55, and the reason why bc the hole circle is 360 and so grab 360 - 170-80 equals to 110 right and we have to angles left so we divide. 110/2 equals 55
Answer:
23.9 (rounded)
Step-by-step explanation:
First find the mean of all the numbers
this is 79.3
then find the distance from every number from the mean
15- 64.3
60- 19.3
90- 10.7
90- 10.7
100- 20.7
100- 20.7
100- 20.7
then find the average of the distances
which is 23.9
hope this helps
A(n) = a(n-1)+9 means that we add 9 to the previous term to get the next term. Therefore the common difference is d = 9 this sequence is arithmetic.
The first term is a(1) = 21
Plug those two values into the arithmetic formula below and simplify
a(n) = a(1) + d * [ n - 1 ]
a(n) = 21 + 9 * [ n - 1 ]
a(n) = 21 + 9*n + 9*(-1)
a(n) = 21 + 9n - 9
a(n) = 9n+12
Answer is choice D
Answer:
Step-by-step explanation:
A triangle has three angles, and their measures add up to 180 degrees.
An isosceles triangle has at least 2 congruent sides, and the angles opposite the congruent sides are congruent.
This triangle has one angle of 40 deg, and two angles that measure the same; call the measure of each base angle x.
x + x + 40 = 180
2x + 40 = 180
2x = 140
x = 70
The base angles measure 70 deg.
