![chocolate12377](/avatars/9939.jpg)
chocolate12377
21.09.2019 •
Mathematics
Can someone me with this question?
Solved
Show answers
More tips
- S Society and Politics Why Did Medvedev Announce a New Privatization of State Property?...
- F Family and Home Stay Warm but Don t Overheat: What is the Optimal Temperature for Your Home During Winter?...
- H Health and Medicine How to Treat the Flu: A Comprehensive Guide...
- O Other What is a Disk Emulsifier and How Does it Work?...
- F Family and Home What does a newborn need?...
- F Family and Home Choosing the Right Car Seat for Your Child: Tips and Recommendations...
- F Food and Cooking How to Get Reconfirmation of Registration?...
- C Computers and Internet How to Get Rid of Spam in ICQ?...
- A Art and Culture Who Said The Less We Love a Woman, the More She Likes Us ?...
- F Family and Home How to Get Rid of Your Neighbors?...
Answers on questions: Mathematics
- M Mathematics 10 books total He has narrowed down his choices to 4 4 novels, 4 4 plays, 5 5 poetry books, and 5 5 nonfiction books. Step 2 of 2 : If he wants to include all 4 4 plays, how many...
- M Mathematics A farmer had twice as many cows as sheep. After he had sold 375 cows and another 12 cows died, he had half as many cows as sheep left. How many cows remained?...
- M Mathematics -y^2+x^3-4x^3-6y^2+5-2-x^3...
- M Mathematics When you convert a improper fraction into a mixed fraction, how do you find out the remainder of it? ex. 23/4 = 23 ÷ 4 = 5 3 is the remainder...
- M Mathematics An electronics vendor sells notebook computers. The company stocks 100 computers at the beginning of each month. Eighty computers are sold when priced at $1,000. However, when...
- M Mathematics TEMA: Metodo de sustitucion El triple de la suma de dos numeros es 25 y el doble de uno de ellos es 14 Lenguaje algebraico....
- M Mathematics Please help thank you so much!...
- M Mathematics How do we display and summarize data distributions?...
- M Mathematics The measures of two angles are 2 (2x + 5) and (62 – 22). What is the value of z if these angles are congruent?...
- M Mathematics Given the function defined in the table below, find the average rate of change, in simplest form, of the function over the interval...
Ответ:
Semicircle area is 1/2xπr²
A=1/2x3.14x4^2
A=25.12 inches^2
Area of rectangle is w*l
A=8x4=32inches^2
area of triangle is 1/2b*h=1/2*4*2
A=4inches^2
Total area=4+32+25.12=61.12 inches^2
Ответ:
x = 1
y = -5
Step-by-step explanation:
This is a simultaneous equation question.
We are given two equations and we shall label the equations as equation 1 and 2.
2x + 5y = -23 (i)
5x + 13y = -60(ii)
Step one
First step to solving simultaneous equations by elimination method is to ensure one of the terms that has an unknown, (in this case, either x or y) is the equal in the two equations.
To do this, we multiply equation one by 5 and equation two by 2
5 x (i) = 10x + 25y = -115 (iii)
2 x (ii) = 10x + 26y = -120(iv)
To eliminate the term that has x, we subtract equation (iii) from equation (iv)
(iv) - (iii) =
(10x - 10x) + (26y - 25y) = -120 - (-115)
y = -5
We substitute the new value of y = -5 into equation (i)
2x + 5y = -23
2x + 5(-5) = -23
2x - 25 = -23
We collect like terms by adding 25 to both sides of the equation
2x - 25 + 25 = -23 + 25
2x = 2
We divide both sides of the equation by the coefficient of x to find the value of x. The coefficient of x is 2
2x/2 = 2/2
x = 1
Therefore, the solutions to the simultaneous equations using elimination method are
x = 1 and y = -5