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2 years ago

The scale on a map is 1 in to 40 mi find the distance for 5 1/2 in

Mathematics

1 answer:

Lady_Fox [76]2 years ago

5 0

5.5 inches x 40 miles = 220 miles

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How does the order of steps in solving an equation relate to order of operations

Akimi4 [234]

If you dont follow the right steps in the right order or properly, you won't end up with the right answer:
For example 3 x 5 + 7
If you do multiplication then add you get 22 which is correct.... but!!
If you add then do multiplication you get 36 which isn't right

Remember always follow PEMDAS
P-Parenthesis
E-Exponents
M or D- Multiplication or division (go left to right)
A or S- Addition or Subtraction (go left to right)

5 0

4 years ago

Use the pi key on a scientific or graphing calculator to compute the percent of error of the approximation of pi, 3.14, to the v

Kitty [74]

Percent error is calculated as $\frac{approximation-theoretical}{theoretical}*100$ .
The approximation in this case is 3.14, and the theoretical or actual value is pi.

Using the formula, the percent error will be:
$\frac{3.14- \pi }{ \pi }*100$ = -0.0507%

4 0

3 years ago

In 2014, the percentage of the U.S population who was foreign-born was 13.1. Choose 60 U.S residents at random. Find the mean, v

makkiz [27]

Answer:

Hence Mean ,variance ,standard deviation who are foreign born are as

8, 6.83 ,2.613 respectively

Step-by-step explanation:

Given:

probability of success for foreign-born is 13.1 % p=0.131

probability of failure= q=1-0.131=0.869

n=60

To Find:

Mean ,variance and standard deviation

Solution:

We have here binomial distribution as probability for success (p)and number of trails are given (n).

So we know that formula for mean ,variance and standard deviation of binomial distribution are as follows ,

p=0.131

q=0.869

n=60

So Mean=μ= n*p

=60*0.131

=7.86

Hence mean will be 7.86 which approximately 8 persons.

Now for Variance=n*p*q

=60*0.131*0.869

=6.830

So variance will be 6.83

And for Standard deviation=Sqrt(variance)=Sqrt(n*p*q)

=Sqrt(6.83)

=2.613

Hence Mean ,variance ,standard deviation who are foreign born are as

8, 6.83 ,2.613 respectively.

7 0

3 years ago

Solve for x: 5 − (x + 5) > −2(x + 4)

andrew-mc [135]

Answer:

The answer is

$\huge x > - 8$

Step-by-step explanation:

$5 − (x + 5) > −2(x + 4)$

<u>First of all expand the terms in the bracket</u>

That's

$5 - x - 5 > - 2x - 8 \\ - x > - 2x - 8$

<u>Add 2x to both sides</u>

$- x + 2x > 2x - 2x - 8 \\ x > - 8$

We have the final answer as

$x > - 8$

Hope this helps you

8 0

3 years ago

Read 2 more answers

Bella thinks there are four more tens in 45 than in 15. Is she correct? explain your answer.

artcher [175]

I'm not the smartest but...

No, there are 3 more tens because 45-15=30
30/10 = 3

3 0

4 years ago