Turtlelover05
04.12.2020 •
Mathematics
Tanya read 12 books for extra credit. She received 3.5 points for each nonfiction book and 1.5 points for each fiction book. If she received 28 extra credit points, how many of each kind of book did Tonya read?
Solved
Show answers
More tips
- C Cities and Countries How to Easily and Quickly Obtain a Schengen Visa?...
- F Food and Cooking Red Caviar: How to Choose the Best?...
- C Computers and Internet Clearing Cache: How to Speed Up Your Browser...
- S Style and Beauty How are artificial nails removed?...
- S Style and Beauty Secrets of Tying a Pareo: 5 Ways...
- F Food and Cooking Everything You Need to Know About Pasta...
- C Computers and Internet How to Choose a Monitor?...
- H Horoscopes, Magic, Divination Where Did Tarot Cards Come From?...
Answers on questions: Mathematics
- M Mathematics A doctor sees between 7 and 12 patients each day. On Mondays and Tuesdays, the appointment times are 15 minutes. On Wednesdays and Thursdays, they are 30 minutes. On Fridays, they...
- M Mathematics Dilation of 2 L(-2, -1), U(0, 2), V(2, -1) L : U : V :...
- M Mathematics Last year, a popular song was downloaded 8.71 x 10^7 times. What is the number in standard form?...
- M Mathematics The farm s owner wants to increase the income from the sale of strawberries to at least $70,000 per year. What change would you suggest that would allow the farm s owner to meet this...
- M Mathematics Brittany read 100 pages in 97 minutes. How many pages can she read in 1 minute...
- M Mathematics Which equation matches the image? a m+m+7=m+15 b 2m+7=m+15 c m+7=15m d 7m=15m...
- M Mathematics What is 6+16 factored with gcf....
- M Mathematics Is the given number a solution to the equation?-9x - 8 = -37.16 if x = 3.24...
- M Mathematics Your family wants to see a movie and there are four theaters near you. The first theater charges $10 for adults, $8 for teenagers, and $5 for children. The second theater charges $8...
- M Mathematics Find -8(4). a -32 b 32 c -12 d 1...
Ответ:
Tanya read 5 nonfiction books and 7 fiction books.
Step-by-step explanation:
Given that:
Number of books read by Tanya = 12
Points for nonfiction book = 3.5
Points for fiction book = 1.5
Total credit points received = 28
Let,
x be the number of nonfiction book read
y be the number fiction books read
According to given statement;
x+y=12 Eqn 1
3.5x+1.5y=28 Eqn 2
Multiplying Eqn 1 by 1.5
1.5(x+y=12)
1.5x+1.5y=18 Eqn 3
Subtracting Eqn 3 from Eqn 2
(3.5x+1.5y)-(1.5x+1.5y)=28-18
3.5x+1.5y-1.5x-1.5y=10
2x=10
Dividing both sides by 2
Putting x=5 in Eqn 1
5+y=12
y=12-5
y=7
Hence,
Tanya read 5 nonfiction books and 7 fiction books.
Ответ:
4
-12
8
Step-by-step explanation:
1 -1
-3 - 3* 3 =
2 -2
multiplication by a scalar just multiplies each item in the matrix
1 -3
-3 - 9 =
2 -6
1 --3
-3-9 =
2--6
1+3
-3-9
2+6
4
-12
8