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
Korolek [52]
2 years ago
7

If 3m = 19 - n and 2m + 5n = 30, then what is the value of m?

Mathematics
1 answer:
nexus9112 [7]2 years ago
8 0

Answer:

m=5

Step-by-step explanation:

We can solve this by using a system of equations. The easiest way to solve this is by using substitution.

3m=19-n       Subtract both sides by 19 to find n.

<u>-19  -19</u>

3m-19=-n      Divide everything by -1 to make n positive.

<u>/-1        /-1</u>

n=-3m+19

Now, we can substitute n into the second equation.

2m+5(-3m+19)=30    Substitute (-3m+19) into n.

2m-15m+95=30       Simplify.

-13m+95=30              Simplify and subtract both sides by 95.

        <u>-95 -95</u>

-13m=-65                    Divide both sides by -13.

<u>/-13    /-13</u>

m=5

We don't need to solve for n at all, so that is the answer!

Hope this helps, and have an amazing day ♥

You might be interested in
Jim is able to sell a hand-carved statue for $670 which was a 35% profit over his cost. How much did the statue originally cost
n200080 [17]
A)496.30, hope this helped
7 0
3 years ago
HELP PLZ! BRAINLIST WILL BE PICKED!
fomenos

Answer:

-0.9

Step-by-step explanation:

hope this helps lovely! lmk if you need an explanation!

3 0
3 years ago
One number is 2 less than 3 times another. If the sum of the two number is 14, find the numbers.One number is 2 less than 3 time
Serga [27]

Answer:

Step-by-step explanation:

One number is 2 more than 3 times another. Their sum is 14.Find the numbers. 8, 14 5, 17 2, 20 4, 18 10, 12

7 0
2 years ago
Which postulate or theorem proves that these two triangles are
kirill115 [55]

Answer:

AAS Congruence Theorem

4 0
3 years ago
Bone-shaped treats are 5 for $3.50 at Shelley's store and Sarah wants to buy 12. She set up and solved this proportion to find h
Molodets [167]

Answer:

Her error was multiplying numerator by numerator ( that is Quantity of Bone-shaped treats)

Step-by-step explanation:

Sarah's calculation

Let

x = cost of 12 Bone-shaped treats

Quantity of Bone-shaped treats : price

5 : 3.5 = 12 : x

(5/3.5) = (12/x)

Cross product

3.5x=60 (Here is her error)

x=17.14

Correct calculation

Quantity of Bone-shaped treats : price

5 : 3.5 = 12 : x

5 / 3.5 = 12 / x

Cross product

5 * x = 3.5 * 12

5x = 42

x = 42 / 5

= 8.4

x = $8.4

Her error was multiplying numerator by numerator ( that is Quantity of Bone-shaped treats)

Instead of multiplying Quantity of Bone-shaped treats by cost

7 0
3 years ago
Read 2 more answers
Other questions:
  • How many calories are in 3/4 cup of honey
    10·1 answer
  • Solve the inequality:2y-2&lt;14
    6·1 answer
  • Is twenty-five hundreths 2,500 ?
    5·1 answer
  • NEED HEPL PLEASE !!!!
    5·2 answers
  • Khan academy circles unit test
    5·1 answer
  • Sandra wants to rent a car to take a trip and has a budget of $90. There is a fixed rental fee of $30 and a daily fee of $10. Wr
    15·1 answer
  • Five less than the product of 3 and a number
    12·2 answers
  • Not sure which one it is
    6·1 answer
  • SOME HELP ME PLS. I WILL MARK U BRAINLIEST
    11·1 answer
  • Find the total surface area of this cuboid.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!