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2 years ago

Find the value of x and y

Mathematics

1 answer:

LekaFEV [45]2 years ago

4 0

Answer:

x = 30, y = 15

Step-by-step explanation:

x = 2*15 = 30

(Central angle is twice the inscribed angle standing on the same arc.)

Similarly,

y = 15

(Base angles of isosceles triangle are equal)

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PLEASE HELP!!!!

jasenka [17]

Answer:

they are 2

Step-by-step explanation:

7 0

2 years ago

If a seed is planted, it has a 90% chance of growing into a healthy plant. If 12 seeds are planted, what is the probability that

blondinia [14]

Answer:

0.2301 = 23.01% probability that exactly 2 don't grow.

Step-by-step explanation:

For each seed planted, there are only two possible outcomes. Either it grows into a healthy plant, or it does not. The probability of a seed growing into a healthy plant is independent of any other seed, 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.

90% chance of growing into a healthy plant.

This means that $p = 0.9$

12 seeds are planted

This means that $n = 12$

What is the probability that exactly 2 don't grow?

So 12 - 2 = 10 grow, which is $P(X = 10)$ . Then

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

$P(X = 10) = C_{12,10}.(0.9)^{10}.(0.1)^{2} = 0.2301$

0.2301 = 23.01% probability that exactly 2 don't grow.

5 0

3 years ago

You invested a total of $25000 at 3% and 4.5% simple interest. During one year, the two accounts earned $900. How much did you i

Sedaia [141]

A:amount of money invested in the account with 3% simple interest
B: amount of money invested in the account with 4.5% simple interest
a+b=25000 ——>a=25000-b

0.03a+0.045b=900
30a+45b=900000
2a+3b=60000

2(25000-b)+3b=60000
50000-2b+3b=60000
B=10000
A=25000-10000=15000

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3 years ago

which type of data would be best displayed in a box plot? HELP ME, GOD BLESS. I think it's between 1 and 2

kramer

1 because it represents a range

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3 years ago

Read 2 more answers

Gabriel bought a purse that was on sale at 10% off. If she paid $59.95, including tax, and the sales tax rate was 6%, how much d

pochemuha

Answer:

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