What minus what equals 31

Is algebra hard? What is it

What property is shown in 3x+4y+2+6y+3

Weights of women in one age group are normally distributed with a standard deviation σ of 18 lb. A researcher wishes to estimate the mean weight of all women in this age group.

A bag contains 45 marbles of various colours. Lena draws 48 times, each time replacing the marble before drawing again. She gets a total of 16 red marbles. Which is the best prediction of how many red marbles are in the bag? A) 3 B) 13 C) 15 D) 16

12x + 4y = 152 what represents x and y

Use the following coefficients of a quadratic equation: a=2 b=4 c=-6 What are the solutions to the quadratic equation?

Which pair of equations represents perpendicular lines? a x+2y=8 : 2x-y=-8 b x+2y=8 : 2x+y=8 c x+2y=8 : - x-2y=8 d x+2y=8 : -x-2y=-8

4 * (2.1+3.9) - 7) + 6 * (6.2-4.2) =

Juanita sells homemade jam at the farmers' market. She sold 35 jars during the first hour and 85 jars during the second hour. Write an alegbraic expression to show the number of jars Juanita has left to sell.

What are the common factors of 64 and 120? I'm stuck