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jeka94
3 years ago
15

What other compatible numbers could you use for 428 and 286

Mathematics
1 answer:
kaheart [24]3 years ago
4 0
How about raising 286 up by 14 to 300 and compensating by lowering 428 by the same 14 Since I know that 14 + 14 is 28  then 28-14 is 14
So 428 - 14 = 414
So now I have 414 + 300 which I can do mentally - the answer is 714 and is also the answer to the original problem 428 + 286

Compensation works very well - bring one number up or down to a rounded number and compensate by doing the opposite to the other  - instead of 199 + 457 - try 200 + 456
Same answer and because one of the numbers is nicely rounded, it is easy to add the other. 

One more:  207 + 182  becomes 200 + 189 =389   I lowered one by 7 and raised the other one by the same 7.

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Do you need all the math in the world
zubka84 [21]

Answer:

Yes!

Step-by-step explanation:

You need math in the world because most jobs require math.

6 0
2 years ago
A Best Eastern Motel is a regional motel chain. Its rooms rent for $90 per night, on average. The variable cost is $40 a room pe
Vlad1618 [11]

Answer: break even point  (y) = 24000

Step-by-step explanation:

This is quite simple to solve,

We will take a step by step calculation.

let us begin;

Given that the Room rent per night is = $90

Also the variable cost per night = $40

Total fixed cost = $1200,000

Now we are asked to solve for the Break even point;

Remember that at break even point, the Revenue = cost

Say the required revenue from renting y rooms R = $90y

The cost of renting y rooms = C = $ (40y + 1200,000)

therefore from this we have the Break even point as

$90y = $ (40y + 1200,000)

where y = 24000

cheers i hope this helps!!!!!!

4 0
3 years ago
Read 2 more answers
How do you work out 5/6y-2=8
aliya0001 [1]
5/6y-2=8
       +2  +2
Add the reciprocal to cancel out the twos andd 8+2=10
so you have left 5/6y=10 and you'll take the reciprocal of 5 divided by 6 times five and cancels the 5/ out and also multiply 10*5 and you're left with 6y=50 then you just divide by six and there you go you have y=12

hope this helped

3 0
3 years ago
Read 2 more answers
On a test, you earn 92% of the possible points by correctly answering 6 five-point questions and 8 two-point questions. How many
olya-2409 [2.1K]

Step-by-step explanation:

(6×5)+(8×2)=46

92℅=46points

100℅=x

criss cross

<u>92℅x=46</u>

<u>9</u><u>2</u><u>℅</u><u>.</u><u> </u> 92℅

and this is the answer

8 0
3 years ago
Read 2 more answers
4 2/5 = _?_ - 1 2/3.
Salsk061 [2.6K]
The answer is 1 2/3+4 2/5=91/15
6 0
3 years ago
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