Evaluating expressions

Evaluating expressions

When you evaluate expressions, you simply replace the variables(letters) with its given value(number). You can use desmos to help you get your final answer!

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Evaluate: 4(x+y)-2 when x = 4 and y = 5

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Evaluate

 $3x^2+2y$  when x =3 and y = -3

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Evaluate

 $-5a+2b-6c$  when a = -6, b = 1/2, c = -2.5

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Evaluate

 $\sqrt{5x}+2y$  when x = 5 and y = -2

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Evaluate

 $\left|2x-y\right|$  when x = 3 and y = 10

Multiple Choice

The price of a visit to the dentist is calculated according to the formula 50+100n, where n is the number of cavities the dentist finds. On your last visit to the dentist, two cavities were found. What was the cost of your visit?

• $150

• $200

• $250

• $300

Multiple Choice

An ice cream stand uses the expression 2 + 0.5x to determine the cost (in dollars) of an ice cream cone that has x scoops of ice cream. How much does an ice cream cone with five scoops cost?

• $2.50

• $3.50

• $4.50

• $5.50

Multiple Choice

The speed of a car is 60 miles per hour, so the distance it runs is 60 t miles, where t represents the hours the car runs. What is the distance the car travels if t = 5 hours?

• 65 miles

• 130 miles

• 260 miles

• 300 miles

Multiple Choice

You are saving for a skateboard. Your aunt gives you $45 to start, and you save $3 each week. The expression 45 + 3w gives the amount of money you save after w weeks. How much will you have after six weeks?

• $48

• $63

• $81

• $135

Multiple Choice

The expression 20a + 13c is the cost for a adults and c students to enter the Miami Science Museum. Find the total cost for 4 adults and 24 students.

• $392

• $93

• $532

• $1348