rachel693
31.08.2019 •
Mathematics
Find the sum of the arithmetic series in which a1 = –68, d = –3, and n = 20.
Solved
Show answers
More tips
- W Work and Career Мерчендайзинг – все, что нужно знать...
- S Science and Technology The Metric System in Our Daily Life: Understanding Its Importance...
- H Health and Medicine Angina: Causes, Symptoms, and Treatment...
- C Computers and Internet How to Learn to Type Fast?...
- F Food and Cooking Delight for Gourmets: How to Prepare Liver Pate...
- S Style and Beauty How to braid friendship bracelets?...
- H Health and Medicine Mercury Thermometer Danger: What to do when a thermometer breaks?...
- F Food and Cooking Which Calamari Salad is the Most Delicious?...
- S Society and Politics 10 Tips for Boosting Your Self-Esteem...
- F Food and Cooking The Most Delicious and Simple Fish in Batter Recipe...
Answers on questions: Mathematics
- M Mathematics A student solves the equation for v. Start with the original equation. Use the square root property. Use the division property of equality. Use the multiplication property...
- M Mathematics A computer screen has a length of 16 inches and a width of 12 inch what is the area of the computer screen...
- M Mathematics A women s long-jump record is about 1 1/6 the distance of the 15-16-year-old girls record of 20 13/24 feet. Find the distance of the women s record to the nearest foot....
- M Mathematics The issue of corporate tax reform has been cause for much debate in the United States. Among those in the legislature, 27% are Republicans, 56% are Democrats and 17% are Independents....
- M Mathematics A simple random sample of 10 paired values (x,y) yields the following statistical calculations: ∑x=108, ∑y=138, ∑(x2) =1249, ∑(y2) =2280, ∑(xy) =1676. What is the linear correlation...
- M Mathematics The difference of two numbers is 1 and the sum of their squares is 13. Find the numbers....
- M Mathematics He has 6 pieces of granite,3 pieces of marble,14 pieces of sandstone,and 1 piece of slate. What is the ratio of pieces of sandstone to pieces of marble in deans collection?...
- M Mathematics The new owner of a beauty shop is trying to decide whether to hire one, two, or three beauticians. She estimates that profits next year (in thousands of dollars) will vary...
- M Mathematics The manager of an automobile dealership is considering a new bonus plan in order to increase sales. Currently, the mean sales rate per salesperson is five automobiles per...
- M Mathematics Mr. Singh needed to understand the trend of his students’ latest test scores. Find the mean and median for each set of data, and then determine which gives a better picture...
Ответ:
Sum = -1930
Step-by-step explanation:
Sum of an arithmetic series;
;Sum = n/2[ 2a1 + ( n - 1 )d]
Then substitute into the equation above
; Sum = 20/2 [ 2(-68) + (19)-3 ]
; Sum = 10 [ -136 - 57 ]
Therefore the sum of the arithmetic series
is; -1930
Ответ:
a
Step-by-step explanation:
multiply both members in the pharanthesis by 6: 6*3+6*g= 18+6g