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
murzikaleks [220]
2 years ago
7

How do you solve this?

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

It looks like your equations are

7M - 2t = -30

5t - 12M = 115

<u>Solving by substitution</u>

Solve either equation for one variable. For example,

7M - 2t = -30   ⇒   t = (7M + 30)/2

Substitute this into the other equation and solve for M.

5 × (7M + 30)/2 - 12M = 115

5 (7M + 30) - 24M = 230

35M + 150 - 24M = 230

11M = 80

M = 80/11

Now solve for t.

t = (7 × (80/11) + 30)/2

t = (560/11 + 30)/2

t = (890/11)/2

t = 445/11

<u>Solving by elimination</u>

Multiply both equations by an appropriate factor to make the coefficients of one of the variables sum to zero. For example,

7M - 2t = -30   ⇒   -10t + 35M = -150 … (multiply by 5)

5t - 12M = 115   ⇒   10t - 24M = 230 … (multiply by 2)

Now combining the equations eliminates the t terms, and

(-10t + 35M) + (10t - 24M) = -150 + 230

11M = 80

M = 80/11

It follows that

7 × (80/11) - 2t = -30

560/11 - 2t = -30

2t = 890/11

t = 445/11

You might be interested in
68 more than the quotient of an unknown number and 54 is 72.
Andru [333]
68 + (x / 54) = 72 68 + (x / 54) • 54 = 72 • 54 68 + x = 72 • 54 68 + x = 3,888 68 + x - 68 = 3,888 - 68 x = 3,888 - 68 x = 3,820 I'm pretty sure this is right. Good luck!
4 0
3 years ago
Read 2 more answers
PLZ HURRY IT'S URGENT!!!!!
Salsk061 [2.6K]

Answer:

The correct answer is D) 13%

Step-by-step explanation:

To turn a decimal into a percentage, we simply multiply by 100.

0.13 * 100 = 13%

6 0
3 years ago
Distributive property to factor out the greatest common factor
Bingel [31]
Tttttttttttttttttttttttt
7 0
3 years ago
How can I memorize square roots 1-30?. I got the list from yahoo answers:. . . 1² = 1. 2² = 4. 3² = 9. 4² = 16. 5² = 25. 6² = 36
pshichka [43]
I think the best way in memorizing the roots of numbers 1 - 30 is by through methods that would suitable for you but you must consider is the pattern in each number or the square, every number has it pattern and i know you realized it by now. I hope this would help 
8 0
3 years ago
Hey guys how do I stop crying my favorite teacher left yesterday for five months for the military he always is by my side and he
NeX [460]

Answer:

Step-by-step explanation:

I understand you hardships your going through. I believe you feel like you've lost your best friend, and I have gone through a similar experience when I was in 7th grade.

What I did was I wrote a journal everyday to let my teachers see my English improving day by day (he was my English teacher), because I wanted him to be proud of my progress once he came back.

This made me motivated to see how much time was left for my to see him coming back! I hope this helps.

6 0
3 years ago
Other questions:
  • Explain how the value of the 7 in 327,902 will change if you move it to the tens place
    5·2 answers
  • Ommy Teacher wants to analyze the weights of the students at his school. He knows the weight of the students is normally distrib
    13·1 answer
  • 5 POINTS!!! <br><br> Simplify. <br> 2+x/8x / 3+x/x
    11·1 answer
  • What is the solution to the system of equations Y=-5x+3<br> Y=1
    7·1 answer
  • The inverse of G(x) is a function.<br> A. True<br> B. False
    6·1 answer
  • a garden hose can 1/3 of a pool in 3/4 hour. How much of the pool can the garden hose fill in an hour?
    12·1 answer
  • Kelly was building a bed for her dollhouse. She used her bed, which is 4 feet × 6 feet, as a guide. She scaled down the dimensio
    13·2 answers
  • What are the domain and range of this function?<br><br> PLZ HELP ILL MARK AS BRAINLIEST!!!
    11·1 answer
  • An amusement park has a diameter of 1550 feet and has a circular walking path around the entire park If you walk around the park
    6·1 answer
  • Marco needs $57 to buy new basketball shoes. If Marco earns $3 per day working and already has $12 saved, which equation shows h
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!