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3 years ago

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

Mathematics

2 answers:

VARVARA [1.3K]3 years ago

8 0

Answer:

10a

Step-by-step explanation:

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

MariettaO [177]3 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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Answer both please<br><br> Brainliest for correct

Lana71 [14]

Answer:

28 centimeters a year, 5.5 years until 344 centimeters

Step-by-step explanation:

I did the calculations, forgive me if I am wrong.

8 0

3 years ago

On the first play of the game, the Wildcats gained 8 yd. What integer represents a gain of 8 yd? Enter your answer in the box.

lina2011 [118]

Answer:

Step-by-step explanation:

They gained 8 yards so it is +8.

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4 years ago

What is y+4=9 what is y?

amid [387]

Answer:

$y = 5$

Step-by-step explanation:

Subtract the 4 from 9

5 0

4 years ago

Read 2 more answers

Three pipes A, B and C take 24, 36 and 32 hours to fill a pool, respectively. How long would it take the three pipes to fill the

Murrr4er [49]

Answer:

12 hours

Step-by-step explanation:

Time taken by pipe A = 24 hours

Time taken by pipe B = 36 hours

Time taken by pipe C = 32 hours

To find:

How long would it take the three pipes to fill the pool if pipe B is turned on 3 hours after pipe A and pipe C is turned on 1 hour after pipe B?

Solution:

First of all, let us assume the total capacity of the pool.

Let us take LCM of 24, 36 and 32.

LCM of 24, 36 and 32 = 288

Let the total capacity of the pool = 288 units

Total units filled by pipe A in one hour = $\frac{288}{24} = 12\ units$

Total units filled by pipe B in one hour = $\frac{288}{36} = 8\ units$

Total units filled by pipe C in one hour = $\frac{288}{32} = 9\ units$

Now, for the first 3 hours, only pipe A operates, so units filled in first three hours = $12\times 3 =36\ units$

For the next one hour, A and B both operate together, so units filled in the next 1 hour = 12 + 8 = 20 units

Total number of units filled in 4 hours = 36 + 20 = 56 units

Units to be filled to completely fill the pool = 288 - 56 = 232 units

Now, after the 4th hours, all the pipes operate together.

So, number of units filled in each hour = 12 + 8 + 9 = 29 units

Time taken to fill 232 units = $\frac{232}{29} = 8\ hours$

Total time taken = 4 + 8 = <em>12 hours</em>

8 0

3 years ago

Giving brainliest to whoever can accurately solve these questions first.

lesantik [10]

1. The amount of money in the account after 10 years is 42,317.96 dollars.

2. it will take Pamela and Kevin 7.5 hours to complete the task together

<h3>How to find compound interest?</h3>

Question(1)

Using compound interest formula,

$A = p(1 + \frac{r}{n} )^{nt}$

where

p = principal
r = rate
n = number of times
t = time

Therefore,

p = 30,000

r = 3.5% = 0.035

t = 10

n = 1

Therefore,

$A = 30000(1+\frac{0.035}{1} )^{1X10}$

A = $42,317.96

Question 2:

Pamela takes 12 hours to complete a task.

Kelvin takes 20 hours to complete same task.

The time it will take both of them can be computed as follows:

using rate principle,

let

x = time it will take both of them to do the work together.

$\frac{1}{x}=\frac{1}{12} + \frac{1}{20}$

$\frac{1}{x}=\frac{20+12}{240}$

$\frac{1}{x}=\frac{32}{240}$

cross multiply

240 = 32x

x = 240 / 32

x = 7.5 hours

Therefore, it will take Pamela and Kevin 7.5 hours to complete the task together

learn more on compound interest and rate here: brainly.com/question/18104604

#SPJ1

3 0

2 years ago