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den301095 [7]
3 years ago
10

Greg has decreased his running time by minute each of the last six weeks. Write an expression to represent the total change in h

is time over the last six weeks. Then, find the total change.
Mathematics
1 answer:
Anettt [7]3 years ago
6 0
Total change in relation to when Greg first started decreasing his run time : -6 minutes (at the end of 6 weeks)

Expression : -x (x is the number of weeks)
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2 years ago
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Which expression is equivalent to the following complex fraction?
I am Lyosha [343]

what a mess?!

please write your question better...

if you don't want the wrong answer

Step-by-step explanation:

what should we do?

4 0
3 years ago
If g(x)=25 and h(x) = 4 – X, what is the value of (g•h)(-3)?
madam [21]

Answer:

175

Step-by-step explanation:

(g*h)(x) is the product of two functions:  g(x) = 25 and h(x) = 4 - x.

This product is equal to 100 - 25x.

Substituting -3 for x, we get

(g•h)(-3) = 100 - 25(-3) = 175

5 0
3 years ago
Alice has two bags of marbles: Bag A contains 8 red and 3 blue marbles, and Bag B contains 5 red and 7 blue marbles. She randoml
Thepotemich [5.8K]

It might help to draw out a probability tree. Check out the diagram below. The first two branches at the top represent bags A and B. The probability of picking either bag is 1/2 assuming each bag is equally likely to be picked.

If we go with bag A, then the probability of getting blue is 3/11 since there are 3 blue out of 8+3 = 11 total. The probability of getting bag A and a blue marble is (1/2)*(3/11) = 3/22 which I've marked in the diagram as well.

If we go with bag B, then the probability of getting blue is 7/12 since there are 7 blue out of 5+7 = 12 total. The probability of getting bag B and blue is (1/2)*(7/12) = 7/24

Add up the results found getting

P(blue) = P(blue & bag A) + P(blue & bag B)

P(blue) = 3/22 + 7/24

P(blue) = 36/264 + 77/264

P(blue) = 113/264

This is shown in the diagram as well.

--------------------------------------------------

Recall that conditional probability in general is defined as follows

P(A given B) = P(A and B)/P(B)

In this problem, we'll have

P(bag B given blue) = P(bag B and blue)/P(blue)

Therefore, we can say...

P(bag B given blue) = P(bag B and blue)/P(blue)

P(bag B given blue) = (7/24)/(113/264)

P(bag B given blue) = (7/24)*(264/113)

P(bag B given blue) = (7*264)/(24*113)

P(bag B given blue) = (7*24*11)/(24*113)

P(bag B given blue) = (7*11)/(113)

P(bag B given blue) = 77/113

In short, the probability of getting bag B, given the marble is blue, is 77/113.

8 0
2 years ago
Carolyn paid a mechanic x dollars per hour for a 5-hour job plus $70 for parts. The total charge was less than $320. Which equat
snow_lady [41]

Answer: should be 70+50x is less than 320

Step-by-step explanation:$70 is only added once, and for 5 hours, she pays him a certain amount of $(x). I don't know if the multiple choices are valid

3 0
2 years ago
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