josselynestrada18 josselynestrada18

03-12-2020
Mathematics

contestada

Solve the system of equations by substitution.

3x+y = 10
7x+ 2y= 24

A. (2,4)
B. (2,-6)
C. (4,-2)
D. (2,-4)

If you can, explain step by step please :)

Respuesta :

03-12-2020

Answer:

C

Step-by-step explanation:

3x+y=10---(1)

7x+2y=24---(2)

From(1)

3x+y=10

y=10-3x---(3)

Substitute(3)into(2)

7x+2y=24

7x+2(10-3x)=24

7x+20-6x=24

x+20=24

x=24-20

x=4

Substitute x=4 into (1)

3x+y=10

3(4)+y=10

12+y=10

y=10-12

y=-2

Answer Link

Otras preguntas

What does the word "rung" mean in the poem "The Windhover," in the stanza I caught this morning morning's minion, king -dom of daylight's dauphin, dapple-dawn-

Following an active duty period of 45 days, when must an employee return to work or apply for reemployment?.

Students in Patrice's English class publish an online journal of their reading. Students, parents, and teachers visit the site. Here's the beginning of Patrice'

Find the value of x.

A rotating sprinkler head sprays water as far as 20 feet. the head is set to cover a central angle of . what area of grass will be watered?

Which monomial is a perfect cube

Can someone help pls

The numbers 1, 2, 3, 4, 5, 6, 7, and 8 are arranged to form four two-digit numbers. What is the largest amount of primes that could possibly be among these four

Which phrase best completes this sentence? Es de mala educación ______________________________.

Applying the concept of marginal costs, how would you, as a business owner, decide how much to produce?.