Practice TSIA2

Evaluate the expression when 𝑥=2, 𝑦=−3, and 𝑧=−1

2𝑥 +3𝑦 − 𝑧

• 4

• 14

• 5

• -4

A bag contains 9 red marbles, 2 blue marbles, and 5 green marbles. What is the probability of choosing a blue marble?

Find the equation of a line passing through (6,9) and (0,0).

There are 3𝑥−2 trees planted in each row of a rectangular parcel of land. If there are a total of 24𝑥−16 trees planted in the parcel, how many rows of trees are there in the parcel?

• 8

If variables 𝑥 and 𝑦 are directly proportional, and 𝑦=2 when 𝑥=3. What is the value of 𝑦 when 𝑥=9?

• 4

• 6

• 8

• 12

A group of 18 people ordered soup and sandwiches for lunch. Each person in the group had either one soup or one sandwich. The sandwiches cost $7.75 each and the soups cost $4.50 each. If the total cost of all 18 lunches was $113.50, how many sandwiches were ordered?

• 7

• 8

• 9

• 10

In the 𝑥𝑦–plane, what is the 𝑦–intercept of the graph of the equation 𝑦=2(𝑥+3)(𝑥−4)?

• -24

• -12

• -2

• 12