<span>x²-x-30=0
factor this equation first
(x-6)(x+5) = 0
x - 6 = 0
x + 5 = 0
x = 6 , x = -5
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P(person has less than a high school education) = 0.12. This is directly from the table.
P(person has at least a bachelors degree: Hard to say for certain, because some of the data in your illustration was cut off.
X is 2 more than y
x=2+y
5 years ago (x-5 and y-5)
sum is 30
x-5+y-5=30
x+y-10=30
x=2+y
sub 2+y for x
2+y+y-10=30
2y-8=30
add 8 to both sides
2y=38
divide both sides by 2
y=19
Lindsey is 19
1/5(x-y) = 1
x+y = 9
x-y = 5 (x5)
x+y = 9
First you want to create both equations so at least one of the variables (x or y) are the same in both equations, so that is why I multiplied the top one by 5, you multiply the whole equation (both sides)
2x = 14
x = 7
Then you either Plus or minus one from the other, I plused the top one onto the bottom one, then solved for x
7 + y = 9
y = 2
Then put x back into one of the first two equations to get Y