Erik rode down an escalator, while raj rode up.

a coordinate grid showing escalator ride with seconds on the escalator on the horizontal, t, axis, and elevation in meters on the vertical, h, axis with 2 lines. one line labeled erik, and passes through (0, 12) and (8, 6). the second line labeled raj, passes through (0, 0) and (8, 6).

erik's elevation is represented by the equation h = 12 – 0.75t, and raj's elevation is represented by h = 0.75t. what does the point of intersection on the graph represent?

erik and raj were at the same elevation after both of them had been riding the escalator for 6 seconds.

erik and raj were at the same elevation after both of them had been riding the escalator for 8 seconds.

erik and raj were at the same elevation after erik had been riding the escalator for 6 seconds and raj had been on the escalator for 8 seconds.

erik and raj were at the same elevation after erik had been riding the escalator for 8 seconds and raj had been on the escalator for 6 seconds.

Graph red beads cost $1 an ounce and gold beads cost $3 an ounce. juanita wants to purchase a 12-ounce mixture of red and gold beads that she can sell for $2 an ounce. the solution of the system shows the number of beads needed for juanita to break even. x + y = 12, x + 3y = 24 how many ounces of red beads will juanita buy to break even? how many ounces of gold beads will she buy?

Bonnie and bobby are saving money for a vacation. each friend starts with an amount and also saves a specific amount each week. bonnie created a table to show the total she has saved at the end of each week.. weeks 0 1 2 3 4 5 6 7 8 amount saved 12 16 20 24 28 32 36 40 44 bobby came up with the following equation to show the total, y, he has saved at the end of each week, x. y = 12x + 4 compare the rate at which each friend saves money. select the correct answer from the drop-down menu to complete the statement. the rate at which bobby is adding to his savings each week is $ more than the rate at which bonnie is adding to her savings each week.

Which scenarios are most effectively explored by conducting an experiment? there is more than one correct answer. select all that apply. researchers want to study the effectiveness of a particular drug for treating migraines. they want to know which dosage of the drug yields the best results with the least side effects. to ensure fair results, the researchers want to ensure that participants and dosage administrators do not know which dosage participants receive. a teacher wants to plan a class fieldtrip and quickly determine where students prefer to go for the class fieldtrip. a car mechanic wants to know which of two engine brands makes better-performing engines. he wants to test the engines in identical situations and rate their performance in a way that can be fairly measured. a chemist studies the properties of a metal compound. she wants to know how the sample size of the metal affects its ability to conduct electricity. she wants to conduct the research in a controlled environment to minimize bias. a realty company wants to know the average income of its clients. the company wants to gather data income from current clients.