peter cuts a piece of string into three lengths one is 4.26cm long one is 7.54cm long and the third is 3.90cm long how long was the string before it was cut

15.70cm

Step-by-step explanation:

add to get total

4.26+7.54+3.90

Answer is 15.70cm

15.7 cm

Step-by-step explanation:

The 3 lengths are of 3 strings that used to make up 1 string, so add all 3 lengths to find the length of the string before it was cut.

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.

the answer is -6

step-by-step explanation:

the answer is -6 because its next to the variable m