1. Twenty-one is equal to the sum of two x's plus nine and four tenths. What is x?

Medium sodas cost $1.25 and hot dogs cost $2.50. natalie’s group brought in pizzas but is buying the drinks at concession stand. how many medium sodas can natalie’s group buy with $20? make a table to show answer.

What number must you add to complete the square x^2+12x=16

What is the measure of one interior angle of a pentagon