Write an expression for the perimeter of the triangle shown below:
lengths are 2.3x + 14, -0.2x + 15,2x
a 4.1x + 29
b 4.1x - 29
c 4.5x + 29
d 4.5x - 29

When you arrive at the lake, your friend realises he hasn’t got any swimming trunks. you need to ride to a sports shop. the sports shop is 8350 metres away. how many metres is it to cycle there and back?

Need solving this second acceleration problem.

The jewelry store is having a sale. necklaces that were regularly priced at $23.50 are on sale for $18.80. what is the percentage of decrease in the price of necklaces?