First we find the common difference by subtracting the first term by the second term. 75 - 69 = 6. So the common difference is 6.
now we need to find the 28th term...we need to do this because we need to use this number in the sum formula.
an = a1 + (n-1)*d
n = term to find = 28
a1 = first term = 69
d = common difference = 6
now we sub
a28 = 69 + (28 - 1) * 6
a28 = 69 + 27 * 6
a28 = 69 + 162
a28 = 231...this is the 28th term
now we use the sum formula
sn = (n(a1 + a28) / 2
s28 = (28(69 + 231) / 2
s28 = (28(300) / 2
s28 = 8400/2
s28 = 4200 <===the sum of the first 28 terms
Answer:
The overall average is $148,000
Step-by-step explanation:
120,000 740,00 divided by 5 is 148,000
120,000
120,000
190,000
+ 190,000
-------------
740,000
Answer:
The continents moved by 1.905 centimeters each year.
Step-by-step explanation:
This question is solved by proportions, using a rule of three.
In the past 100 years, scientists measured the movement of the continents to be 190.5 centimeters. How much it moved in a year?
100 years - 190.5 centimeters.
1 year - x centimeters
The continents moved by 1.905 centimeters each year.
Answer:
A line which is parallel to the y-axis has form of x = a
This line passes (77, 88), then a = 77
=> The equation of this line: x = 77
Hope this helps!
:)
Answer:
A) 0.05
Step-by-step explanation:
You must divide 3.45 by 64 to get the cost per ounce (how much 1 ounce costs)
3.45 ÷ 64 = 0.0539 = 0.05