9514 1404 393
Answer:
72 kph
Step-by-step explanation:
The first sentence tells you the speeds are proportional. So, you can write the proportion ...
kph/mph = 120/75 = x/45
Multiplying by 45 gives x:
x = (45)(120/75) = 72
72 kph is 45 mph.
Answer:
4×5
Step-by-step explanation:
Four is being added five times by itself, so it is similar to being multiplied 5 times. I hope this helps!
Answer:
x= ± sqrt [ y/a]
Step-by-step explanation:
y = ax^2
y/a = x^2
x^2 = y/a
x= ± sqrt [ y/a]
The figure is a parallelogram, and in a parallelogram, the lower side and the upper side have the same length. Also, the left side and the right side have the same length. This is shown in the following image:
The red sides are equal, and the blue sides are equal.
Thus, since the blue sides are equal, we can use the following equation to find x:

And since, once we know x, we can know the length of JK, this is the equation that we can use to find JK.
Answer:
7x=3x+14