Please help for brainliest :))) Scatter Plot and Equation of the Line of Best Fit

Given fx)= 10-2x, find f(7) -4 3 7 56

Ipatiy [6.2K]

Answer:

A) -4

Step-by-step explanation:

f(x)=10-2x

f(7)=10-2(7)

f(7)=10-14

f(7)=-4

6 0

3 years ago

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An electronics store is selling a pair of headphones for $82.00. If there is a 7% sales tax, what is the actual cost of the head

stepladder [879]

82 x .07 = 5.74
82.00 - 5.74 = 76.26
$76.26

5 0

3 years ago

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A European high-speed passenger train is made up of two first-class passenger cars, five second-class cars, and a restaurant car

Sliva [168]

Answer:

The train can be made up in a total of $\frac{8!}{5!2!}$ ways

Step-by-step explanation:

FIrst, lets assume that all cars are distinct. If that is the case, then, since we have a total of 8 cars, we have

- 8 possibilities for the first car

- 7 possibilities for the second car

- 6 possibilities for the third car

and so on.

So we have a total of 8! = 8*7*6*...*3*2*1 possibilities to make a train.

Now lets take into account that 5 of the cars are identical within each other. Then we could make a permutation of those 5 cars and we wouldnt notice. Hence, the order of the 5 cars of second-class doesnt matter and as a result, we should divide 8! by the total of possible permutations of the 5 second class cars, that it, 5!

We also need to divide the result by 2! = 2, because which first class car came first doesnt matter either. Therefore, the train can be made up in a total of $\frac{8!}{5!2!}$ ways.

8 0

4 years ago

HELP I only need these two problems answered

fomenos

Formula d = vt

1 3/4= 1.75

1/4=0.25

So now plug into equation

To find v first to find per hr.

v = (1.75 miles) / (0.25 hrs) =

7 miles per hr

Distance per hr

d = (7 miles/hr)(1 hr) = 7 miles

In 3 hrs ?

d = (7 miles/hr)(3hr) = 21 miles

6 0

4 years ago

Bob has a concession at Yankee Stadium. He can sell 500 umbrellas at $10 each if it rains. (The umbrellas cost him $5 each.) If

Scilla [17]

Answer:

The optimal strategy for Bob is buying for shine (unless he can watch a forecast to know the next day weather).

Step-by-step explanation:

This is a typical problem of hopes to win vs hopes to lose. Let's analyze each of the strategies Bob can adopt in both kinds of weather.

Bob buy for rain:

Bob will buy 500 umbrellas for a cost of $5 each. This is a total cost of $2500.

If it rain, Bob can sell all umbrellas for $10 each. This gives a maximum revenue of $5000. Therefore the maximum profit is $2500. Remember that:

Profit= Revenue - Cost

If it's a sunny day, Bob can only sell 100 umbrellas for $10 each. This gives a maximum revenue of $1000. Therefore the maximum profit is -$1500. That means that in this case, the minimum loss is $1500.

Bob buy for Shine:

Bob will buy 100 umbrellas for a cost of $5 each and 1000 sunglasses for a cost of $2 each. This is a total cost of $2500.

If it's a sunny day, Bob can only sell all umbrellas for $10 each and all sunglasses for $5. This gives a maximum revenue of $6000. Therefore the maximum profit is $3500.

If it rains, Bob can sell only sell all the 100 umbrellas for $10 each but none of the sunglasses. Therefore the maximum profit is $1000. Therefore the maximum profit is -$1500. That means that in this case, the minimum loss is $1500.

In both cases, the worst-case scenario is the same: a loss of $1500.

Nevertheless in the best case scenario buying to shine gives a bigger profit. Therefore if the risk is the same, is better to go for the strategy with better profits.

3 0

3 years ago