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2 years ago

Simplify: a+2a+3a+4a can somebody please help me

Mathematics

2 answers:

VARVARA [1.3K]2 years ago

8 0

Answer:

10a

Step-by-step explanation:

1a+2a+3a+4a=10a

MariettaO [177]2 years ago

8 0

Answer:

10a

Step-by-step explanation:

In this expression, when simplifying, it is key to always combine like terms.

In this case, as every term has a variable of ‘a’, you can add together the coefficient of ‘a’. A coefficient is a number infront of a variable (it can also sometimes be a variable).

Also in this expression, you might be wondering why you got the solution 9a instead.

The first ‘a’ in this expression seems as if it has no coefficient, but it actually does! It has a one in front of it! Because 1 time ‘a’ should be equal to ‘a’.

Therefore, your final answer is 10a.

Happy Learning :D

(Note :You can only do this when they have the same variable)

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A family eats at restaurant. the bill is $42. the family leaves a tip and spends. $49.77.

Mrac [35]

What is the question?

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2 years ago

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seven different gifts are to be distributed among 10 children. How many distinct results are possible if no child is to receive

Alik [6]

Answer:

120 distinct results are possible if no child is to receive more than one gifts.

Step-by-step explanation:

When the order is not important, we use the combination formula:

$C_{n,x}$ is the number of different combinatios of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

The order is said to be not important if for example, John receiving the Buffalo Bills jersey and then Laura receiving the Cleveland Browns jersey is the same as Laura receiving the Cleveland Browns jersey before John receives the Buffalo Bills jersey.

In this problem, we have that:

Combinations of 7 from a set of 10 elements. So

$C_{n,x} = \frac{n!}{x!(n-x)!}$

$C_{10,7} = \frac{10!}{7!(3)!} = 120$

120 distinct results are possible if no child is to receive more than one gifts.

6 0

2 years ago

Jill drives 75 1/3 miles every hour how many miles can Jill Drive in 8 and 3/4 hours

11Alexandr11 [23.1K]

First, multiply 75 by 8 to get 600.
Then multiply 1/3 by 8 to get 8/3 or 2 2/3.
Add those together to get 602 2/3.

Next multiply 1/3 by 3/4 by multiplying the numerator by 3 and the denominator by 4. That is 3/12. Also known as 1/4.
Multiply 75 by 3/4 by dividing it by 4 then multiplying it by 3. That is 56 1/4.
Add 56 1/4 and 1/4 together to get 56 1/2.

Lastly, add together 56 1/2 and 602 2/3.
Convert the fractions to sixths.
56 3/6 + 602 4/6 = 659 1/6 miles
Hope this helps!

6 0

2 years ago

9/11=?/22<br> A.12<br> B.4<br> C.9<br> D.18

Yanka [14]

9/11 is equal to 18/22, so then D.

8 0

3 years ago

In ΔEFG, the measure of ∠G=90°, the measure of ∠F=23°, and FG = 31 feet. Find the length of GE to the nearest tenth of a foot.

alexira [117]

Answer:

x=13.1587≈13.2 feet

6 0

2 years ago