Answer:
<H = 40
Step-by-step explanation:
Complementary angles add to 90 degrees
2x+10 + x+20 = 90
Combine like terms
3x+30 = 90
Subtract 30
3x+30 -30 = 90-30
3x = 60
Divide by 3
3x/3 = 60/3
x = 20
<H = x+20 = 20+20 = 40
Answer:
45 degrees
Step-by-step explanation:
A straight line is an angle with a measure of 180°, but becasue it looks like we have two angles that create the 180° angle, therefore, it is a supplementary angle.
Knowing this
2X = 90° (right angle)
so (2X) + (2X) = 180° (supplementary angle)
Therefore, to find X you can do
2X = 90
divide by 2 on both sides (to isolate the variable we are trying to find which is X)
and you get....
X= 45 becasue 2 times 45 equals 90
answer: X=45°
Answer:
B
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
Answer:
The nth term is given by: 
The 30th term is 78.
Step-by-step explanation:
Arithmetic sequence:
The nth term of an arithmetic sequence is given by:
In which 
is the first term and d is the common difference between terms.
-9, -6, - 3,0
This means that 
. So
30th term:
The 30th term is 78.
