Simultaneous Equations 1.x-3y+1 = 0
x^2 -3xy + y^2 =11

2. 3^x = 9^(y-1)
x^2 - y^2 = 7

3. 10 + x^2 > x(x-2)

4. (a) 6x - 7 < 2x + 3
(b) 2x^2 - 11x +5 < 0
(c) both 6x - 7 < 2x +3 and 2x^2 - 11x + 5 < 0

c. 6tan80

step-by-step explanation:

inverse property is the answer

step-by-step explanation:

answer is 1

step-by-step explanation:

8.75

how-to:

first, we need to find what we have to work with.

since i know that we have 7 (years) and 0.8 (inches), we can use these to solve and find the equation!

secondly, what you want to do, is see that we need to know how much growth out of the 0.8 inches he got in only 1 year, instead of 7 years.

let's try to divide.

7 ÷ 0.8 = 8.75