Solve the system of equations -2x+y=5 x-3y=-30

1 answer:

5 0

-2x+y=5
x-3y=-30 so you can multiply the bottom equation by 2 you'll get 2x-6y=-60

-2x+y=5
2x-6y=-60 And subtract the equations. You'll get -5y=-55 y=11. Plug it in to one of the original equations. -2x+(11)=5
-2x=-6 so x=3

y=11 and x=3

You might be interested in

I am completely stumped...

Nana76 [90]

Answer:

x=25 $\sqrt{2}$

Step-by-step explanation:

the hypotenuse is equal to a leg times the square root of 2. which means to find the leg with the hyp given. you take $\frac{50}{\sqrt{2} }$ which then translates to 50 root 2/2=x therefore 25 $\sqrt{2}$

7 0

4 years ago

Function for the given x value f(x)=x-3, x=-2

Vitek1552 [10]

Answer:

Step-by-step explanation:

7 0

4 years ago

computer desks can be purchased for $10.90 a dozen or in case of 60 $80 a case. Use unit prices to tell which prices is the best

Natalija [7]

The <u>correct answer</u> is:

The better deal is $10.90 for a dozen.

Explanation:

A <u>unit rate</u> is a rate with a denominator of 1. This means we want to know the price of one individual desk for each bulk package.

$10.90 for a dozen desks:
Divide 10.90 by 12:
10.90/12 = 0.9083 ≈ $0.91 per desk.

$80 for 60 desks:
Divide 80 by 60:
80/60 = $1.33 per desk.

The lowest cost per desk is in the $10.90 for a dozen deal.

7 0

3 years ago

Please help me out :)

Sonja [21]

Answer:

90 km an hour.

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

2 over n minus 2n equals o

WINSTONCH [101]

Two answers are n being 0 or 2.

~~

I hope that helps you out!!

Any more questions, please feel free to ask me and I will gladly help you out!

~Zoey

5 0

3 years ago