Answer:
Below in bold.
Step-by-step explanation:
First term a1 = 13
11th term a11 = a1 + 10d = 83
So a1 + 10d - a1 = 83 - 13
10d = 70
d = 10
The common difference d = 7.
Sum of n terms = (n/2)[2a1 + (n - 1)d]
Sum of the first 20 terms:
S20 = (20/2)[2*13 + (20-1)7]
S20 = 10 *(26 + 19*7)
S20 = 10*159 = 1590.
Stove area = 12 square feet
Refrigerator area = 20 square feet
Entire kitchen floor = 270 square feet
12 + 20 = 32 square feet
270 square feet - 32 square feet = 238 square feet
238 square feet will be needed
Step-by-step explanation:
There are at least 3 houses on a street if at least two of them have addresses that are consecutive integers.
Answer:
4
Step-by-step explanation:
2/3 ÷ 1/6 =
2/3 x 6/1 =
12/3 = 4
Also you can do:
2/3 = 4/6
there are 4- 1/6 in 4/6
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-Chetan K