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Eva8 [605]
3 years ago
7

What do you divide -81 to get +81?

Mathematics
1 answer:
Sliva [168]3 years ago
6 0
Divide it by -1 to get positive 81
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Mark is taking pledges for bike-a-thon fundraiser. John pledged $2.00, plus $1.75 for each mile Mark bikes. Kiara pledged $5.25,
Shkiper50 [21]

Answer:

The equation for the amount of dollars pledged in total is f(M) = 2.00M + 7.25, and the amount for just Kiara is f(M) = 0.25M + 5.25

Step-by-step explanation:

The amount they pledge up front is a constant and therefore need to be added to the end of the equation. The amount per mile should be a variable amount. This gets multiplied by the M variable. So we start with the Kiara amount.

0.25 per mile = 0.25M

5.25 pledged = 5.25

Now put them together to get f(M) = 0.25M + 5.25

Do the same with Mark.

1.75 per mile = 1.75M

2.00 pledged = 2.00

Now put them together to get f(M) = 1.75M + 2.00

To get the final total, we add both equations together.

f(M) =  0.25M + 5.25 + 1.75M + 2.00

f(M) = 2.00M + 7.25

4 0
3 years ago
You take a quiz with 6 multiple choice questions. After you studied your estimated that you would have about an 80 % chance of g
Arada [10]

Answer:

1.15%

Step-by-step explanation:

To get the probability of m  independent events you multiply the individual probability of each event. In this case we have m independent events, each one with the same probability, therefore:

p^{m}

0.8^{20} = 1.15\%

This is a particlar scenario of binomial distribution problem. So the binomial distribution questions are about the number of success of m independent events, where every individual event has the same p probability. In the question we have 20 events and each event has a probability of 80%. The binomial distribution formula is:

\binom{n}{k} * p^{k} * (1-p)^{n-k}

n is the number of events

k is the number of success

p is the probability of each individual event

\binom{n}{k} is the binomial coefficient

the binomial coefficient allows to find the subsets of k elements in a set of n elements.  In this case there is only one subset possible since the only way to get 20 of 20 correct questions is to getting right all questions (for getting 19 of 20 questions there are many ways, for example getting the first question wrong and all the other questions right, or getting second questions wrong and all the other questions right, etc).

\binom{n}{k} = \frac{n!}{k!(n-k)!}

therefore, for this questions we have:

\frac{20!}{20!(20-20)!} * 0.8^{20} * (1-0.8)^{0} = 1.15\%

4 0
3 years ago
Algebra 1 <br> 2(d - 5) = 8<br> EXPLAIN
Nezavi [6.7K]

Answer:

Step-by-step explanation:

I got you kiddo

You do 2*d - 2*5 = 8 which is 2d-10=8 ------> 2d=8+10 and you do d=18/2 which d = 9

4 0
3 years ago
Read 2 more answers
BC=10, AC=x, and AB=2x-21. Solve for x ,and find the length of AB.
KonstantinChe [14]

Answer:

Briggs is planning to make abatch of home made play dough for an art projections

4 0
2 years ago
A man sold his car for 5,000 which was 60% less than it cost him, how much did the car cost him?
marissa [1.9K]

To find the original cost, divide the price he sold it for by the percentage:

5000 / 0.60 = 8,333.33

He bought the car for $8,333.33



8 0
2 years ago
Read 2 more answers
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