sophiazjackson sophiazjackson

03-10-2021
Mathematics

contestada

what is the value of x in the solution to this system of equations?
4x + 7y = 85
x = 2y - 5

A) 11
B) 24
C) 6
D) 9

Respuesta :

seetha1980 seetha1980

03-10-2021

Answer:

D) x=9

Step-by-step explanation:

x = 2y- 5

2y = x + 5

y = (x+5) / 2

4x + 7(x+5)/2 = 85

8x + 7x + 35 = 85*2

15x + 35 = 170

15x = 170 - 35 = 135

x = 135/15 = 9

Answer Link

Otras preguntas

10 kg of tea leaves when 3 kg of tea leaves cost $18

Instructions Answer all the questions. 1. What is crucifixion? 2. When was Jesus crucified? 3.Who helped Jesus to carry His cross? 4. In whose tomb was Jesus bu

A square fits exactly inside a circle with each of its vertices being on the circumference of the circle. The square has sides of length x cm. The area of the c

If a friend is hurt you? A. Call 911 B. try to help yourself ( i think B because i know how to treat gun shout wounds, CPR ect. But thats not what adults want u

what would be the effects of a baseball strike

During the mid-1800s, the Indian Territory was reduced as: A. tribes moved to reservations in order to avoid white settlers.B. white settlers claimed the land f

A bicycle lock requires a two-digit code of numbers 1 through 9, and any digit may be used only once. Which expression would determine the probability that both

The perimeter of the isosceles triangle shown is 53 cm. What is the value of x?

18:10 is equivalent to :5

3.5 moles of argon gas are maintained at a temperature of 293K and a pressure of 2.5 atm. What is the volume occupied by the argon gas sample? Value of R = 0.08