cathydaves
15.01.2020 •
Mathematics
5×=15+10y,3×+7y=31 it's for tomorrow pls
Solved
Show answers
More tips
- H Health and Medicine Headache: A Comprehensive Guide to Treatment...
- G Goods and services Stock center - a modern way of optimizing logistics...
- F Food and Cooking How to Properly Wash a Down Jacket? Tips from Experts...
- C Computers and Internet Thin Client: What It Is and Why You Need It?...
- F Food and Cooking The Most Delicious and Simple Fish in Batter Recipe...
- 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...
Answers on questions: Mathematics
- M Mathematics Anja divides (8x3 – 36x2 + 54x – 27) by (2x – 3) as shown below. What error does Anja make...
- M Mathematics What is the value of n when 8n - 7 = 6n +5?...
- M Mathematics With which of the following statements would the Buddha likely disagree...
- E English What is meant by the phrase when he entered brasenose college at oxford in 1930, he studied science in deference to his father ?...
- S Spanish 2. hay varias de pintores de muchos países diferentes....
- M Mathematics Li wants buy a jacket is originally price at $65.00. today the store is advertising the jacket for 40°/° off the original price....
- M Mathematics Which of these correlations represents causation? As the sales of a product increase, its price increases. The weight of a person increases with an increase in the person...
- B Biology What happens to the activation energy when an enzyme is present?...
Ответ:
x = 6.39, y = 1.69 is the solution of the given equation system.
Step-by-step explanation:
Here, the given set of equation is:
5 x = 15 + 10 y ⇒ 5 x - 10 y = 15 (1)
3 x +7 y = 31 (2)
Now, the coefficient of x in first equation id 5 and in second is 3.
So, MULTIPLY (1) with 3 and (2) with -5 , we get:
15 x - 30 y = 45
-15 x- 35 y = -155
ADD BOTH EQUATIONS , we get:
15 x - 30 y -15 x- 35 y = 45 - 155
or, -65 y = -110
or, y = 110/65 = 1.69
Put y = 1.69 in 3 x +7 y = 31 , we get:
3(x) + 7 (1.69) =31
⇒ 3 x = 19.17 or x = 6.39
Hence, x = 6.39, y = 1.69 is the solution of the given equation system
Ответ:
Slope = y2 − y1/x2 − x1
−6 − 6/−7−−2
−12/−5
12/5