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mixas84 [53]
3 years ago
14

−9x+4y=6 ​ 9x+5y=−33 ​​

Mathematics
1 answer:
koban [17]3 years ago
8 0
For the first one x=2 and y=6
for the second one if you can use fractions x=-1/3 and y=6
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Solve 1/5x+3=10. Show all work and check it
iren2701 [21]
1/5x + 3 = 10

Subtract by 3 on both sides. 

1/5x = 7.

Now to isolate the variable, flip the coefficient in front of the variable and multiply both sides by it. 

5(1/5x) = 7(5)

x = 7(5)
x = 35

Now to check:

1/5(35) + 3 = 10

35/5 + 3 = 10

35/5 is 7.

7 + 3 = 10

10 = 10
5 0
3 years ago
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(6 – 4i) (6 + 4i)<br> simplify using imaginary numbers
melamori03 [73]

Answer:

52

Step-by-step explanation:

7 0
3 years ago
Need help 10 points
grin007 [14]
The radius is 2 and area = r^2*pi so 4*pi gives you 12.56 so the exact answer would be 12.56 and the answer with pi would be 4 times 3.14!
8 0
2 years ago
7 cm and the length of the larger square is 12 cm
Katyanochek1 [597]
The size ot the "larger square" is 5cm
8 0
3 years ago
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Bruce wants to make 50 ml of an alcohol solution with a 12% concentration. He has a 10% alcohol solution and a 15% alcohol solut
Inessa05 [86]

The equation is 0.1x + 0.15(50-x)=1.20(50)

Step-by-step explanation:

Here you need 50ml of 12% alcohol solution.

You have 10% and 15% alcohol solutions.

Take volume of 10% alcohol solution to be x ml

Take volume of 15% alcohol solution to be y ml

Form equations;

x+y=50 ml--------------------------equation 1

0.1x +0.15 y= 12% of 50

0.1x+0.15y=6-----------------------equation 2

Now you have simultaneous equations, use a graph tool to solve for values of x and y as attached.

or use the mixture equation the get value of x

0.1x + 0.15(50-x)=1.20(50)

The values of x and y are ;

(x,y) (30,20) which means;

y is 20 ml of 15% alcohol

x is 30 ml of 10% alcohol

Learn More

  • brainly.com/question/2405496

Keywords : concentration, mixture

#LearnwithBrainly

5 0
3 years ago
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