Question

Precle and Problem Solving berdes Practice When eale expression that models each word phrase 10. four more than a number 11. the product of 8 and the sum of a numbers and 3 12. the quotient of the difference between 5 and a number, and 2 Write an algebraic expression that models each situation. 13. Jenny had $130, but she is spending $10 per week 14. The piggy bank contained $25, and $1.50 is added each day. 15. You had 250 minutes left on your cell phone, and you talk an hour a week. See Pre Evaluate each expression for the given values of the variables. 16. a 7b + 3a - 2 + 2a: a = -5 and b=3 17. -*-(3-5)+4 -1 and = -2 18. -5(x+2y + 15x+2y; x=7 and y = -7 19. 4(2 -))-3(2 - ) = -15 and -18 TM Physics The expression 151 models the distance in feet that an object falls during the first seconds after being dropped. What is the distance the object falls during each time? 22.2 seconds 23. 10 second 20 send

i dont understand 13-15 can u explain?

Answer 1

13)

money jenny has = $ 130

spending $ 10 per week

let x is number of weeks

then expression for the situation is written as

130 - 10x

14)

piggy bank has $ 25

and $ 1.50 is added each day

let x is the number of days

so, expression is written as

25 + 1.50x

15)

250 minutes left in cellphone

and you talk an hour a week

1 hour = 60 minutes

let x = number of weeks

250 - 60x