Answer:
Mine has been good so far
Step-by-step explanation:
C. 84
12 x 8 is the area of the whole thing but you subtract 12 because of the missing 6x2 part of the square
Perhaps it is 31? I just subtracted 180 and 149 so I have no idea if its right.
Answer:
-6 (2 y^2 + 5)
Step-by-step explanation:
Simplify the following:
3 (-y^2 - 2 (5 - y^2)) - 15 y^2
Hint: | Distribute -2 over 5 - y^2.
-2 (5 - y^2) = 2 y^2 - 10:
3 (2 y^2 - 10 - y^2) - 15 y^2
Hint: | Group like terms in 2 y^2 - y^2 - 10.
Grouping like terms, 2 y^2 - y^2 - 10 = (2 y^2 - y^2) - 10:
3 (2 y^2 - y^2) - 10 - 15 y^2
Hint: | Combine like terms in 2 y^2 - y^2.
2 y^2 - y^2 = y^2:
3 (y^2 - 10) - 15 y^2
Hint: | Distribute 3 over y^2 - 10.
3 (y^2 - 10) = 3 y^2 - 30:
3 y^2 - 30 - 15 y^2
Hint: | Group like terms in 3 y^2 - 15 y^2 - 30.
Grouping like terms, 3 y^2 - 15 y^2 - 30 = (3 y^2 - 15 y^2) - 30:
(3 y^2 - 15 y^2) - 30
Hint: | Combine like terms in 3 y^2 - 15 y^2.
3 y^2 - 15 y^2 = -12 y^2:
-12 y^2 - 30
Hint: | Factor out the greatest common divisor of the coefficients of -12 y^2 - 30.
Factor -6 out of -12 y^2 - 30:
Answer: -6 (2 y^2 + 5)
Answer:
108
Step-by-step explanation:
Givens
- let the oldest one = 5x
- Let the youngest one = 3x
- Let the middle one = 4x
Equation
Solution
- 3x + 18 = 5x Subtract 3x from both sides
- 3x - 3x + 18 = 5x - 3x Combine
- 18 = 2x Divide by 2
- 18/2 = 2x/2 Divide
- x = 9
Answer
- 3x = 3*9 = 27
- 5x = 5*9 = 45
- 4x = 4*9 = 36
- The sum is 108
Comment
This is a very tricky problem. It is not the usual way that 3 part ratios are handled. Thanks for posting.
