Project 800

When calculating the percentage of an amount, multiply that amount by the decimal equivalent of the percentage.

Ex: 10% of 200:

$$.10\cdot200=20$$

When calculating the percentage of an amount, multiply that amount by the decimal equivalent of the percentage.

Ex: 10% of 200:

$$.10\cdot200=20$$

When calculating the percentage of an amount, multiply that amount by the decimal equivalent of the percentage.

Ex: 10% of 200:

$$.10\cdot200=20$$

1) Solve for x by subtracting 6 from both sides because it's the inverse of addition

2) Divide both sides by 4 because it's the inverse of multiplication (4x means 4 is being multiplied by x)

3) Evaluate the answer choices to see which equations are true when x=3

$$4x+6=18$$

Not pictured as an answer choice. Keep going.

$$4x=12$$

Secured after subtracting 6 from both sides. (Subtracting 6 is the inverse operation to adding 6)

$$4x-6=18$$

Represent the unknown amount of apples with "x", the discount with "-6", and the total amount of the purchase as "18".

If "push came to shove" and you forgot your inverse operation rules, plug each answer in for "x" and evaluate which one ended with:

$$18=18$$

"Spend a maximum of $75" means that the amount spent cannot exceed $75. However, it can be equal to 75.

As an inequality:

$$Amount\ spent\le\text{75}$$

"Spend a maximum" means $$Amount\ spent\le Maximum\ amount\ of\ money\ alotted$$ Reads: "Amount spent has to be less than or equal to the maximum amount of money allotted."

Functions are based on inputs and outputs.

"g(x)" for example, represents the output.

Two options:

1) Plug each answer choice into the right side of the equation and see if you get 25

Ex:

$$25=x^2+9$$

$$25=4^2+9$$

$$25=16+9$$

$$25=25$$

2) Solve using inverse operations