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
Sliva [168]
3 years ago
12

Solve the system of equations by substituion, -5x + y = 3 7.5x - 1.5y = 3

Mathematics
1 answer:
Naya [18.7K]3 years ago
5 0
The first equation, make the y as the subject. y = 3 + 5x, then substitute y in the second equation and you will get the value of x. then, substitute the x in the first equation (y = 3 + 5x)
You might be interested in
Can someone help me with this? I'm really confused. Im supposed to be doing a projet, but i don't know how to do it
mr_godi [17]

Answer:

Step-by-step explanation:

the image isnt showing

5 0
3 years ago
How did astronomer Yi Xing (A.D. 683-727) contribute to the development of mathematics in china?
SSSSS [86.1K]

Answer:

Yi Xing invented the astronomical clock and introduced some new methods of interpolation in mathematics.

Step-by-step explanation:

Yi Xing was both an astronomer and a mathematician during the era. He invented the astronomical clock which was more accurate than the initial water and Sun's clock in use.

Furthermore, Yi Xing also discovered some new methods of interpolation in mathematics of which the meaning and interpretation became controversial. Interpolation is a method majorly in mathematics that can be used to estimate a value of a function from its discrete values. It involves first order differences and second order differences.

Also, Yi Xing was able to design a calendar in A.D. 727.

4 0
3 years ago
Miguel is a cartoonist. Miguel drew 2 cartoon cells in 3 hours. If he keeps drawing at the same rate, about how many cells will
Sonja [21]

In three hours Miguel drew 2 cartoon cells . And since he keeps drawing at the same rate, therefore,

in one hour Miguel drew (2/3) cartoon cells .

Hence in 9 hours, Miguel drew (2/3)* 9 = 18/3=6 cartoon cells .

So the answer of the given question is 6 cartoon cells .

4 0
3 years ago
Read 2 more answers
Avery received $80 in cash for mowing lawns. She did the following with the $80. Put 20% of the $80 into a bank account. Spent 1
PolarNik [594]

Answer:

$48

Step-by-step explanation:

To start off, we know that Avery put 20% of the $80 in her bank account. We can figure out how much 20% of 80 is by multiplying 80 by 20% and then subtracting that number from 80. Remember to switch 20% to its decimal form (20% -> .2).

Step 1) 80 x .2 = 16

Step 2) 80 - 16 = 64

Next, we have to figure out how much 1/4 of the remaining $64 would be. We just simply divide 64 by 4 to figure out how much Avery spent.

Step 3) 64 / 4 = 16

Lastly, since we know Avery spent 16 dollars, we can subtract the 16 from 64 to get our final answer.

Step 4) 64 - 16 = 48

8 0
3 years ago
Given that k // I, identify the congruent angles in the
muminat
V 23 is the correct answer
4 0
2 years ago
Other questions:
  • Find all solutions for x(3/x) = (x/12) ? Help please.
    15·2 answers
  • Carol sold twice as many magazine subscriptions as Jennifer. If Carol and Jennifer sold 90 subscriptions in all, how many subscr
    5·1 answer
  • How do you simplify x^2 + 2xy - 3y^2 - y + x?
    11·1 answer
  • Gary exercises 1.75 hours on Mondays, Wednesdays, and Saturdays. How many weeks will it take Gary to exercise a total of 21 hour
    14·1 answer
  • A person who is 70 inches tall cast a shadow that is 54 inches long. If a tree casts a shadow that is 28 feet long at the same t
    5·2 answers
  • I dont understand this but maybe some one will and they will help me. The quotient of a number and -7 decreased by 2 is ten find
    14·1 answer
  • Determine the perimeter of a equilateral triangle with the sides of 28 cm.
    15·1 answer
  • Given thatP(5,4) Q(8,10) and R (X,18) are collinear. Find X
    7·2 answers
  • Sushil, Alex and Peter share some sweets in the ratio 1:1:4. Sushil gets 15 sweets. How many did Peter get?
    9·1 answer
  • HELP IM IN DESPERATE NEED!!!<br> What is the solution to this system of equations?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!