Answer:
a = - 24 ; n =25
a = 28 ; n = 25
Step-by-step explanation:
n = l - a/d + 1
d = common difference = 4
Last term = l = 72
n = 72 - a/4 + 1
4n = 72 - a + 4
4n = 76 - a
a = 76 - 4n - - - (1)
Sum of terms :
Sn = n/2(a + l)
Sn = 600
600 = n/2(a + 72)
1200 = n(76-4n +72)
1200 = 148n - 4n
4n² - 148n + 1200
Solving the quadratic equation :
Roots of n are :
12 and 25
From (1)
n = 12
a = 76 - 4(12) = 28
n = 25
a = 76 - 4(25) = - 24
Hence,
a = - 24 ; n =25
a = 28 ; n = 25
Answer:
22 2/5
Step-by-step explanation:
(56/1)*(2/5)
Multiply the numerators and denominators
112/5
Then simplify
22 2/5
Answer:
Not a function
Step-by-step explanation:
Because the line is vertical, it is not a function.
The answer to the question is 25
Answer:
84
Step-by-step explanation:
sum of interior angles of a pentagon is 540. A triangle is 180, then for each side you add another 180, so a square would be 360 and a pentagon is 540
Sum up all given sides
131+108+107+110=456
subtract this number from 540
540-456=84
x degree= 84