Ask question

Ask question

All categories

2 years ago

10

Johnny buys broken bicycles from the junkyard, repairs them, and then resells them. He recently sold a bike for $50, which was 2

50% of the price at which he bought it. What was the price he paid for the bicycle from the junkyard?

1 answer:

sesenic [268]2 years ago

8 0

Answer:

the bike was bought for $20

Step-by-step explanation:

this is true because 20*2.50 is 50

2.50 is the same as 250%

You might be interested in

A firecracker shoots up from a hill 160 feet high, with an initial speed of 90 feet per second. Using the formula H(t) = −16t2 +

Masja [62]

When the firecracker hits the ground, H(t) = 0.0 = -16t^2 + 90t + 160 Using the quadratic formula,t = (-90 +- sqrt(90^2 - 4(-16)(160))) / 2(-16)t = -1.42 ort = 7.04

The negative time is extraneous. Therefore,t = 7.04 s.

Seven Seconds is your answer!

3 0

3 years ago

Read 2 more answers

suppose that the current canadian dollar to US dollar exchange rate is 0.80 CAD = $1 US and that the U.S. dollar price of an App

Deffense [45]

Answer: 256 CAD

Step-by-step explanation:

Hi, to answer this question we simply have to multiply the price in US dollars of the iphone (320) and multiply it by 0.80 ( Canadian dollar to US dollar exchange rate)

Mathematically speaking:

Since:

$1 US = 0.80 CAD

$320 x0.80 = 256 CAD

Feel free to ask for more if needed or if you did not understand something.

7 0

3 years ago

Nine dollars each hour

FromTheMoon [43]

I don’t understand your question

5 0

3 years ago

Read 2 more answers

Bruh I need help ion know this stuff

ArbitrLikvidat [17]

I believe the answer is b and e

3 0

3 years ago

Read 2 more answers

A recent survey found that 70% of all adults over 50 wear

lubasha [3.4K]

Answer:

There is an 84.97% probability that at least six wear glasses.

Step-by-step explanation:

For each adult over 50, there are only two possible outcomes. Either they wear glasses, or they do not. This means that we use the binomial probability distribution to solve this problem.

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 combinatios 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.

In this problem we have that:

$n = 10, p = 0.7$

What is the probability that at least six wear glasses?

$P(X \geq 6) = P(X = 6) + `P(X = 7) + P(X = 8) + P(X = 9) + P(X = 10) = 0.8497$

There is an 84.97% probability that at least six wear glasses.

5 0

3 years ago