Which of the following is considered as constant?

A. x
B. 5a
C. x-3y
D. 300​

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

Acabinmaker buys 3.5 liters of oat varnish the varnish cost $4.95 per liter what is the total cost of 3.5 liters

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