8 0
2 years ago
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