Hi! There is a lot to answer but I will answer all the questions I can!
I hope this helps!
- When we multiply the variable, we add the exponents
- We multiply to get rid of the brackets
- Once the brackets have been removed, we factor to simplify
Example:
-10x(2x^2 - 4x)
-20x^3 + 40x^2
20x^2(-x + 20)
a) Area = Length * Height
= 4x(5x - 2) = 20x^2 - 8x
b) x = 7 cm
4(7)[5(7) - 2] = 28[35 - 2] = 924 cm squared
c)
i) 4x + 4x + (5x - 2) + (5x - 2)
= 8x + 10x - 4
= 18x - 4
ii) P = 2l + 2w
2(4x) + 2(5x - 2)
8x + 10x - 4
= 18x - 4
d) x = 2
18(2) - 4 = 32
= 32cm
World Problem #2
5x+3y-2 = 2x+4y-3-x+7y-4+s
Find s
s = 5x-x+3y-11y-2+7
s = 4x - 8y + 5
I really hope this helps!!!!
I have to go so I won't be able to answer the rest of the questions today!
I will come back and answer them tomorrow!!! Let me know if you need them ASAP, I could try to make some time.