Question

What is the solution set of 4x = y and 2x2 − y = 0?

{(0.5, -0.5), (2, -8)}

{(0, 0), (2, 8)}

{(1.5, 2), (8, 2)}

{(-1.5, -2), (2, 8)}

Answer 1

substitute for y in the second equation, since it's already isolated in the first eq'n.

2x^2 - (4x) = 0

2x (x - 2) = 0

set the "brackets" = 0.

2x = 0, therefore x=0
x-2=0, therfore x=2

Answer 2

the 2x2 (the last 2 is squared)

Answer 3

\[2*2^{2} \]

Answer 4

Yes like that

Answer 5

I dont get what you said @Nerd94

Answer 6

X=0 and X=2

Answer 7

x=0 y=2

Answer 8

Oh so its B?

Answer 9

yes

Answer 10

Thats right! Thanks

Answer 11

no problem

Answer 12

gotta retake it tho so i still need help

Answer 13

ok

Answer 14

An archway is modeled by the equation y = -2x2 + 8x. A rod is to be placed across the archway at an angle defined by the equation x − 2.23y + 10.34 = 0. If the rod is attached to the archway at points A and B, such that point B is at a higher level than point A, at what distance from the ground level is point B?

Answer 15

all the ???????? is meant to be a minus/subtraction sign (-)

Answer 16

8 units

6 units

5 units

3 units

Answer 17

@Junie.Michell98

Answer 18

@Nerd94

Answer 19

if Im not mistaken i should be 8 units

Answer 20

8 units

Answer 21

It was wrong

Answer 22

oh im sorry

Answer 23

gotta get the next 4 right or i fail again

Answer 24

A fountain on a lake sprays water in a parabolic arch modeled by the equation
y = −0.4x2 + 3x, where y is the height in feet and x is the horizontal distance. A beam of light is passed through the fountain to create a rainbow effect. If the beam is directed at an angle modeled by the equation -2.2x + 4.9y = 8.18, at what distance from the ground will the beam first touch the water spray?

Answer 25

the answer choices...


0.6 feet

2 feet

4.2 feet

5.6 feet

Answer 26

@Demonx341

Answer 27

hello

Answer 28

help with question above

Answer 29

ok

Answer 30

@iGreen will u explain how to do this to @SavannahPaige18 ??

Answer 31

sorry but i dont know how to do this that is why i asked igreen.

Answer 32

Okay

Answer 33

@Nerd94

Answer 34

4.2 ft.

Answer 35

It was wrong

Answer 36

What is the solution set of y = x2 + 2x + 7 and y = x + 7?

{(0, 7), (-1, 6)}

{(0, 7), (-7, 0)}

{(0, 7), (1, 8)}

{(-2, 0), (4, 0)}

ITS NOT B****