robertalfa23ow8xa8 robertalfa23ow8xa8

02-04-2020
Mathematics

contestada

If 5x + 3y = 12 and 4x - 5y = 17, what is y?

Respuesta :

ghanami ghanami

03-04-2020

Answer:

y=-1

Step-by-step explanation:

5x + 3y = 12 ....(*)

4x - 5y = 17....(**)

multiply (*) by : -4 and(**) by 5

you have : -20x -12 = -48.....(1)

20x -25y = 85....(2)

add(1) and(2) : -37y = 37 so : y =37/-37= -1

Answer Link

Otras preguntas

Bairn sells the bowls and plates he makes on his pottery wheel. in which career does he work?

The salesperson in a cell phone store is telling me that the phone I'm considering has 8GB of memory, which means I can save 10,000 photos taken with the phone'

Research studies by psychologist _____ demonstrated that infants acquire object permanence at a much younger age than piaget believed.

how did relationship between europeans and native americans seem to change as more and more europeans came to america. why did spain finance columbus voyage.

evaluate the numeric expression of 2+14x5-5 What is the answer

If you rotate a right triangle, what feature of the triangle changes?

The "stickiness" of water results from the ______________ bonding of water molecules.

Solve and round to the nearest hundredth 24.5= -2.5c - 4c

how did andrew johnson try to treat the southern states

1/4 x less than the sum of 7 and 2x