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Dvinal [7]
2 years ago
15

Give step by step explanation to this question​

Mathematics
1 answer:
Keith_Richards [23]2 years ago
5 0

Answer:

0.02km per 0.00027777 hours

Step-by-step explanation:

20/1000km = 0.02 km

1/3600 = 0.00027 repeater

0.02km per 0.00027777 hours

what they are doing is converting meters per second to km per hour. To change meters to km, you divide by 1000, to change seconds to hours you divide by 3600.

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Write the expression 2a+b in the form of a fraction with the given denominator. Check if the domain of the expression changed. I
Ymorist [56]

Answer:

See below

Step-by-step explanation:

I will assume the given denominator is 3a as there is nothing attached to the statement.

Lets first look at the domain of 2a+b. As it is a polynomial with unknowns a and b, we know it has its domain in all real numbers for both  a and b as every polynomial does. For verifying it replace a and b by any real number you can think of.

Domain = a, b belonging to R

Now, if we divide 2a+b by 3a we will have:

(2a+b)/3a

As know we don not have a polynomial we cant state that the domain will still be all the real numbers for sure. We need to go further.

We have a fraction and as every fraction the denominator CAN'T be equal to 0, so 3a MUST be different to 0. This means that a MUST be different to 0. So, now our domain changes:

domain' = a, b belonging to R and a different to 0.

6 0
3 years ago
Need 78 pieces of wood 29 cm long. Boards are 6 m long. How many boards are needed?
Wittaler [7]

I believe the answer is 4 because 6m/29= 20.6897 and so then you do 20.6897 x 3= 62.0691. So 3 is too small so do 20.6897x 4= <span>82.7588. 82 >78 so the answer is that you need 4 boards.
</span>

5 0
3 years ago
E=300-10 (30)<br> How to solve it step by step
Zepler [3.9K]

Answer:

Step-by-step explanation:

e = 300-10(30)

e = 300 - 300

e = 0

6 0
3 years ago
Brandon buys a radio for $43.89 in a state where the sales tax is 7percent
kkurt [141]

Answer:

$3.07 in taxes

Step-by-step explanation:

You multiply 43.89 by .07 and the number you get is 3.07 and that represents the taxes. The total would be 46.96

6 0
3 years ago
Read 2 more answers
A bag of marbles contains 16 red, 10 green, and 5 blue marbles. Suppose that two marbles are drawn without replacement. What is
pogonyaev

Answer:

16/31, 51.612903225807%

Step-by-step explanation:

7 0
3 years ago
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