Module 4 lesson 15.notebook
March 06, 2017
MODULE 4/lesson 15
Read expressions in which letters stand for numbers
Monday, March 6, 2017
QUESTION:
Which two expressions are equivalent to each other? Show your answer is correct by substituting a value for x.
9 + 5x ­ 5 + 3x
10x + 3
x + 12
4(1 + 2x)
2) Which expression is equivalent to 2x + 9 ­ x + 3. Show your answer is correct by substituting a value for x.
QUESTION:
Consider the inequality: x + 8 > 13
Which numbers in the set make the inequality true: (4, 4.5 5 5.5 6 6.6)
Explain why x = 5 is not a solution to the inequality.
LESSON 15
OPENING EXERCISE
x
÷
Exponents
EXAMPLE 1 (a ­ f) (there should be more than 1 answer for each)
The difference of a and b
a decreased by b
b subtracted from a
b) The product of x and y
x multiplied by y
x times y
c) p added to the product of 4 and f
4 times f plus p
d) d minus b cubed
The difference of d and the quantity b cubed
e) add h to the product of 5
and the difference of u and 10
f) The quotient of 3 and the sum of d and f
EXERCISES (1 ­ 10)
Subtraction multiplication
Product quotient
Subtract multiply
Times
8 minus the product of 2 and g
15 times the quantity of a increased by c
The sum of m and n divided by 5
b cubed minus 18
f minus the quotient of d and 2
u divided by x
PROBLEM SET 1