1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
qaws [65]
2 years ago
15

-3x-3y=3 5x+y=-17 Substitution What does x and what does y equal

Mathematics
2 answers:
earnstyle [38]2 years ago
5 0

Answer:

x=-4\\\\y=3

Step-by-step explanation:

Given Equations:

-3x-3y=3      Equation:1

5x+y=-17      Equation:2

Solving Equation:2 for the value of 'y'

5x+y=-17

Subtracting '5x' both sides:

y=-17-5x  Equation:3

Using substitution method:    Put the value of 'y' in equation:1

            -3x-3y=3

        -3x-3(-17-5x)=3\\\\-3x-3(-17)-3(-5x)=3\\\\-3x+51+15x=3\\\\12x+51=3\\\\

Subtracting '51' both sides:

          12x=3-51\\\\12x=-48\\\\x=-48/12\\\\x=-4

Putting the value of 'x' in equation:3

        y=-17-5x

      y=-17-5(-4)\\\\y=-17+20\\\\y=3

The values of 'x' and 'y' are:

        x=-4\\\\y=3

bearhunter [10]2 years ago
5 0

Answer:

Step-by-step explanation:

-3x - 3y = 3 ---------(i)

5x + y = -17

       y = -5x - 17

Substitue y value in equation (i)

-3x - 3*(-5x - 17) = 3

-3x -3*(-5x) -3*(-17) =3

-3x + 15x + 51 = 3

12x + 51 = 3

12x = 3 - 51

12x = -48

x = -48/12

x =-4

Sustitute x value in Equation (i)

-3*(-4) - 3y = 3

12 - 3y = 3

-3y = 3 -12

-3y = -9

y =-9/-3

y = 3

You might be interested in
Three friends, Maria, Sarah, and Ruth, spend $356.50, $365.50, and $356.60,
Likurg_2 [28]

Answer:

Im guessing ruth...

Step-by-step explanation:

not very clear on question

7 0
2 years ago
On a map, 2 1/2 cm represents 60 km. What is the actual distance between two cities that are 5 1/2 cm apart on the map?
lesya [120]

Answer:

They would be 132km apart

Step-by-step explanation:

In order to solve this we need to set up a proportion. To make that easier, let's first change the fractions into decimals.

2 1/2 = 2.5

5 1/2 = 5.5

Now we can put the scale in the right side fraction and the distance in the left.

2.5cm/60km = 5.5cm/xkm

Now cross multiply to solve

60 * 5.5 = 2.5 * x

330 = 2.5x

132 = x

8 0
3 years ago
A tennis supply store pays a wholesaler $90 for a tennis racket and sells it for $144. What is the markup rate
Lilit [14]
The markup rate is $54.00
8 0
3 years ago
The sale price of every item in a store is 85% of its usual price.
Vesnalui [34]

Answer:

25.5

Step-by-step explanation:

85/100*30

25.5

Hope this helps!

6 0
2 years ago
Read 2 more answers
The length of a micrometer is approximately 0.00003937 inch. How would you express this in scientific notation?
Ede4ka [16]
3.937x10^-5 thats the answer..............................

7 0
3 years ago
Other questions:
  • I NEED HELP<br><br><br> cube with 7cm3 sides and the mass is 210g
    10·1 answer
  • Perform the following division: 3 3/4 ÷ 2/8
    14·1 answer
  • The data obtained from a random sample of track athletes showed that as the foot size of the athlete decreased, the average runn
    5·1 answer
  • Is 4.5 a rational number
    8·2 answers
  • Have a question!!! Need help!!!!!! Are these correct???? Or Not????
    5·1 answer
  • Solve each question. Solve for x
    13·1 answer
  • I put a few photos of the questions (20 points)✞
    5·1 answer
  • Select the function that matches the graph.
    12·2 answers
  • What is the quotient?<br> col<br> 3<br> 8<br> 4<br> glot<br> o<br> 32<br> 3<br> o<br> 11 일<br> NI
    12·1 answer
  • Help pleaseeeeeeeeeeeeeeeeeeeeewwwwwk
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!