Review of Equations

Equations, Evaluating Expressions & Formulas

This should already be in your notes, but if not, time to get it there now!

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​Translating words

Dropdown

Which algebraic expression translates from 9 more than x​

Select answer

Multiple Choice

Which expression was translated from: 4 decreased by y

• y - 4
• 4 + y
• 4 - y
• 4y

Fill in the Blanks

Write an algebraic expression that represents: 3 times m minus 4

Match

Match the expression and it's given statement​

• w dollars per 4 notebooks

• the quotient of 20 and w

• 3 times w minus 1

• 34% of w

• 2/3 of w

w/4

20/w

3w-1

0.34w

(2/3)w

• w/4

• 20/w

• 3w-1

• 0.34w

• (2/3)w

​Now let's try equations~

Remember, the difference between an expression and an equation is the equals sign!

For example: 2x + 3 is an expression; 2x + 3 = 6 is an equation.

Multiple Choice

Translate this sentence into an equation: 4 increased by 9 is equal to x

• 4 - 9 = x
• 4 + 9 = x
• 4 / 9 = x
• 4 * 9 = x

Multiple Choice

Translate this sentence into an equation: m is the product of 4 and 3

• m = 4 * 3
• m = 4 / 3
• m = 4 - 3
• m = 4 + 3

Fill in the Blanks

Okay, translate this one: 6 times b is 42

(That means we're going to use substitution e.g. plugging in numbers for variables)

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Next we're evaluating expressions & formulas

b(a-4)/c

If a = 6, b = 3, c = 2

Evaluate 3x-7

If x = 4 and y = 2

Let's start with expressions:

Fill in the Blanks

Okay, now you do one. If x = 3 and y = -2

Evaluate 2x + 2y

Fill in the Blanks

One more for good measure: if a = 7 and b = 9

Evaluate a + b/3

Forumlas

Remember the overtime formula?

The overtime formula:

Gross pay = Hourly Wage (40) + 1.5(hourly wage)(overtime hours)
This can be re-written as: G = H(40) + 1.5(H)(O)

G= gross pay; H= hourly wage; O=overtime hours

Fill in the Blanks

Using the overtime formula G = H(40) + 1.5(H)(O),

evaluate for G. H = $6.10 and O = 10.4

Fill in the Blanks

Let's try one more for good measure: G = H(40) + 1.5(H)(O)

H = 15.15 O = 2.37

Round to the nearest cent.

Open Ended

How do you feel about this lesson? Do you understand? What would be more helpful for you to learn?