In Portland, ME, the current temperature is 38 degrees Fahrenheit. In Boston, MA, the current temperature is 2 degrees Celsius. Which city is colder
(hint: conversion of Celsius C to Fahrenheit F is
F = 9/5 C + 32)
Boston
100
refer to page 14, question 3
k=45
200
refer to page 25, question 37
7.5
200
1/3 x + 3= 13
30
200
3 x + 1/5 y = 7
y = 35 - 15x
200
You begin with $25 in
a savings account and $50 in a checking
account. Each week you deposit $5 into
savings and $10 into checking. After how
many weeks is the amount in checking twice
the amount in savings?
The amount in checking is
always twice the amount
in savings.
200
refer to page 14, question 4
a = 60
300
refer to page 25, question 38
232
300
3x + 20 = 5x + 6
7
300
6 = 4x + 9y
y = 2/3 - 4/9 x
300
The formula for simple interest I
is I = Prt. Solve the formula for the interest
rate r. What is the interest rate r if the principal
P is $1500, the time t is 2 years, and the interest
earned I is $90?
3%
300
refer to page 14, question 5
b = 90
400
refer to page 25, question 41
10 ML
400
2/4 x + 5 = 3x + 15
4
400
π = 7x - 2y
y = 7/2 x - 1/2 π
400
Lightning has a temperature of 30,000 degrees Celsius While the heat of the surface of the sun is 11000 degrees Fahrenheit. Which has the greater heat?
(hint: conversion of Celsius C to Fahrenheit F is
F = 9/5 C + 32)
Lightning
400
refer to page 10, question b
x = 55
500
refer to page 25, question 43a
40 ft
500
2/3 y+4=2 2/3(y+3)
2
500
the formula K= C + 273.15 converts temperature Celsius C to Kelvin K
a. solve the formula for C
b. convert 300 Kelvin to Celsius
a. C = K -273.15
b. 26.85 degrees
500
A boat travels x miles per hour from one island to another
island in 2.5 hours. The boat travels 5 miles per hour faster
on the return trip of 2 hours. What is the distance between
the islands?