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natulia [17]
3 years ago
13

You can walk 1 1/2 miles in 1/2 an hour what is your average speed

Mathematics
1 answer:
Nesterboy [21]3 years ago
8 0

Answer:

3 miles per hour

Step-by-step explanation:

If you walk 1.5 miles in .5 of an hour you take 1.5 and divide it by .5 of an hour and you get the speed you were walking

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PLEASE HELP (this is all my points I’ll mark brainlist anything please help)
timurjin [86]

Answer:

I believe that it would be A+C+S but is there more to the question?

Step-by-step explanation:

5 0
3 years ago
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There were 450 students enrolled in a middle school at the beginning of the school year. The number of students enrolled in the
taurus [48]

Answer:

405

Step-by-step explanation:

10% of 450 is 45 and 450-45=405 students

8 0
3 years ago
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Whats the area of a circle that has a 8mm dimeter using 3.14 of pi
djyliett [7]

Answer:

50.24

Step-by-step explanation:

8/2 = 4

3.14 x 4^2 = 50.24

8 0
2 years ago
If f(x) = 2x2 + 1, what is f(x) when x = 3? a.1 b.7 c.13 d.19
prohojiy [21]

<u>Answer:</u>

The value of f(x) = 2x^2 + 1 when x=3 is 19, hence the correct option is ‘d’.

<u>Solution:</u>

A two degree polynomial equation is given in the question.

The equation is:

F(x)=2 x^{2}+1

We need <em>to find the value of f(x) when the value of x is 3. </em>

To solve a question like this we have to substitute the given value of x in the given equation and then simplify it.

Now let's substitute the value of x in the given equation.

F(x)=2(3)^{2}+1

First we square the number 3 and then multiply it with 2 and then add 1.

This is done because of the BODMAS rule, in which multiplication is given higher preference as compared to addition.

On solving the equation we get,

F(x)=2×9+1

F(x)=18+1

F(x)=19.

Therefore the value of f(x) when x=3 is 19.

Hence the correct option is ‘d’.

4 0
3 years ago
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Oscar invests $20,000 in three investments earning 6% ,8% and 10%. He invests $9000 more in the 10% investment than in the 6% in
Hatshy [7]
This problem is mainly concerned with setting up an equation.

let's add the interest rates times their respective investment amounts:

a = (9000 + x)0.10

b = x \times 0.06

c=(20000 - ((9000 + x) + x)) 0.08

simplify:

c = (11000 - 2x) \times 0.08

sum of interest:

1780 = a + b + c

1780 = (9000+x) 0.10 + x 0.06 + (11000-2x)0.08

1780 = 1780 + 0 \times x

0=0

solution:

He does not have any invested in the 6%, while he has 9000 invested at 10% and 11,000 invested at 8%

to check:

9000 \times 0.10 + 11000 \times 0.08

= 900 + 880 = 1780

So this ended up being a trick problem because he does not actually have any invested in the 6% option.
6 0
3 years ago
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