![noname5359](/avatars/26303.jpg)
noname5359
29.04.2021 •
Mathematics
Help me pls need it really appreciated
Solved
Show answers
More tips
- H Health and Medicine How to Treat the Flu: A Comprehensive Guide...
- O Other What is a Disk Emulsifier and How Does it Work?...
- H Health and Medicine How to Calm Your Nerves? Expert Tips That Actually Work...
- A Animals and plants 5 Tips for Taking Care of Yews to Keep Them Green and Beautiful...
- S Sport How to wrap boxing hand wraps? Everything you need to know!...
- F Food and Cooking 10 Reasons Why You Should Avoid Giving Re-Gifts: An Informative Guide...
- F Family and Home Tender Care for Your Parquet: Is it Possible to Clean Parquet?...
- S Style and Beauty How Are Eyelash Extensions Applied? All Your Questions Answered...
- F Food and Cooking 10 Tips for Proper Sushi Consumption...
- S Style and Beauty Learn how to tie a keffiyeh on your head like a pro...
Answers on questions: Mathematics
- M Mathematics Select all the values that belong to the solution set of 9 ≤ 6 - y. 0 3 -3 -1 -6 6 -4...
- M Mathematics Factor the polynomial. x2 - 5xy + 6y2 a) (x - 3)(x - 2) b) (x - 6y)(x + y) c) (x - 3y)(x - 2y) d) (x + 3y)(x + 3y)...
- M Mathematics Evaluate the square root. √256 =...
- M Mathematics Ireally really need this mee super ez 28 points i really need this i dont really care if its wrong at least you try ; ) 43. a frequency table is shown for the height’s of 4th graders...
- M Mathematics Bethany has a piece of yarn that is 27 feet, 6 inches long. she gets another piece of yarn that is 14 feet, 9 inches long. complete the equation to find out how much yarn bethany...
- M Mathematics Find the degree of the monomial. 6x8y5...
- M Mathematics Arailroad track and a road cross at right angles. an observer stands on the road 70 meters south of the crossing and watches an eastbound train traveling at 60 meters per second....
- M Mathematics Using the ratio of perfect squares method, what is square root of 89 rounded to the nearest hundredth? use the ratio of perfect squares method....
- M Mathematics 4²*4^4? can someone pls solve it?...
- M Mathematics Jo said that when you multiply a nonzero whole number by a fraction less than 1, the product is always less than the whole number. do you agree?...
Ответ:
No, because he has a sum of 0.
Step-by-step explanation:
3+11-5-8-2+1
=14-5-8-2+1
=9-8-2+1
=1-2+1
=-1+1
=0
Ответ:
The correct answer is:
15 bicycles and 6 skateboards.
Explanation:
Let x represent the number of bicycles and y represent the number of skateboards. The first equation in our system is then
x+y = 21, since there are 21 total items in the shop.
Each bicycle has 2 tires and each skateboard has 4; this gives us the equation
2x+4y=54 (because they are ordering 54 tires).
This makes our system
We will use elimination to solve this; we first need one of the variables to have the same coefficient in both equations. We will make x the same, and we will do this by multiplying the first equation by 2:
Now we will subtract the second equation from the first one:
Divide both sides by -2:
-2y/-2 = -12/-2
y = 6
There were 6 skateboards. Substituting this into the first equation,
x+6 = 21
Subtract 6 from each side:
x+6-6 = 21-6
x = 15
There were 15 bicycles.