You add the equations together making sure one of the variables disappears by making one negative and one positive. In this situation y would alrady disappear 8x+y=-16
The correct answer is 2520
5 x 7 x 3 x 3 x 4 x 2 = 2,520
Let's convert the word descriptions into mathematical equations first for illustration.
f(x) = x^2 - x - 12
g(x) = -2.5x - 2
Then, we equate g(x) and f(x). The final equation becomes
x^2 - x - 12 = -2.5x - 2
Then, we simplify by transposing and combining like terms.
x^2 - x + 2.5x -12 + 2 = 0
x^2 + 1.5x - 10 = 0
Since this is a quadratic equation, we find the roots by using the quadratic formula
where a = 1, b = 1.5 and c=-10
Thus, the answer is x = 2.5, -4.
623 is close to 650 so you round that up to 650 and 0.67 is rounded to 0.65
650 x 0.65 = 422.5
Round 422.5 = 420
Your welcome :)
I'm pretty sure he would be 5 ft 3 in. tall.
