# Hotmath

Title:
Hotmath
Author:
Hotmath
Chapter: Operations, Expressions and Variables Section: Variables and Expressions

Problem: 1

Classify the given expression as a numerical expression or a variable expression . Name the variable, if it is a variable expression.

b + 7

Problem: 3

Classify the given expression as a numerical expression or a variable expression. Name the variable, if it is a variable expression.

10 – n

Problem: 5

Write the simplest form of the given expression.

1.53 + 11.3

Problem: 7

Write the simplest form of the given expression.

0.4 8

Problem: 9

Find the value of the given expression when y = 3.

y + 21

Problem: 11

Find the value of the given expression when y = 3.

9 y

Problem: 13

Find the value of the given expression when m = 6.

4 + 7 + 5 + m

Problem: 15

Find the value of the given expression when n = 5.

10( n – 2)

Problem: 17

Find the value of the given expression when m = 6.

m m m m

Problem: 19

Evaluate the expression when x = 4.

(8 – x + 8) x

Problem: 21

Find the value of the expression when x = 6 and y = 2.

x y

Problem: 23

Find the value of the given expression when c = 5.3 and d = 2.

c d

Problem: 25

Evaluate the expression when a = 2 and b = 7.

( a + b ) ( b – 2 a )

Problem: 27

Find the value of the expression when b = 5 and c = 8.

3 bc ( c b )

Problem: 29

Find the value of the expression when a = 2.4 and b = 8.4.

6 ab (2 b + a )

Problem: 31

Find the value of the given expression if a = 7, and c = 8.

Problem: 33

Find the value of the given expression if a = 7, b = 2 and c = 8.

Problem: 35

Transform the given phrase into an algebraic expression.

the quotient of seventy–five and c

Problem: 37

Convert the word phrase "7 times a number" to a variable expression.

Problem: 39

Convert the sentence " x less than 5 is equal to 10" to a mathematical equation.

Problem: 41

Convert the word phrase "a number m increased by 200" to a variable expression.

Problem: 43

For the given quantity, write an expression.

the number of months in x years

Problem: 45

A helicopter is flying at an altitude of m meters.

For the expression m + 25, write a word phrase.

Problem: 47

A helicopter is flying at an altitude of m meters.

For the expression 2 m , write a word phrase.

Problem: 49

For the given algebraic expression form a verbal phrase.

28 – c

Problem: 51

For the given algebraic expression form a verbal phrase.

s 8

Problem: 53

For the given algebraic expression form a verbal phrase.

3 b + 2

Problem: 55

Tom has x mangoes. If Sam has 35 fewer mangoes than Tom, write a variable expression for the number of mangoes Sam has.

Problem: 57

In a zoo, there are three times as many tigers as lions.

a) Find the number of tigers if there are x lions.

b) Find the number of lions if there are y tigers.

Problem: 59

Ruth and her family went out for a movie. She bought eight adult tickets at \$5.75 each and three children's tickets at \$3.25 each. Calculate the money she paid at the counter.

Problem: 61

If n is an even number, what can you say about ?

What must be true about n for to also be an even number?