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marta [7]
3 years ago
7

87 - 4x= 43 I need to solve for x

Mathematics
2 answers:
wolverine [178]3 years ago
8 0

Answer:

x = 11

PLZ MARK AS BRAINLIEST

egoroff_w [7]3 years ago
7 0

Answer:

x = 11

Step-by-step explanation:

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In Happyville, the ideal family has four children, at least two of which are girls. If you randomly select a Happyville family t
sleet_krkn [62]

Answer:

0.3125 = 31.25% probability that it is not ideal.

Step-by-step explanation:

For each children, there are only two possible outcomes. Either it is a girl, or they are not. The probability of a child being a girl is independent of any other child. This means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

0.5 probability of a children being a girl:

This means that p = 0.5

If you randomly select a Happyville family that has four children, what is the probability that it is not ideal?

Not ideal is less than two girls, so this is P(X < 2).

Four children means that n = 4. So

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

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 0) = C_{4,0}.(0.5)^{0}.(0.5)^{4} = 0.0625

P(X = 1) = C_{4,1}.(0.5)^{1}.(0.5)^{3} = 0.25

P(X < 2) = P(X = 0) + P(X = 1) = 0.0625 + 0.25 = 0.3125

0.3125 = 31.25% probability that it is not ideal.

7 0
2 years ago
I need to know the answer
Mamont248 [21]

she sold a total of 97 shirts, so mulitiply 97 by the profit, which is 27. that gives you the answer of $1649.
8 0
3 years ago
Please please help. Thank you
Diano4ka-milaya [45]
Answer is x^3(x+3)(x+1)
5 0
3 years ago
20 POINTS HURRY PLEASE
irina1246 [14]

Answer:

Not a right-angle triangle

Step-by-step explanation:

15² = 12² + 8²

225 = 144 + 64

225 = 208 is a false statement

So not a right angle triangle

4 0
4 years ago
Read 2 more answers
At a local park, Jared can choose between two circular paths to ride his bicycle. One path has a diameter of 240 yards, and the
amid [387]

Answer:

94.2 yards

Step-by-step explanation:

1st path = d = 120 yards

c= pie d

c= 376.8 yards

2nd yard = r = 45 yards

c = 2 pie r

c = 2(3,14)(45)

c = 282.6 yards

then subtract yard 1 and yard 2 to get 94.2 yard

ANSWER :94.2 yards

4 0
3 years ago
Read 2 more answers
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