A+7=0
A+7-7=0-7
A=-7
B+3=7
B+3-3=7-3
B=4
Mrs. Brown's class will earn 30 minutes of recess.
Answer:
It should be
Step-by-step explanation:
<h2><u><em>
B.</em></u></h2><h2>
23 1/4</h2>
Answer:
12.5
Step-by-step explanation: The triangle ABC and its altitude
is represented in the figure below.
<u>Altitude</u> is a segment of line that link a vertex and the opposite side, forming a right angle.
So, because of
, now we have two similar triangles, which means that ratios of corresponding sides are equal:

(1)
This is always true for a right triangle and a altitude drawn to the hypotenuse.
Triangle BDC is also right triangle. So, we can use Pythagorean theorem to determine the missing side.

(2)
Substituting (2) into (1):

We want to find f, so:


f = 7.5
The length of
is



The length of the hypotenuse of triangle ABC is 12.5 units.
NO
no integers are considered irrational numbers.