![$S_{20}=\frac{20}{2} [2a_{1}+(20-1)\cdot 4]$](/tpl/images/0687/9334/ca2f3.png)
![$880=10[2a_{1}+(19)\cdot 4]$](/tpl/images/0687/9334/f3aee.png)
![$880=10[2a_{1}+76]$](/tpl/images/0687/9334/2b057.png)
Question in attachment
...
Answers: 3
Another question on Mathematics
Mathematics, 21.06.2019 17:00
Use the frequency distribution, which shows the number of american voters (in millions) according to age, to find the probability that a voter chosen at random is in the 18 to 20 years old age range. ages frequency 18 to 20 5.9 21 to 24 7.7 25 to 34 20.4 35 to 44 25.1 45 to 64 54.4 65 and over 27.7 the probability that a voter chosen at random is in the 18 to 20 years old age range is nothing. (round to three decimal places as needed.)
Answers: 1
Mathematics, 22.06.2019 00:00
Plz hurry finals a paper cup in the shape of an inverted cone is 8 inches tall and has a radius of 1.5 inches. how much water can the cup hold? use 3.14 for pi. round the answer to the nearest tenth. a) 12.6 cubic in. b) 18.8 cubic in. c) 37.7 cubic in. d) 56.5 cubic in.
Answers: 2
Mathematics, 22.06.2019 02:10
Which pair of expressions is equivalent? a 7(1–k)and7–k b 7(1–k)and1–7k c 7(1–k)and7–k d 7(1–k)and7–7k
Answers: 1
You know the right answer?
Questions
Mathematics, 22.02.2021 02:10
Mathematics, 22.02.2021 02:10
Chemistry, 22.02.2021 02:10
Mathematics, 22.02.2021 02:10
Mathematics, 22.02.2021 02:10
Health, 22.02.2021 02:10
Mathematics, 22.02.2021 02:10
Mathematics, 22.02.2021 02:10
Computers and Technology, 22.02.2021 02:10
Mathematics, 22.02.2021 02:10
Mathematics, 22.02.2021 02:10
Mathematics, 22.02.2021 02:10
