All categories

3 years ago

A 7/16- inch- long bolt is used in a machine.what is the length of the bolt written as a decimal?

Mathematics

1 answer:

mezya [45]3 years ago

7 0

0.4375 inch is the answer

You might be interested in

Your math teacher tells you that the next test is worth 100 points and contains 38 problems. Multiple-choice questions are worth

rusak2 [61]

If we assume that
x isthe number of multiple choice questions, and y is the number of word problems, we can write a system of equations like:
{ x + y = 38
{ 2x + 5y = 100

If we multiply the first equation by -2 we get:
{ -2x-2y = -76
{ 2x + 5y = 100

Now if we add both equations we get only equation with 1 unknown (y) :

3y = 24 ⇒ y = 8

Substituting the calculated value to the first equation we get:

x + 8 = 38 ⇒ x = 30

The solution:
{ x = 30
{ y = 8

means that:
The test had 30 multiple choice questions, and 8 word problems.

4 0

3 years ago

The amount of time workers spend commuting to their jobs each day in a large metropolitan city has a mean of 70 minutes and a st

Zepler [3.9K]

Answer:

At least 75% of these commuting times are between 30 and 110 minutes

Step-by-step explanation:

Chebyshev Theorem

The Chebyshev Theorem can also be applied to non-normal distribution. It states that:

At least 75% of the measures are within 2 standard deviations of the mean.

At least 89% of the measures are within 3 standard deviations of the mean.

An in general terms, the percentage of measures within k standard deviations of the mean is given by $100(1 - \frac{1}{k^{2}})$ .

In this question:

Mean of 70 minutes, standard deviation of 20 minutes.

Since nothing is known about the distribution, we use Chebyshev's Theorem.

What percentage of these commuting times are between 30 and 110 minutes

30 = 70 - 2*20

110 = 70 + 2*20

THis means that 30 and 110 minutes is within 2 standard deviations of the mean, which means that at least 75% of these commuting times are between 30 and 110 minutes

8 0

3 years ago

Maria puts $2,500.00 in her money market account earning 8% interest annually. How much interest and how much money would she ha

Gnom [1K]

The correct answer: total interest = $1,784.56 and she would have $4,284.56 after 7 years

7 0

2 years ago

Order from smallest to largest

Daniel [21]

Answer:

They are all one foot high so it's a trick question I think lol

Step-by-step explanation:

Hope this helped lol

5 0

3 years ago

The pool at the park is 18 feet wide how many yardsticks would it take to measure the width of the pool

sattari [20]

6 because 18 divided by 3 equals 6

4 0

3 years ago