THe computer scenerio is the second example. It is the second equation because there is a 20$ discount on each computer sold, then a further 10% is taken off (thus making the cost at 90% of the original cost)
0.9(x - 20) = 830
when you solve this you distribute the 0.9 into the brackets (that is times it in)
0.9(x) - 20(0.9) = 830
0.9x - 18 = 830
then add 18 to both sides
0.9x - 18 + 18 = 830 +18
and then you finish and solve for x : )
Here are two stories:
The initial freshman class at a college is 10% smaller than last year’s class. But then during the first week of classes, 20 more students enroll. There are then 830 students in the freshman class.
A store reduces the price of a computer by $20. Then during a 10% off sale, a customer pays $830.
Here are two equations:
0.9x+20=830
0.9(x−20)=830
Decide which equation represents each story.
Explain why one equation has parentheses and the other doesn’t.
Solve each equation, and explain what the solution means in the situation.
5 answers
What does the solution mean
In the equation
Here are two stories: The initial freshman class at a college is 10% smaller than last year’s class. But then during the first week of classes, 20 more students enroll. There are then 830 students in the freshman class. A store reduces the price of a computer by$20. Then during a 10% off sale, a customer pays$830. Here are two equations: a. Decide which equation represents each story. b. Explain why one equation has parentheses and the other doesn’t. c. Solve each equation, and explain what the solution means in the situation.
but t=what is the anwnser
1 answer