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
vichka [17]
3 years ago
11

Solve by substitution

Mathematics
1 answer:
Alekssandra [29.7K]3 years ago
3 0
In second equation add 0.74 and y to both sides: 3.25x+0.74=y;
Substitute y in the first equation: -4.5x-2(3.25x+0.74)=-12.5;
Distribute multiplication over addition:
-4.5x-6.50x -1.48=-12.5;
Combine like terms and add 1.48 to both sides:
-11x= -12.5+1.48;
-11x= 11.02 divide both sides by -11;
X= -11.02/11= -1.00(18)
Y= 3.25• -1.00(18)+.74= -2.515(90)
You might be interested in
An online media service offers video and music downloads. Each download of a song costs $1.50. Each download of a video costs 2
svetoff [14.1K]

Answer:10

Step-by-step explanation:

if a song costs $1.50 and a video is 2 times that amount of a song, then the video would cost $3. you have a balance of $60. you by 15 videos to start. i multiplied $3 by 15 to get the cost of the movies, witch is $45. after i got the cost of the movies i subtracted the $45 from the over all amount, i got 15. now to the songs. i have $15 to get music. 2 songs costs $3( 1.50+1.50= 3.00). 4 songs would cost $6. 8 songs would cost $12. after that i just added 1.50 until i hit a total of 15. so you can get 10 songs for $15

5 0
3 years ago
Helpppoooooppppppp pllalsssssss
kiruha [24]

Answer:

Step-by-step explanation:

A)55 + 12 + 43=110

B) 55+14+40=98

C)55 + 16 +37 =108

HOW MUCH DOSE THE ENTERE THINK NEED TO BE WHAT THE AMOUNT ???

5 0
3 years ago
What is the correct answer
maksim [4K]

Answer:

i actually dont know about any of this im just trying to make this answer 20 characters long

8 0
3 years ago
prism M and pyramid n have the same base area and the same height. cylinder p and prism Q have the same height and the same base
Katen [24]

Answer:

The volume of cone z has the same base area as cylinder y but its height is 3 times the height of cylinder y have the same volume.

Step-by-step explanation:

The volume of a cylinder having base area 'A' and height 'H' is given by  V = AH, and the volume of a cone having the same base area as the cylinder i.e. A and height 3 times the height of the cylinder i.e. 3H is given by V' = \frac{1}{3} A(3H) = AH.

So, V = V'

Hence, the volume of cone z has the same base area as cylinder y but its height is 3 times the height of cylinder y have the same volume. (Answer)

6 0
3 years ago
Andre and Elena are each saving money. Andre starts with $100 in his savings
zysi [14]
Andre’s equation is y = 5x + 100 and Elena’s is y = 20x + 10
Andre - 5x + 100 the x is how many weeks (6) so it’ll be 5(6) + 100 which is 30 + 100 = $130 in 6 weeks
Elena - 20x + 10 same thing x is how many weeks (6) as well so 20(6) + 10 which is 120 + 10 = $130 as well in 6 weeks so therefore, the answer is C.
4 0
2 years ago
Other questions:
  • Which shows the correct simplification of product of powers?
    12·2 answers
  • What is the measure of X?
    14·1 answer
  • Describe a situation that models a linear pattern and then describe a situation that models a nonlinear pattern. Do not state wh
    8·2 answers
  • How do i convert 37/4 into mixed numbers
    5·1 answer
  • the height of a square pyramid is one half the length of each side. the volume of the pyramid is 972in ^3. what is the height of
    7·1 answer
  • Solve for y<br> 1/8y-2/3=5.5
    10·2 answers
  • This is a tough one that I solved, I wanted to see how everyone else solves it.
    13·1 answer
  • 2x+3=4 3x+y=solve by graphing and plz show work
    5·2 answers
  • Select the correct answer.
    11·1 answer
  • 4. Find the following angles(7 points):
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!