<span>Compatible numbers are numbers in a problem that are easy to compute mentally. They are numbers that are close in values to the actual number and this makes it easy to perform mental arithemetics. Compatible numbers can be rounded up to the nearest tens, twenty, etc, in order to make computation easier.</span>
Answer:
x = 17.51
Step-by-step explanation:
Since this is a right triangle, we can use trig functions
tan theta = opp/ adj
tan 35 = x/25
25 tan 35 =x
x=17.50518
Answer:
A = 1/2 in
B = 2 1/4 in
C = 3 3/4 in
D = 5 in
Step-by-step explanation:
Just count up by 1/4, each mark = 1/4 inch more
hope this helps :)
24 rounds to 25 and 80 stays the same
I'll tell you more: when you fix the perimeter of the rectangle, the one with the maximum area is always the square with that perimeter. Here's the proof.
Given a perimeter 2P, all rectangles with that perimeter have sides x and y such that
The area is the product of the dimensions, so
The maximum of this parabola is found by setting its derivative to zero:
which implies
So, the maximum area is achieved when x=y, i.e. when the rectangle is actually a square.
So, the square with perimeter is 3131 has side length