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3 years ago

A person has 17 coins, all nickels and dimes, worth $1.25. How many nickels are there?

1 answer:

3 0

This is a problem of guess and check; there's no easier way to do it.But in this case you must have an odd number of nickels to make the 5 cents, so your answer is 9 nickels.you can check this by multiplying each one by .05: 9*.05=.45 the rest of the coins left, are 8 of them, and their dimes. .10*8=.80 .80+.45= 1.25

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3 years ago

Since 2010, when 102390 Cases were reported, each year the number of new flu cases decrease to 85% of the prior year. Predict th

BaLLatris [955]

Answer:

20,158 cases

Step-by-step explanation:

Let $t=0$ represent year 2010.

We have been given that since 2010, when 102390 Cases were reported, each year the number of new flu cases decrease to 85% of the prior year.

Since the flu cases decrease to 85% of the prior year, so the flu cases for every next year will be 85% of last year and decay rate is 15%.

We can represent this information in an exponential decay function as:

$F(t)=102,390(1-0.15)^t$

$F(t)=102,390(0.85)^t$

To find number of cases in 2020, we will substitute $t=10$ in our decay function as:

$F(10)=102,390(0.85)^{10}$

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$F(10)=20,157.970260446597\approx 20,158$

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2 years ago

What does the line 4x y = 17 look like?

olganol [36]

The equation must be 4x + y = 17

I will use the y-intercept slope version

y = - 4x + 17

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Answer:

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Hope this helps :)!!!!!!!!!!!!!!!!!!!!!

Step-by-step explanation:

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