His average speed is 67.5 mph.
Answer:
a. ∆BAC & ∆DEC
b. they have a vertical angle because they both share c, and <a = <e. If two angles are congruent, the third must be congruent as well.
c. √90 = 3√10
<h2>
Answer:</h2>
<u>1.69.</u>
<h2>
Step-by-step explanation:</h2>
<h3>Multiply the values.</h3>
<h3>Result.</h3>
1.69.
Suppose there are 19x students, 1x teachers
19x+1x=400
20x=400
x=20
there are 20 teachers and 380 students.
For this case we must solve the following equation for x:
We apply distributive property to the terms of parentheses:
We subtract 5x on both sides of the equation:
Suamos 5 on both sides of the equation:
Answer: