Answer:
always true
Step-by-step explanation:
complement equals that angle plus another one adds to 90. If you know that it's less than 90 degrees, then you subtract it from 90 to get the other angle which is the complement. Hope this helps!
Let X & Y be the two integers
X+Y=18 Y = 18-X
XY = 80
We can substitute 18-X for Y in the equation XY = 80
X(18-X) = 80
Distributing
18X - X2 = 80
Subtract 80 from both sides so that the equation is equal to 0
-X2 + 18X - 80 = 0
Multiply (or divide by -1 so that the leading coefficient is positive, not negative)
X2 - 18X + 80 = 0
We can factor this quadratic
(X-10)(X-8) = 0
Setting each factor equal to 0 we can solve for X.
X-10 = 0 X-8 = 0
X = 10 X = 8
The two integers are 8 and 10.Answer:
Step-by-step explanation:
15 minutes is 1/4 of an hour
How many 15 minutes are in 2 hours?
There are 8 so:
45 x 8 = 360
360 pages
Answer:
<u>Similarities</u><u> between a parallelogram and a rectangle</u>
- Quadrilateral (4-sided, two dimensional shape)
- Opposite sides are equal and parallel to each other
- Sum of all the interior angles is 360°
- Diagonals bisect each other
- Adjacent angles are supplementary (sum to 180°)
- Opposite angles are equal
<u>Differences</u><u> between a parallelogram and a rectangle</u>
- A rectangle has four equal interior angles (each are 90°) whereas only the opposite angles in a parallelogram are equal.
- The diagonals of a rectangle are equal in length, whereas the diagonals of a parallelogram are not equal in length.
All rectangles are parallelograms since the opposite sides of a rectangle are parallel, but all parallelograms are not rectangles.
