![Mranthony4565](/avatars/22539.jpg)
Mranthony4565
19.07.2019 •
Mathematics
One question ! show work! 49 points! marco is thinking of two numbers. adding 5 times the first number and 8 times the second number gives a total of -13. also, adding 5 times the first number and 10 times the second number gives -15. what are the two numbers?
Solved
Show answers
More tips
- P Philosophy Unbelievable stories of encounters with otherworldly forces...
- L Leisure and Entertainment How to Choose the Perfect Gift for Men on February 23rd?...
- H Health and Medicine How to Treat Whooping Cough in Children?...
- H Health and Medicine Simple Ways to Lower Cholesterol in the Blood: Tips and Tricks...
- O Other How to Choose the Best Answer to Your Question on The Grand Question ?...
- L Leisure and Entertainment History of International Women s Day: When Did the Celebration of March 8th Begin?...
- S Style and Beauty Intimate Haircut: The Reasons, Popularity, and Risks...
- A Art and Culture When Will Eurovision 2011 Take Place?...
- S Style and Beauty How to Choose the Perfect Hair Straightener?...
- F Family and Home Why Having Pets at Home is Good for Your Health...
Answers on questions: Mathematics
- M Mathematics The region between the graphs of X = y2 and X = 5y is rotated around the line y=5. The volume of the resulting solid is....
- M Mathematics Please help with this question....
- M Mathematics smith put some money in a saving certificate which earns 8% a year. the yearly interest in $600. how much did smith invest?...
- M Mathematics Sam showed how he added 4+2,tell how sam could find the correct sum...
- M Mathematics Last year, the volleyball team paid $5 pair for socks and $17 per pair for shorts on a total purchase of $315. this year they spent $342 to buy the same number of...
- E English What is the author s attitude toward a subject called? structure tone organization description mark this and retum...
Ответ:
Equation 1: 5X + 8Y = -13
Equation 2: 5X + 10Y = -15
Multiply equation 1 by -1 to get: -5X + -8Y = 13
Now add the 2 equations together:
-5X + 5X = 0
-8Y + 10Y = 2Y
13 + -15 = -2
The total of the 2 equations is 2Y = -2
divide both sides by 2 to solve for Y
Y = -2 / 2
Y = -1
Now we know the 2nd number is -1, so replace Y in the 1st equation and solve for X
5X +8(-1) = -13
5x + -8 = -13
Add 8 to both sides:
5x = -5
Divide both sides by 5 to get x
X = -5 / 5
X = -1
Both numbers are -1
To check replace X and Y with -1 and solve:
1st equation: 5(-1) +8(-1) = -5 + -8 = -13 TRUE
2nd equation: 5(-1) +10(-1) = -5 + -10 = -15 TRUE
Both numbers are -1
Ответ:
60
Step-by-step explanation: