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
Katen [24]
3 years ago
11

X=2y-47x+5y=-66 what is the x- value​

Mathematics
1 answer:
Gwar [14]3 years ago
5 0

Answer:

x = -8

Step-by-step explanation:

x = 2y - 4 --- Equation 1

7x + 5y = -66 --- Equation 2

I will be using the substitution method to solve this.

Substitute x = 2y - 4 into Equation 2:

7x + 5y = -66

7(2y - 4) + 5y = -66

Evaluate.

14y - 28 + 5y = -66

Evaluate like terms.

19y - 28 = -66

Isolate 19y.

19y = -66 + 28

     = -38

Find y.

y = -38 ÷ 19

y = -2 --- Equation 3

Substitute y = -2 into Equation 1:

x = 2y - 4

x = 2(-2) - 4

Evaluate.

x = -4 - 4

x = -8

You might be interested in
What would be the final elevation if a moth is flying at at 9 meters above the ground and changes by -4?
quester [9]
5 because this is equivalent to 9-4 which is 5 meters, this is because he is going up 9 and then goes down 4, do 9-4, which is 5
6 0
3 years ago
A video game has five stages. If Will beat 4/5 of the stages, what percent of the game has he finished
fiasKO [112]

Answer:

75%

Step-by-step explanation:

1 = 10%

2 = 25%

3 = 50%

4 = 75%

5 = 100%

5 0
2 years ago
If the cost to the store is $20 and the selling price is $32 what is the markup?
nata0808 [166]

Answer:

60%

Step-by-step explanation:

It went up 12 dollars, and you need to find how much 12 is of 20 as a percent. You do 12/20 times 5/5 and get 60/100, so 60% markup

5 0
3 years ago
Read 2 more answers
Tickets to a concert cost $70, or $20 with a student discount. Ticket sales must exceed $500,000 for the group to perform. If 20
Angelina_Jolie [31]

Solution:

Let x = the number of $70 seats sold

Let y = the number of $20 seats sold

x+y ≤ 20,000

70x+20y > 500,000

4 0
3 years ago
Read 2 more answers
Which of the following graphs best represents f(x) = −2 sin(4x) + 3?
Artist 52 [7]
The graph for f(x) = sin x <span>is a sinusoidal graph.

</span>f(x) = 2 sin 4x
has an amplitude of 2 or the highest point is 2 and a period of
Period = 3π/4 = π/3
f(x) = 2 sin 4x + 3
<span>the graph is shifted 3 points upward. </span>
3 0
3 years ago
Other questions:
  • Please help <br><img src="https://tex.z-dn.net/?f=1.488%20%20%5Cdiv%202.1" id="TexFormula1" title="1.488 \div 2.1" alt="1.488
    5·1 answer
  • How do you do a unit rate?
    9·1 answer
  • The 3rd term of the sequence is 13. The 8th term of the sequence is 38. What is the position-to-term rule.
    10·1 answer
  • 7n−4=31, n, minus, 4, equals, 31<br> n =n=n, equals
    8·1 answer
  • Solve the system by using elimination 3x+3y=-9 3x-3y=21
    9·2 answers
  • Nicole tutors history. For each hour that she tutors she earns 50 dollars. Her earnings, (E) in dollars, after tutoring for (h)
    10·1 answer
  • What is the degree of the polynomial 9m4−4m3+8m−5
    5·1 answer
  • . The product of 3V5 and 6v5 is
    15·1 answer
  • Fill in the blank with the correct response.<br> 3<br> of a =<br> then I<br> 5<br> 24
    12·2 answers
  • Taxi Cab Company B: $6.50 per ride and $0.50 per mile
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!