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
tester [92]
2 years ago
8

— 4х + 7y = 20 у = 3х + 15

Mathematics
1 answer:
Angelina_Jolie [31]2 years ago
6 0

Answer:

x=-5

Step-by-step explanation:

-4x+7(3x+15)=20\\ -4x+21x+105=20\\ 17x+105=20\\ 17x=20-105\\ 17x=-85\\ x=-5

You might be interested in
Multi-step K is the midpoint of JL, JL=4x-2, and JK=7. Find x, KL, and JL
ddd [48]
If K is midpoint of JL then JK = 0.5JL

JL = 4x - 2; JK = 7

The equation:
0.5(4x - 2) = 7
2x - 1 = 7      |add 1 to both sides
2x = 8        |divide both sides by 2
<u>x = 4</u>

<u>JL</u> = 4(4) - 2 = 16 - 2 = <u>14</u>

<u>KL</u> = JK =<u> 7</u>
7 0
3 years ago
What is the answer to 10 to the 2nd power times 5/2 is ?
katrin2010 [14]
Answer: 250
10 times itself or 10^2 = 100
(100)(5)=500
500/2= 250
5 0
3 years ago
HELP ME WITH THIS IM DESPERATE!​
Oliga [24]

Answer:

i dont know but i think its 50

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Simplify each expression<br>4sg/-5g<br>and<br>(8 + 7a) + 4
Yanka [14]

\dfrac{4sg}{-5g}=-\dfrac{4}{5}\cdor\dfrac{sg}{g}=-\dfrac{4}{5}s\\\\(8+7a)+4=7a+(8+4)=7a+12

5 0
2 years ago
HELP MIDDLE SCHOOL QUESTION
tangare [24]

Answer:

the answer is 5.5 thank me later

4 0
3 years ago
Read 2 more answers
Other questions:
  • Can someone help me immediately on this question having to do with triangle ABC?
    12·1 answer
  • 108. The area of a rectangle is 40 square units. The length of the rectangle is 10. Write an equation that could be used to find
    11·1 answer
  • Why is it important to keep two sides of an equation balanced when solving?
    8·1 answer
  • Evaluate 15 divide by k when k = 3
    10·2 answers
  • Y = x – 6
    8·1 answer
  • Does a trapezoid have exactly one pair of congruent sides sometimes, always, never
    14·2 answers
  • Ben is paid £9.60 per hour.
    10·2 answers
  • If f(x)=4x+10, find f(2)
    8·1 answer
  • 18. Find the length of the segment indicated. Round your answer to the
    14·2 answers
  • The following set of ordered pairs represents y as a function of x.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!