Answer:
∠ STR = 64°
Step-by-step explanation:
Since RS = ST then the triangle is isosceles and the base angles are congruent, that is
∠ STR = ∠ SRT , then
∠ STR =
=
= 64°
Answer:
109.8
Step-by-step explanation:
549/5 =109.8
Mean: add A1+A2+A3+A4+……..+An then divide by 2 means 8+5+7+10+15+21=66/2=33
2x +3x + 25 = 5x - 15
5x + 25 = 5x - 15
5x - 5x = -15 - 25
0 ≠ -35
In four hours, he drives: = 252
So, Unit rate = 252/4 = 63 mph
In seven hours, it would be = 63 * 7 = 441 miles
Hope this helps!