Use FOIL (First, Outside, Inside, Last)
x(x) = x²
x(9) = 9x
-2(x) = -2x
-2(9) = -18
x² + 9x - 2x - 18
simplify by combining like terms
x² + 9x - 2x - 18
x² + 7x - 18
x² + 7x - 18 is your answer
hope this helps
Y=-1+-3 that is the answer to the question
Answer:
483 feet.
Step-by-step explanation:
Observe the triangle that is given to use. Next you want to find your adjacent, opposite, and hypotenuse of angle A. AB would be considered your adjacent because it is between angle A and your 90 degree angle, your opposite would be CB because it is directly across from angle A and AC is your hypotenuse because it is directly across your right angle.
Now with your given angle you want to use SOH CAH TOA to figure out what to use for this. You are given the length of AB, which is your adjacent. You want to also find the hypotenuse therefore you would use the CAH (Cosine, Adjacent, Hypotenuse).
You would want to then see this as cos(21.3)= with x being your hypotenuse. Now you want to get x by itself so you would then set this up as 450/cos(21.3)=x. Put this in your calculator and it would equate to 482.992 which is rounded off to 483 feet.
Answer: -9, -10 4/9, -10 5/9, -10 8/9, 10 7/9
Step-by-step explanation:
When it comes to negatives I think the smaller the greater. So I arranged them of what is closer to zero, expect the first one because it is positive.
Answer:
2130 cm^3
Step-by-step explanation:
you multiply 71 by 30 and the answer is 2130 with the units as cm cubed which is shown as cm^3