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
Ad libitum [116K]
2 years ago
14

3x + 3y =-18 and y=2x solve by substitution, show work.

Mathematics
1 answer:
Ber [7]2 years ago
4 0

Answer:

x=-2

Step-by-step explanation:

3x+3*2x=-18

3x+6x=-18

9x=-18

x=-2

You might be interested in
In a right angle,the altitude to a 6ft hypotenuse.Find the length of the altitude and each leg.
Nuetrik [128]

Answer:a=3.6 and b=4.8

Step-by-step explanation:(a^2)+(b^2)=(c^2)

Where c is hypotenuse is equal to 6. A right triangle is also known as a 3,4,5 triangle where the 2 legs are 3 and 4 and hypotenuse is 5. Find the factor in size difference by dividing your hypotenuse of 6 by the hypotenuse of 5 you get 1.2. Now multiply the 3 and 4 by 1 2 to get your answers of 3.6 and 4.8.

To check work simply plug in your legs as a and b

(3.6^2)+(4.8^2)=(6^2)

(12.96)+(23.04)=(36)

6 0
4 years ago
HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
svetoff [14.1K]

Answer:

t=30

Step-by-step explanation:

6 0
3 years ago
The length of a rectangle is five times its width. If the perimeter is at most 96 centimeters, what is the greatest possible val
Dvinal [7]

Let width be W


Then length = 5W

P=2L+2W

P< 96cm

Then the Perimeter  of the rectangle is equal to

(2L+2W)< 96

2*(5W)+2W)≤96


Therefore, 2w+2⋅(5w)≤96


should be your answer


8 0
4 years ago
What is the standard form of 3+5x-4x^2<br>and what is the standard form of 8x+x+5+x^3​
harina [27]

Answer:

1. -4x^2 + 5x + 3

2. x^3 + 9x + 5

Step-by-step explanation:

hope this helps

4 0
3 years ago
How to find the unknown variable of q-13=-13
Lelechka [254]

You add 13 to each side of the equation.
Then the equation says  ' q = 0 ', and
you immediately recognize that as its
solution.
7 0
3 years ago
Other questions:
  • Four sisters bought a present for their father. They recieved a 10% discount on the original price of the gift. After the discou
    8·1 answer
  • What is the equation of the quadratic graph with a focus of (3, 4) and a directrix of y = 8? 99 pts!
    12·2 answers
  • HELP ASAP FOR BRAINLIEST
    5·2 answers
  • Assuming that the laptop replacement times have a mean of 3.7 years and a standard deviation of 0.4 years, find the probability
    12·1 answer
  • You pay $11.20 to buy drink boxes for the football team. Each drink box cost $0.40. How many drink boxes did
    7·1 answer
  • Choose the correct math expression for: 36 minus the quotient of a and 4.
    14·1 answer
  • 9 - (-8) • 3<br> Order of Operations
    5·2 answers
  • Beck finished 30% of his homework in 12 minutes. How many minutes will it take him to complete all of his homework?
    8·1 answer
  • The perimeter of a rectangle is 84cm.
    12·1 answer
  • Please simplify and keep the answer with exponents.<br><br> (6^7 * 6^12)/ 6^8
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!