Question

1. a rectangle has side lengths (x + 5) meters and (2x - 1) meters. write an expression in simplest form that represents the perimeter of the rectangle.

my answer is 6x + 4

2. find the sum and difference:
2(3x - 4) + (2x - 5) = 8x - 13
2(3x - 4) - (2x - 5) = 8x + 13

3. while catching fireflies, you and a friend decide to have a competition. after m minutes, you have (3m + 13) fireflies and your friend has (4m + 6) fireflies.
a. write an expression that represents the number of fireflies you and your friend caught together.
7m + 19
b. the competition ends after 5 minutes. who has more fireflies?
3(5) + 13 = 28
4(5) + 6 = 26
i'd have more fireflies.

Answer 1

1. 2(x+5) + 2(2x-1) = 2x+10 + 4X -2 = ?

2. First one right.
6x-8 - 2x + 5 = ?

3. Right