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Mandarinka [93]
3 years ago
11

Jen downloads 7 apps for a total of $24. Two of them cost $2.00 each. If the other apps all cost the same amount, how much does

each cost?
Mathematics
2 answers:
wariber [46]3 years ago
7 0

Answer:

4 dollars

Step-by-step explanation:

-4 from the start then 5 times 4 is 20 so you get your answer

Ahat [919]3 years ago
6 0

Answer:

3.42?

Step-by-step explanation:

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Iv) a) 4x 10² solve it in decimal ​
qwelly [4]

40.0*10 is the answer

actually it is 400 but u want in decimal so it is 40.0*10

6 0
3 years ago
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Quadratic equations are never used to solve word problems. True or false?
mel-nik [20]
Quadratic equations CAN be used to solve word problems so the answer to your question is false
7 0
3 years ago
Help me with this pls
Rufina [12.5K]

Answer:

b^-6

Step-by-step explanation:

(b^-2) / (b^4) = b^(-2 - 4)

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3 years ago
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The CDC reported in 2012 that 1 in 88 American children had been diagnosed with an autism spectrum disorder (ASD).
gladu [14]

Answer:

Poisson Distribution , P(x<2) = 0.1446

Step-by-step explanation:

This is a binomial distribution question with

sample space, n = 300

probability of diagnosed with ASD, p = 1/88 = 0.0114

probability of not diagnosed with ASD, q = 1 - p = 0.9886

Mean, m is given as np = 300 * 0.0114 = 3.42

variance, v = npq = 300 * 0.0114 * 0.9886 = 3.38101

standard deviation, s = square root of variance = 3.38101^(0.5) = 1.83875

This binomial distribution can be approximated as Poisson Distribution since

n > 20 and p < 0.05

For a Poisson Distribution

P(X = x) = [e^(-m) * m^(x)]/ x!

b) x = 2

P(X < 2) = P(X = 0) + P(X = 1)

using the z score table and evaluating, we obtain

P(x<2) = 0.1446

4 0
3 years ago
You rent an apartment that costs $1500 per month during the first year, but the rent
belka [17]
<h3>Answer:</h3>

\begin{cases}a_1 = 1500\\a_n = 140+a_{n-1}\end{cases}

==============================

Explanation:

a_1 = 1500 means the first term is 1500, ie this is the first rent value.

To get the next term, we add on $140

So

a_2 = 140+a_1 = 140+1500 = 1640

and

a_3= 140+a_2= 140+1640 = 1780

and so on.

In general, the nth term a_n is found by adding 140 to the term just before it a_{n-1}

So that's where a_n = 140+a_{n-1} comes from.

5 0
2 years ago
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