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3 years ago

How do you simplify 2a+3b+a+5b

2 answers:

7 0

First, you group the numbers which have the same radicals: 2a+a+3b+5b
Then, you add the same radical numbers: 3a+8b
you keep adding till you can't add numbers anymore
P.S. a = 1a
P.S. you can't add numbers with different radicals
Hope this helps :D

grin007 [14]3 years ago

4 0

$2a+3b+a+5b\to\boxed{3a+8b}$

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Sarah has $100 in her saving account. She saves $50 per month. How much will she have in x amount of months?

vitfil [10]

A month =$50
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2 years ago

Let A and B be sets with cardinal numbers , n(A) = a and n(B) = b respectively . Decide whether the statement is true or false.

olya-2409 [2.1K]

Answer:

True

Step-by-step explanation:

$A\cup B=A\cup(A-B)\\\\A\ and\ A-B\ are\ disjoint\ that\ means\ there\ is\ no\ common\ element\ in\ these\ two.\\\\n(A\cup B)=n(B\cup(A-B))\\\\n(A\cup B)=n(B)+n(A-B)\ \ \ \ \ \ \ as\ for\ disjoint\ set\ P,Q\ n(P\cup Q)=n(P)+n(Q)\\\\(n(P-Q)=n(P)-n(P\cap Q))\\\\n(AUB)=n(B)+n(A-B)\\\\n(AUB)=n(B)+n(A)-n(A\cap B)\\\\n(AUB)=n(A)+n(B)-n(A\cap B)\\\\Hence\ given\ statement\ is\ true$

4 0

2 years ago

Janelle has 4 hours to spend training for an upcoming race. She completes her training by running full speed the distance of the

natima [27]

If the amount of time taken to go said distance is x and the amount of time taken to go back said distance is y, then the amount of miles total is 7x+3y due to that for every hour, she adds 7 miles when going there and 3 miles for walking back. In addition, since the total amount of time is 4 hours, x+y=4 as the total time spent as well as 7x=3y due to that they're the same distance.
x+y=4
7x=3y
Dividing the second equation by 7, we get x=3y/7. Plugging that into the first equation, we get 3y/7+y=4=10y/7 (since y=7y/7). Multiplying both sides by 7 and then dividing both by 10, we get 28/10=2.8=y in hours. Since 0.1 hours is 60/10=6 minutes, and 0.8/0.1=8, 6*8=48 minutes=0.8 hours, meaning that she should plan to spend 2 hours and 48 minutes walking back

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2 years ago

(3/1/2 - 9/3/4) / (-2.5)=

Alex73 [517]

<h3>Answer :</h3>

$\: \: \:$

$= \rm \large \frac{3 \frac{1}{2} - 9 \frac{3}{4} }{ - 2.5}$

$\: \:$

$= \rm \large \frac{ \frac{7}{2} - 9 \frac{3}{4} }{ - 2.5}$

$\: \:$

$= \rm \large \: \frac{ \frac{7}{2} - \frac{39}{4} }{ - 2.5}$

$\: \:$

$= \rm \large \: \frac{ \frac{25}{4} }{ - 2.5}$

$\: \: \:$

$= \rm \large \: \frac{5}{2}$

$\: \: \:$

6 0

1 year ago

In a game, Janeesa started with 0 points. She then earned 50 points, lost 80 points and earned 10 points. Which number line show

umka2103 [35]

Answer:

-20

Step-by-step explanation:

If Jeneesa started with, 0 points and she earned 50, then she would have 50. If she lost 80 points, she would go into the negatives. She would be at -30, and when she earned 10 more points, she would be at -20.

I don't know what your options look like, but look at the one(s) with -20 at the end and figure out what one best fits my explanation (and the numbers I use)!

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2 years ago