4 years ago

Solve system using linear combination. 5x + 3y = 41 and 3x - 6y = 9 show all work.

Mathematics

1 answer:

SVETLANKA909090 [29]4 years ago

7 0

Answer:

(7,2)

Step-by-step explanation:

5x + 3y = 41

3x - 6y = 9

Multiply the first equation by 2

2(5x + 3y) = 41 *2

10x +6y = 82

Add this to the second equation

10x +6y = 82

3x - 6y = 9

----------------------

13x = 91

Divide by 13

13x/13 = 91/13

x=7

Now we can find y

5x+3y = 41

5(7) +3y =51

35+3y=41

Subtract 35 from each side

35-35+3y=41-35

3y = 6

Divide by 3

3y/3 = 6/3

y=2

You might be interested in

(X^3-3x^2+5x-3)/ (x-1)

Arte-miy333 [17]

Answer:

x^2-2x+3

Step-by-step explanation:

8 0

3 years ago

A runner is preparing for a marathon that is cut into 5 equal sections. The marathon is 42.95 kilometers long. How long is each

Lisa [10]

Your answer is 21.475km

5 0

3 years ago

Read 2 more answers

PLEASE ANSWER ASAP!!!

qwelly [4]

Answer:

D, E

Step-by-step explanation:

It’s not A because the equation can not be any pair of numbers.

It’s not B because that is stupid logic.

It’s not C because (3,4) and (10,8) don’t work

It’s not F because there is 1 solution

5 0

4 years ago

mr.montes is a plumber. he charges $35 to evaluate the situation plus $42 per hour that he is working on the job. if he were to

svet-max [94.6K]

You have to multiply 42x60 then add it to 35 then subtract the answer minus 10. Then multiply 60x5. Lastly you get both answers and add them I hope this is right

4 0

4 years ago

Solve for x. x/6 = 10<br> x = 4 <br> x = 10 <br> x = 16 <br> x = 60

notsponge [240]

1=6/6

10* 6/6 = 60/6

x= 60

8 0

3 years ago