1. a used-car lot has 120 vehicles for sale. a sample of 15 of these vehicles finds that 6 of them have previously been in an accident. what is the best estimate of the percent of the used-car lot's vehicles that have previously been in an accident? enter your answer in the box. _% 2. two number cubes are rolled. each number cube has sides numbered 1 through 6. what is the probability that the outcome of the roll is an even sum or a sum that is a multiple of 3? enter your answer, in simplest fraction form, in the box. _

Part 1

A used-car lot has 120 vehicles for sale. Since a sample of 15 of these vehicles finds that 6 of them have previously been in an accident. That means that the probability of finding a an accident car is

when the number of cars is 120, the number of accident cars will be:

Thus the best estimate of the percent of the used-car lot's vehicles that have previously been in an accident is 48.

Part 2

The total sample space of the sums has outcomes.

Out of this, the required events are:

Which is 24 in number.

Thus the probability required is

d

step-by-step explanation:

given

y + 3 = - 4(x - 2) ← distribute the parenthesis

y + 3 = - 4x + 8 ( subtract 3 from both sides )

y = - 4x + 5 → d

2 & 7

step-by-step explanation:

he climbs 300 ft/hr at a constant rate. the peak is at 1,500 ft.

when going up, he reaches 600 ft in 2 hours. remember, that he is going in a constant rate. divide 600 with 300:

600/300 = 2

assuming that he takes the same route back (meaning that it's a 1500 ft route back, you can solve.

note also that you are solving when he gets back to 600 ft after he reaches the peak.

first, find the amount of hours it takes to get up the peak. divide the total amount (1500), with the ft/her (300) to get the amount of hours (x):

1500/300 = x

x = 5

it takes jamie 5 hours to get up. now, he is returning down, and reaches 600 (his current destination). remember that he climbs at a constant 300 ft/hr. divide 600 with 300:

600/300 = x

x = 2

now add the two numbers together.

x = 5 + 2 = 7

jamie takes 7 hours to go up the mountain and reach his current position when descending.

(total amount/constant rate) = (time).

remember that it is a constant rate, so in total, when he gets back down the mountain, it will take the same amount of time as when he goes up. the total amount for the round trip is: 5 + 5 = 10.

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