the Andersons tree farm sells blue spruce trees for $40 and scotch pine for $25 on December 12th they sold 104 trees totaling $3,215. However, Mr. Anderson's son forgot to count how many of each tree was sold. How many trees were scotch pine and how many were blue spruce?

How is working backward similar to solving an equation?

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.

Solve for x in the equation x2 - 12x + 36 = 90. x= 6+3x/10 x=6+2/7 x= 12+3/22 x = 12+3/10