(a) 95 = (x+7)*(x-7)
(b) 95 = (x+7)*(x-7)
Expand the brackets:
95 = x² -7x + 7x -49 = x² - 49
Subtract x² from both sides:
95-x² = -49
Subtract 95 from both sides:
-x²=-49-95
-x²= -144
Divide both sides by -1 to get rid of the negative numbers:
-x²/-1=-144/-1
x²=144
Take the square root of 144:
x = ± squareroot of 144
x = 12 or -12
x = 12 because you cannot have a negative age so Trina is 12 years old.
0 - 18 = -18
-18 + 9 = -9 ft
Answer:
(X-3)^2 - 4
Step-by-step explanation:
Changing the h value will move the graph horizontally left or right.
Answer:
v=7
Step-by-step explanation:
i just used a math website for my answers and told it to simplify. try using that website. i always get an 90-100's on my tests from using that
