We know that a supplementary angle is 180 degrees because they add up to 180 degrees.
To solve for x:
Add the whole numbers
7x + 33 + 70 = 180
Subtract 103 on both sides.
7x + 103 = 180
-103 -103
Divide 7 on both sides to get x alone.
7x = 77
--- ---
7 7
x = 11
Check:
7(11) + 33 + 70 = 180
77 + 33 + 70 = 180
110 + 70 = 180
180 = 180
The angle
7(11) + 33
77 + 33
equals to
110
Which means that the angle is 110 degrees.
23.
2/5 + 1/2
you find the common denominator
which is 10
4/10 + 5/10
you add the fractions
9/10
he has completed 9/10 of the questions in the first 25 minutes
Answer: After 210 seconds they with next flash at the same time.
Step-by-step explanation:
Given: Ardem has two lights.
One flashes every 15 seconds the other flashes every 42 seconds.
If they started flashing at the same time, then the number of seconds after that they with next flash at the same time = LCM (15, 42) [LCM - Least common multiple]
Prime factorization of 15 = 3 x 5
Prime factorization of 42 = 2 x 3 x 7
Then, LCM (15, 42) = 2 x 3 x 5 x 7 = 210
i.e. After 210 seconds they with next flash at the same time.
B and E are the correct choices