All categories

3 years ago

A dozen plain hats cost $3.60.What is the unit rate of a hat?

Mathematics

1 answer:

antoniya [11.8K]3 years ago

4 0

$0.30

Here's why:
3.60 30
--------- = -----
12 1

3.60 / 12 = .3
12 / 12 = 1

You might be interested in

At a local University, it is reported that 81% of students own a wireless device. If 5 students are selected at random, what is

Sphinxa [80]

Answer:

34.87% probability that all 5 have a wireless device

Step-by-step explanation:

For each student, there are only two possible outcomes. Either they own a wireless device, or they do not. The probability of a student owning a wireless device is independent from other students. So we use the binomial probability distribution 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.

81% of students own a wireless device.

This means that $p = 0.81$

If 5 students are selected at random, what is the probability that all 5 have a wireless device?

This is P(X = 5) when n = 5. So

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

$P(X = 5) = C_{5,5}.(0.81)^{5}.(0.19)^{0} = 0.3487$

34.87% probability that all 5 have a wireless device

5 0

3 years ago

Solve ax-5=b for a. So which one is right A,B,C or D

Darya [45]

It would be c

ax-5=b What you have to do is get a to be by itself

So you would add 5 to both sides:
ax-5(+5)=b(+5) = ax=b+5

And then divide x by both sides. You divide because a is multiplied by x on the left side, so to move it to the other side you’d have to do the opposite and divide:
ax /x=b+5 /x

Answer is C ... a=(b+5) /x

7 0

3 years ago

Read 2 more answers

Which function can be used to represent the graphed geometric sequence

Evgesh-ka [11]

It could probably be c

4 0

3 years ago

Rewrite y + 3 = 0 using function notation.

liubo4ka [24]

First rewrite as y = ..., just move the +3 to the other side (sign flips):

y = -3.

Then replace y by f(x):

f(x) = -3.

This is a straight line at y=-3.

Answer B.

4 0

3 years ago

A rope is 544 feet long. If it is cut into pieces 2 feet long, how many pieces will there be

Minchanka [31]

There will be 272 pieces.

4 0

3 years ago