Answer:
2/3
Step-by-step explanation:
Ratio means division, so it's 12/18 / 6/6 = 2/3
Answer:
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Answer:on all of them?
Step-by-step explanation:
Answer:
x=3 and x=-5
Step-by-step explanation:
To find the x intercepts set y =0 and solve for x
0 = x^2+2x-15
Factor
What two numbers multiply to -15 and add to 2
5*-3 = -15
5+-3 =2
0 = (x+5) (x-3)
Using the zero product property
x+5=0 x-3 =0
x=-5 x=3
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
