PLEASE HELP I WILL AWARD BRANLIEST - 4 kitchen assistants can prepare 10kg of vegetables in 45 minutes. How long would it take 15 assistants to prepare the same amount?
Answers
Answer:
12 minutes
Step-by-step explanation:
We need to find the total amount of work time to do the job
4 * 45 = 180 work minutes
We now get 15 assistants, so take the work time and divide by the assistants
180 / 15 =12
They will need 12 minutes
Answer:
hi your answer is in the image
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Explanation/Calculation:
You are asking for the rate. To find the rate, divide the 232 (miles) by the 4 (hours) to get 58. Then convert 58 into 58 MILES PER HOUR.
Hope this helped! :)
Answers
means that it ends with 5 or 0
possible ones are
5,10,15,20,25,30,35,40,45,50,55,60,65,70,75,80,85,90,95
groups of 2, will have 1 jelly bean left over
it is not divisble by 2, means it doesn't end with 0 (ending with 0 means it is divisible by 10, and 10 is divisible by 2)
5,15,25,35,45,55,65,75,85,95
groups of 3
not divisble by 3 (a hack to test, is that you add the digits and if the sum is divisble by 3, then the number is divisble), the list below is eliminated numbers divisble by 3
5,25,35,55,65,85,95
if makes group of 2 will have exactly 1 left over
5/3 has remainder of 2, eliminate
25 works so far (2*12=24,3*8=24,4*6=24)
35/4 has remainder of 3, eliminate
55/4 has remainder of 3, eliminate
65/3 has remainder of 2, eliminate
85 works
95/3 has remainder of 2,eliminate
the ones that work are 25 aand 85
she could have 25 or 85 jelly beans
12, 24, 36, 48, 60, 72, 84, 96 (we stop listing here because the number of jelly beans is less than 100)
this also means the possible number of jelly beans she can have is the numbers in the previous list plus 1 (remember it is x-1 NOT x that is the common multiple of 2, 3, 4):
13, 25, 37, 49, 61, 73, 85, 97
now we use our last clue which is if the teacher groups her jelly beans in groups of 5 there will be none left over. this is equivalent to saying that the number of jelly beans is a multiple of 5. we look through our 2nd list and find that only 25, and 85 is a multiple of 5. therefore the number of jelly beans the teacher can have is 25 and 85.
note that we took the problem in steps and used process of elimination to determine which of the natural numbers less than 100 can be the answer to the question. this is a very very good strategy in problem solving, but it can be challenging to know what order to take the "steps" but that can be mastered with patient practice.
let me know if you have any questions!!!!
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7) B
8) C
9) A
10) C and D
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x²+3x = 9x - 8
Subtract 9x on both sides
x² - 6x = -8
Add 8 on both sides
x² - 6x + 8 = 0
Now you need to find the factors of 8(numbers that multiply to equal 8) that add or subtract to -6.
Factors of 8: 1, 2, 4, 8
2 and 4 add up to 6, if they are both negative they equal -6.
(x - 2)(x - 4) = 0
x - 2 = 0
x = 2
x - 4 = 0
x = 4
x = 2, x = 4
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Since there is two negative sign, it turns into positive meaning the -12 becomes positive 12 and the -18 stays same. So -18+12=-6 because 18 is bigger than 12 and it's negative so the final answer should be negative.
Hint: when you see two negative sign just turn them into plus sign.
Since (-*-)= + sign
So -18+12 will be equal to -6
1.)b+4=a b=...
2.)4d=c d=...
3.)m-2=4k m=...
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2)d=c/4
3)m=4k+2 =2(k+1)
2.d=c:4
3.m=4k+2