peytongregory94 peytongregory94

11-02-2021
Mathematics

contestada

What is the y-coordinate of the solution to this system of equations?
5x-8y=1
3x+6y=-21

Respuesta :

11-02-2021

5x-8y=1...(1)
3x+6y=-21...(2)

(1)*3:
15x-24y=3...(3)

(2)*5:
15x+30y=-105...(2)

(3)-(2):
15x-24y-(15x+30y)=3-(-105)
15x-24y-15x-30y=108
-54y=108
y=-2

Answer Link

Otras preguntas

the diagram below shows one atom transferring an electron to another atom what type of bond is this

a small boy jumps off the high drive and it takes 2.5 seconds for the boy to hit the water. The boy does 500 joules of work falling to the water?

Heyy can you help me fill in the blanks? Thank youuuu

upon admission, the nurse should give priority to addressing which need of a client who is displaying symptoms of dysfunctional grief?

An arithmetic sequence k starts 12, 9, . . . a. Write a recursive definition for this sequence.

for a typical person, the average number of breath cycles per minute during a very relaxed state is:

The public health impact of sleep deprivation is most clearly seen in: ________

Explain what are two factors that determine the thermal energy of a substance

Discuss how the increasing prison budget impacts society at large, including education and other services that depend on state and federal budgets.

pls help urgent! Solve for the roots in simplest form using the quadratic formula: x²-16x = -100