Answer:
The answer is 6,992 :)
Step-by-step explanation:
X-4y=7 Answer:1/4
2x+y=5
2x+y=5 I am not sure but I’m pretty sure the answer is -2
remember, you can do anything to an equation as long as you do it to both sides
we can do a subsitution
y=x+6
y=-7x-10
since y=x+6, we can subsitute x+6 for y in the other equation
y=-7x-10
x+6=-7x-10
add 7x to both sides
8x+6=-10
minus 6 from both sides
8x=-16
divide both sides by 8
x=-16/8=-2
the valu eof x that satisfies both equations is x=-2
Answer:
see below
Step-by-step explanation:
2x^2 +2x > -4
Add 4 to each side
2x^2 +2x+4 > -4+4
2x^2 +2x+4 > 0
Factor
2(x^2 +x+2) >0
Divide by 2
2/2(x^2 +x+2) >0/2
(x^2 +x+2) >0
Complete the square
Take the x coefficient divide by 2 and square it
(1/2) then square it = 1/4
(x^2 + x +1/4) +7/4 >0
(x+1/2)^2 +7/4 >0
Subtract 7/4 from each side
(x+1/2)^2 +7/4 -7/4>0-7/4
(x+1/2)^2 >-7/4
This is always true since a quantity squared is greater than a negative quantity
x can be any number
Answer:
-18
Step-by-step explanation: