A triangle has sides with lengths of 4 meters , 5 meters, and 7 meters . Is it a right angle ?

Which expression is equivalent to the expression shown?

Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)