4.
a square field had 5 m added to its length and 2 m added
to its width. the field then had an area of 130 m. find the
length of a side of the original field.

Anumber cube is rolled and a coin is tossed. the number cube and the coin are fair. what is the probability that the number rolled is less than 4 and the coin toss is tails?

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of

What is the value of x? enter your answer in the box. x =