Answer:
20 ≥ x
Step-by-step explanation:
Alex has $20 or less to spend at the store
Answer:
6 pounds
Step-by-step explanation:
Let the can weigh x pounds
Let the milk weigh <em>y</em> when full, therefore half is ![\frac{y}{2}](https://tex.z-dn.net/?f=%5Cfrac%7By%7D%7B2%7D)
Now we for 2 simultaneous equations:
....(i)
.... (ii)
we solve by eliminating the x in both equation throug subtraction
![x - x + y- \frac{y}{2} =70-38\\y- \frac{y}{2} = 32\\\frac{y}{2} = 32\\y=2(32)\\y=64\\x+y=70\\x+64=70\\x=6](https://tex.z-dn.net/?f=x%20-%20x%20%2B%20y-%20%5Cfrac%7By%7D%7B2%7D%20%3D70-38%5C%5Cy-%20%5Cfrac%7By%7D%7B2%7D%20%3D%2032%5C%5C%5Cfrac%7By%7D%7B2%7D%20%3D%2032%5C%5Cy%3D2%2832%29%5C%5Cy%3D64%5C%5Cx%2By%3D70%5C%5Cx%2B64%3D70%5C%5Cx%3D6)
(I)
firstly , we will find maximum and minimum y-value
we can see that
maximum value is 5
minimum value is -5
so, we can find amplitude
![A=\frac{5-(-5)}{2}](https://tex.z-dn.net/?f=%20A%3D%5Cfrac%7B5-%28-5%29%7D%7B2%7D%20%20)
..........Answer
(II)
we know that
wave length is the length of one wave
we can see that from B to F , there is one wave
and we are given it's length as 20cm
so, wavelength is 20cm......Answer
(III)
we know that
![velocity=wavelength*frquency](https://tex.z-dn.net/?f=%20velocity%3Dwavelength%2Afrquency%20)
we are given
frequency =100hz
wavelength =20cm
now, we can find velocity
![velocity=20*100cm/sec](https://tex.z-dn.net/?f=%20velocity%3D20%2A100cm%2Fsec%20)
............Answer
Answer:
in what there is not question
144 because 1 ft = 12 inches and 12 x 12 equals 144