Answer:
9x^2 and -30x
Step-by-step explanation:
Basically, what we want to do is expand out (3x - 5)^2, which is the same as (3x - 5)(3x - 5).
Use FOIL (first, outer, inner, last):
- the first terms are 3x and 3x, so multiply those together: 3x * 3x = 9x^2
- the outer terms are 3x and -5, so multiply those: 3x * (-5) = -15x
- the inner terms are -5 and 3x, so multiply those: (-5) * 3x = -15x
- the last terms are -5 and -5, so multiply those together: (-5) * (-5) = 25
Add all these together:
9x^2 + (-15x) + (-15x) + 25
9x^2 - 30x + 25
The missing terms are thus 9x^2 and -30x.
Answer:
Step-by-step explanation:
So, first we can do 14/4 which is 3.5
Each class uses 3.5 gallons
For (B), we can do 3.5 * 3 which equals 10.5 gallons
For (C), we can do 30÷4 which is 7.5 square feet
For (D) they each paint 1/4 of the wall
120° is the correct answer<span />
Answer:
426 cm^2
Step-by-step explanation:
Let, the area of the given figure be A
Let's imagine that the rectangle (at the bottom right) is present.
Then, A = Area of trapezium - Area of rectangle
= { 1/2 * ( 18 + (20+4) ) * ( 13+9 ) } - ( 4 * 9 )
= 462 - 36
= 426
[If there's any mistake, please inform me]
