Answer:
The speed of plane B relative to plane A is 392.25 mph.
Step-by-step explanation:
Speed of plane A = 440 mph north east
speed of plane B = 550 mph north
speed of plane A = ![440(cos 45 \widehat{i} + sin 45 \widehat{j})=311.1 \widehat{i} + 311.1 \widehat{j}](https://tex.z-dn.net/?f=440%28cos%2045%20%5Cwidehat%7Bi%7D%20%2B%20sin%2045%20%5Cwidehat%7Bj%7D%29%3D311.1%20%5Cwidehat%7Bi%7D%20%2B%20311.1%20%5Cwidehat%7Bj%7D)
speed of plane B = ![550 \widehat{j}](https://tex.z-dn.net/?f=550%20%5Cwidehat%7Bj%7D)
Speed of plane B with respect to plane A is
= speed of plane B - speed of plane A
![=550 \widehat{j} - 311.1 \widehat{i} - 311.1 \widehat{j}\\\\=-311.1 \widehat{i} + 238.9 \widehat{j}\\\\= \sqrt{311.1^2 + 238.9^2 }\\\\=392.25 mph](https://tex.z-dn.net/?f=%3D550%20%5Cwidehat%7Bj%7D%20-%20311.1%20%5Cwidehat%7Bi%7D%20-%20311.1%20%5Cwidehat%7Bj%7D%5C%5C%5C%5C%3D-311.1%20%5Cwidehat%7Bi%7D%20%2B%20238.9%20%5Cwidehat%7Bj%7D%5C%5C%5C%5C%3D%20%5Csqrt%7B311.1%5E2%20%2B%20238.9%5E2%20%7D%5C%5C%5C%5C%3D392.25%20mph)
I think it is not finished you need to tell me want b means.
The area of a parallelogram is base X height.
so here will be 20 x h = 300
therefore the height is 15
Answer:
1/3 = 0.333
You can use a calculator and it should come out into a decimal.
Note:
/ = divide
Note the squares...
13 is possible because it is a sum of two squares (integers) 9 + 4 .. use (0,3) & (2,0) ... get the square roots and place on different coordinate axes... for a simpler value.
but there is none for 15...
there is one for 18 ...
18 = 3^2 + 3^2 ... try (0,3) ,(3,0) , (3,6), (6,3).