Answer:
-950
Step-by-step explanation:
Arithmetic sequence=a+(n-1)d
a=first number
n=nth term
d=difference
a=25
n=66
d=-15
So let's solve
25+(66-1)(-15)
25+(65)(-15)
25-975
-950
So the 66th terms is -950
Answer:
D(3;-2).
Step-by-step explanation:
1)
2) according to the formulas above:
3) finally, D(3;-2).
Assume that the two angles are x and y.
We are given that:
One angle is 44 times the other angle
This means that:
x = 44y .......> equation I
We are also given that:
The two angles are complementary
This means that:
x + y = 90 ......> equation II
Substitute with equation I in equation II and solve for y as follows:
x + y = 90
44y + y = 90
45y = 90
y = 90/45
y = 2 degrees
Now, substitute with the y in equation I to get x as follows:
x = 44y
x = 44*2
x = 88 degrees
Based on the above calculations, the two angles you are looking for are 2 and 88.
hope this helps :)
sweater = s, blouse = b
s + b = 57, s = 2b
2b + b = 57, 3b = 57, b = 19.
s = 2b = 2(19) = 38.
sweater costs 38 dollars, and blouse costs 19 dollars