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krok68 [10]
2 years ago
6

Rohan and Amit can build a tank in 12 days while Amit and Sohan in 15 days and Rohan and Sohan in 20 days. How long would each t

ake to do the same work?
find how long each do​
Mathematics
1 answer:
kolezko [41]2 years ago
4 0

Answer:

Rohan-6

amit-6

sohan-9

Step-by-step explanation:

12/2=6 rohan And amit

amit=6 so solan has to take 9

10

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5|x3 - 21 + 7 when x = -2.
Tomtit [17]

Answer:

-422

Step-by-step explanation:

51[-2]³ - 21 + 7

51[-8] - 14

-408 - 14 = -422

I am joyous to assist you anytime.

6 0
3 years ago
Ben and Josh went to the roof of their 40-foot tall high school to throw their math books off the edge.
krok68 [10]

Answer:

  • Josh's book lands first
  • Ben's lands about 0.648 seconds later

Step-by-step explanation:

Using the given equation for v=60 and s=40, the height of Ben's book is ...

  h(t) = -16t² +60t +40

We want to find t when h(t) = 0, so we're looking for the solution to ....

  0 = -16t² +60t +40

Using the quadratic formula, we find the positive value of t to be ...

  t = (-60 -√(60² -4(-16)(40)))/(2(-16)) = (15 +√385)/8 ≈ 4.3277

__

Similarly, the height of Josh's book is ...

  0 = -16t² +48t +40

  t = (-48 -√(48² -4(-16)(40)))/(2(-16)) = (12 +√304)/8 ≈ 3.6794

__

The time before Josh's book lands is shorter by ...

  4.3277 -3.6794 ≈ 0.6482 . . . . . seconds

Josh's book reaches the ground first, by about 0.648 seconds.

3 0
3 years ago
What is the equation for Table A ?<br> What is the equation for table B?
leva [86]

10. She isn't tall; that's why she can't reach that shelf.

11. They bought the cheapest computer because they didn't have any more money.

12. You eat too many sweets and that's the reason your clothes don't fit.

13. I went to sleep very late last night because I was so excited.

14. I don't know the answer, that's why I can't help you.

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3 0
2 years ago
Perform the indicated operation.(3/a+2) + (4/a-5)
kipiarov [429]

Answer:

\frac{7(a-1)}{(a+2)(a-5)}

Step-by-step explanation:

To solve this operation we need to find the common multiple of both denominators and solve for a.

\frac{3}{a+2} + \frac{4}{a-5} =\frac{3(a-5)+4(a+2)}{(a+2)(a-5)} =\frac{3a-15+4a+8}{(a+2)(a-5)} =\frac{7a-7}{(a+2)(a-5)} =\frac{7(a-1)}{(a+2)(a-5)}

Thus, the solution is 7(a -1) / (a+2)(a-5)

8 0
3 years ago
Would you please help me? Thanks.
Butoxors [25]
The best answer is D.

According to the pythagorean theorem, a^2+b^2=c^2 in a right triangle where a and b are the legs and c is the hypotenuse.

The diagram given gives the length of both legs, so plug it into the equation to get c^2= 24^2+45^2
7 0
3 years ago
Read 2 more answers
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