All categories

4 years ago

9millimeters+3.3centimeters

Mathematics

1 answer:

madreJ [45]4 years ago

3 0

4.2 because millimeters are in the decimals section you just add 9 to 3
9+3=12
=4.2

You might be interested in

A train travels 2 1/2 miles in 1/3 of an hour. How many miles per hour does the train go?

Hoochie [10]

Answer: 7.5 mph

Step-by-step explanation:

2.5 * 3 = 7.5

7 0

3 years ago

A cellphone store has 120 cell phones in stock. Of these, 45 have keyboards. The manager of the store wants to add more cell pho

lubasha [3.4K]

Answer:

Step-by-step explanation:

Let x be the number of cell phones with keyboards needed.

40% = $\frac{40}{100}$

$\frac{x+45}{x+120}$ = $\frac{40}{100}$

x+45 = 40 -----1

x+120 = 100 -----2

You would want to make the total of 1 the same as 2.

1× $\frac{100}{40}$ : 2.5+112.5 = 100 -----3

Now 2 and 3 are equal.

x+120 = 2.5x+112.5

Isolate the x and numbers.

120-112.5 = 2.5x-x

Simplify.

1.5x = 7.5

x = $\frac{1}{1.5}$ × 7.5

x = 5

The manager of the store needs to add 5 more cell phones with keyboards.

6 0

3 years ago

The area of a rectangle is 27 square feet. The length is 6 feet longer than the width.

Aleks04 [339]

The answer is 9 ft because if you subtract 6 from 9 you get 3 then when you multiply 9*3 you get 27 ft. I hoped this helped you!!

3 0

4 years ago

Read 2 more answers

I’m another normally distributed test score is 80 and the standard deviations is 10. How common are values in the less than 60?

lord [1]

Answer:

The probability of obtaining a score less than 60 is 2.28%

It happens 2 out of 100 times.

Step-by-step explanation:

If the mean μ = 80 and the standard deviation σ = 10, then we need to find the probability that an X value is less than 60.

Then we find

$P(X$

To find this probability we use the Z statistic.

$Z = \frac{X- \mu}{\sigma}$

$P(\frac{X- \mu}{\sigma}$

$P(Z$

This is the same as

$P(Z> 2)$

We look for this value in the table for the normal distribution of right queue and we have:

$P(X 2) = 0.02275$

The probability of obtaining a score less than 60 is 2.28%

It happens 2 out of 100 times.

6 0

3 years ago

There are 5 blue and 20 white marbles in a box of 50 marbles. Select all the combination of marbles that add up to exactly 50% o

azamat

If you add the white and blue together then you have 25 and 25 is 50% of 50

8 0

3 years ago