27 - 15 = 12
Adding 15 to both sides, we have,
27 - 15 + 15 = 12 + 15
i.e. 27 = 12 + 15
Answer: C [12 + 15 = 27]
To calculate by estimation, round each number to the nearest ten, hundred, ets as the case may be.
Here, rounding to the nearest ten, we have,
267 - 154 = 270 - 150 = 120.
Answer: C
Quotient of 18 and 2 = 18/2 = 9
Sum of 22 and 9 = 22 + 9 = 31
Subtracting the quotient of 18 and 2 from the sum of 22 and 9, we have:
31 - 9 = 22
Answer: D
Answer:
The answer is 5
Step-by-step explanation:
Answer:
She now has 1 apple
Step-by-step explanation:
To get your answer you would subtract 2 from 1 (2-1=?). Which will equal 1. You would do that because she has 2 apples and ate 1 where did that go? It's gone so she will only have 1 more left.
Answer:
36 degrees
Step-by-step explanation:
Ok so wouldnt you have to subtract 54 minus 18? and if so then
Step-by-step explanation:
The height, h in feet, of a rocket is given by, where t is time in seconds.
...(1)
We need to find the maximum height of the rocket and find the time the rocket was in the air. For maximum height, put ![\dfrac{dh}{dt}=0](https://tex.z-dn.net/?f=%5Cdfrac%7Bdh%7D%7Bdt%7D%3D0)
![\dfrac{d(-16t^2+64t+190)}{dt}=0\\\\-32t+64=0\\\\t=\dfrac{64}{32}\\\\t=2\ s](https://tex.z-dn.net/?f=%5Cdfrac%7Bd%28-16t%5E2%2B64t%2B190%29%7D%7Bdt%7D%3D0%5C%5C%5C%5C-32t%2B64%3D0%5C%5C%5C%5Ct%3D%5Cdfrac%7B64%7D%7B32%7D%5C%5C%5C%5Ct%3D2%5C%20s)
So, it will reach its maximum height in 2 seconds.
Now put t = 2 in equation (1) as follows :
![h(2)=-16(2)^2+64(2)+190\\\\=254\ \text{feet}](https://tex.z-dn.net/?f=h%282%29%3D-16%282%29%5E2%2B64%282%29%2B190%5C%5C%5C%5C%3D254%5C%20%5Ctext%7Bfeet%7D)
So, the maximum height of the rocket and find the time the rocket was in the air is 254 feet and 2 seconds respectively.