Test PracticeT
234 Equations and InequalitiesC 30. CHALLENGE Refer to Exercise 29. Is there a temperature in the table at
which the number of degrees Celsius is the same as the number of
degrees Fahrenheit? If so, find it. If not, explain why not.- CHALLENGE Suppose your school is selling magazine subscriptions. Each
subscription costs $20. The company pays the school half of the total sales
in dollars. The school must also pay a one-time fee of $18. What is the
fewest number of subscriptions that can be sold to earn a profit of $200? - E WRITE MATH When solving an equation, explain why it is important
to perform identical operations on each side of the equals sign.
ALGEBRA Solve each equation. Check your solution. (Lesson 2D)- 21 f = 43 36. - ^34 y = - 1615 37. 53 p = 12 38. 1211 = _ 1311 n
- E-CARDS The prices for E-cards are shown.
Seth’s grandmother spent $22.75 on song E-cards.
How many song E-cards did she send? Write and
solve an equation. (Lesson 2B)
Solve each equation. Check your solution. (Lesson 1D)- 15 - x = 19 41. x + 5 = - 24 42. - 13 = x - 8 43. - 4 = x + 20
33. A rental car company charges $30 a day
plus $0.05 a mile. This is represented by
the equation below, where m is the
number of miles and c is the total cost of
the rental.
c = 30 + 0.05mIf the Boggs family paid $49.75 for their car
rental, how many miles did they travel?
A. 95 miles C. 295 miles
B. 195 miles D. 395 miles- GRIDDED RESPONSE The Rodriguez
family went on a vacation. They started
with $1,875. They spent $140 each day
and have $895 left for the rest of their
trip. Use the equation below to find d,
the number of days they have been on
their vacation so far.
1,875 - 140 d = 895How many days have they vacationed?228_239_C04L3_895130.indd 234 12/31/09 3:59 PM