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
Mice21 [21]
3 years ago
5

Please help quickly.Thanks :)

Mathematics
1 answer:
Klio2033 [76]3 years ago
5 0
Multiply 2x-5y= -21 by 3 to make it 6x-15y= -63
Multiply 3x-3y= -18 by -5 to make it -15x+15y=90

This cancels the y’s out which leaves us with

6x=-63
&
-15x=90

x for 6x=-63 equals - 10.5 so x is - 10.5 and for -15x=90, x= -6

Then you plug in x into any equation you’d like to find y.

Let’s plug in - 10.5 into 6x... equation.

6(- 10.5)-15y=-63

63-15y= -63
-63 -63

-15y=0
y=0 and x= - 10.5. When you plug in this values it makes the equation true!

But the correct answer is the first one north. Sorry if I’m doing too much hahah


If I’m confusing here’s the right answer...


6x-15y= -63
-15x+15y=90


You might be interested in
Bella earned the federal minimum wage in the year 2008. During that time, she worked 37.5 hours per week. How much money did she
Mariana [72]

Answer:

Belle's weekly earnings per week in 2008: $245.7

Step-by-step explanation:

The federal minimum wage in the year 2008 was: $6.55

She worked 37.5 hours per week.

She earn each week:

weekly earnings = 6.55*37.5=245.7

7 0
3 years ago
Read 2 more answers
A machine can wrap 110 candies per minute. At this production rate, how many candies can the machine wrap in 15 minutes
Gala2k [10]

Answer:

1,650 candies

Step-by-step explanation:

rate: 110 candles per minute

time: 15 minutes

rate x time = work

110 x 15 = 1650

5 0
3 years ago
Read 2 more answers
Jenny rides her bike one mile to school every day. She always stops at Claire’s house on her way. Claire lives ¼ of a mile from
Snezhnost [94]

Answer:

to get our answer, we multiply the two fractions together. 6/8× 3/5= 3/5 or 0.6

hope this helps! mark me brailyest please :D

5 0
2 years ago
Read 2 more answers
Suppose f varies inversely with g and that f = 28 when g = 2. What is the value of f when g = 7?
Lesechka [4]

Make up the proportion

28*2=x*7\\7x=56\\x=8

P.S. Hello from Russia

3 0
3 years ago
Read 2 more answers
A triangle has a perimeter of 31. The longest side is equal to 12. The difference of the other two is 3. What is length of the s
xenn [34]

Answer:

8

Step-by-step explanation:

The perimeter is the sum of the 3 sides of the triangle.

let the other 2 sides be x and x - 3 , then

12 + x + x - 3 = 31

2x + 9 = 31 ( subtract 9 from both sides )

2x = 22 ( divide both sides by 2 )

x = 11 and x - 3 = 11 - 3 = 8

The 3 sides are 12, 11, 8

with shortest side 8

3 0
2 years ago
Other questions:
  • The fraction that name the same amount are
    15·2 answers
  • What is the measurement of the longest line segment in a right rectangular prism that is 26 inches long, 2 inches wide, and 2 in
    15·1 answer
  • sample standard deviation of the breaking strengths of these welds were found to be 94 ksi (thousand pounds per square inch) and
    7·1 answer
  • Will give brainliest
    13·1 answer
  • HELP ME PLeaseee!!!!
    15·2 answers
  • I need help with 11 and 12 I’m not sure
    7·2 answers
  • What’s the answer please??
    15·2 answers
  • Is MNO similar to PQO
    6·1 answer
  • Are 4 and 9 relatively prime?
    6·2 answers
  • In the figure R is between Q and S and S is between R and T . If RT = 15 , RS = 7 , and QT = 18 , find QS
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!