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spayn [35]
2 years ago
14

For a school fundraiser, Mai will make school spirit bracelets. She will order bead wiring and alphabet beads to create the brac

elets. Mai must spend $250 on wire and $5.30 per bracelet for beads. Write an expression for this situation.
Mathematics
1 answer:
sergejj [24]2 years ago
6 0
250+5.30x= y ( x is the number or bracelets she sells and y is the total cost)
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4 Riley finds a recipe for bubble solution that uses 1 cup water, 2 cup dish soap,
Arada [10]

Answer:

1 cup

Step-by-step explanation:

the recipe calls for one cup of water per two cups of dish soap, so if she uses two cups of dish soap she should use one cup of water and one tablespoon of corn syrup.

4 0
3 years ago
Suppose a basketball player has made 231 out of 361 free throws. If the player makes the next 2 free throws, I will pay you $31.
statuscvo [17]

Answer:

The expected value of the proposition is of -0.29.

Step-by-step explanation:

For each free throw, there are only two possible outcomes. Either the player will make it, or he will miss it. The probability of a player making a free throw is independent of any other free throw, which 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.

Suppose a basketball player has made 231 out of 361 free throws.

This means that p = \frac{231}{361} = 0.6399

Probability of the player making the next 2 free throws:

This is P(X = 2) when n = 2. So

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

P(X = 2) = C_{2,2}.(0.6399)^{2}.(0.3601)^{0} = 0.4095

Find the expected value of the proposition:

0.4095 probability of you paying $31(losing $31), which is when the player makes the next 2 free throws.

1 - 0.4059 = 0.5905 probability of you being paid $21(earning $21), which is when the player does not make the next 2 free throws. So

E = -31*0.4095 + 21*0.5905 = -0.29

The expected value of the proposition is of -0.29.

3 0
2 years ago
Read below i need some help please
Anton [14]

Answer:

<u><em>8/20</em></u>

Step-by-step explanation

<em>boys left handed=3 </em>

<em>boys right handed=9 </em>

<em>girls left handed=2 </em>

<em>girls right handed=6 </em>

<em>what is the probability that a student chosen from random is a girl? give answer as a fraction please and include step by step process</em>

<em>girls left handed: 2</em>

girls right handed: 6

6+2=8

total all students 20

<em>8/20</em>

4 0
3 years ago
A magazine costs 4.95 per month. If you buy a one year subscription, it's 30% cheaper. How much will you pay in one year with th
astraxan [27]

Answer:

41.48/year

Step-by-step explanation:

4.95 x 12 = 59.40

59.40 × .30 = 17.82

59.40 - 17.82 = 41.48

6 0
2 years ago
7.9x – 2 – 3.2x – 10 = 2.8 + x
ryzh [129]

Answer:

x=4

Step-by-step explanation:

combine like terms

divide to get the x by itself

5 0
2 years ago
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