Writing expressions

Imagine you have a lemonade stand. Each cup of lemonade costs $2. If you sell x cups, how much money will you make?
How can we represent the total money made using a variable?

We can represent the total money made using the expression 2x.

Match

If x is 6 what is...

• x + 4

• 7 - x

• $$\frac{1}{3}x$$

• x² $$\div$$ 6

10

1

2

6

• 10

• 1

• 2

• 6

Match

Match the translation of the following mathematical symbol.

• +

• -

• $$\cdot\ or\ \left(\ \ \ \right)$$

• $$\div$$

plus, increased by, more than, sum

minus, decreased by, difference

multiplied by, the product of, and times

the ratio of, divided by, and quotient

• plus, increased by, more than, sum

• minus, decreased by, difference

• multiplied by, the product of, and times

• the ratio of, divided by, and quotient

Match

Translate the following verbal phrase to mathematical symbols.

• the same as, is, is equal to, equals, yields

• is greater than

• is less than

• is greater than or equal to; is at least

• is less than or equal to; is at most

=

• =

• $$>$$

• $$<$$

• $$\ge$$

• $$\le$$

Match

Identify the parts of the algebraic expression: 4a + 3.

• a

• 3

• 1

• 2

• 4

variable

constant

exponent

number of terms

coefficient

• variable

• constant

• exponent

• number of terms

• coefficient

Multiple Choice

Translate: The temperature in Celsius (C) is five-ninths of the difference of the temperature in Fahrenheit (F) and 32.

• $$C\ =\ \frac{5}{9}\left(F\ -\ 32\right)$$

• $$F=\frac{5}{9}\left(C-32\right)$$

• $$C=\frac{5}{9}F-32$$

• $$F=\frac{5}{9}C-32$$

Convert 50⁰ Fahrenheit to Celsius.

Multiple Choice

Translate: The area (A) of a triangle is half the product of the base (b) and height (h).

• $$A=\frac{1}{2}bh$$

• $$A=2bh$$

• $$A=\frac{b}{2h}$$

• $$A=\frac{1}{2bh}$$

Find the area of the triangle if the base is 8 cm and height is 6 cm.

​A = 24 cm²

Multiple Choice

Translate: The temperature in Fahrenheit (F) is nine-fifths of the temperature in Celsius (C) increased by 32.

• 
  $$F=\frac{9}{5}C\ +\ 32$$

• $$C\ =\ \frac{9}{5}F\ +32$$

• $$F\ =\frac{9}{5}\left(C+32\right)$$

• $$F\ =\ \frac{9}{5}+32$$

Poll

You and a friend are traveling to Canada. Watching the weather forecast, you see the projected high temperature for the day is 25℃. You look up the formula to convert Celsius to Fahrenheit and see that it is $$F=\frac{9}{5}C\ +32$$ . What is the temperature in Fahrenheit?

• 77⁰ F

• 57⁰ F

• 51⁰ F

• 82⁰ F