find the solution to the system of linear equations x+y=6 dan 2x-y=0
1. find the solution to the system of linear equations x+y=6 dan 2x-y=0
Jawaban:
x+y=6
2x-y=0
_____+
3x =6
x =6/3
x =2
x+y=6
2+y=6
y=6-2
y=4
hp {(x,y)}={(2,4)}
2. Find the solution of the following linear equations system: 2x+3y=20 and7x+2y=53 *
2x+3y= 20.......(1)
7x+2y= 53.......(2)
we multiply (1) by 2 and (2) by 3,
4x+6y= 40.......(1)
21x+6y= 159......(2)
we substract (1) and (2)
4x-21x= 40-159
-17x= -119
x= 7
we substitute x= 7 to (1)
4(7)+6y= 40
28+6y= 40
6y= 40-28
6y= 12
y= 2
so, the solution is:
x= 7
y= 2
3. The ordered array below represents the number of vitamin supplements sold by a health food store in a sample of 16 days.
Jawaban:
ufffewfeffwe ubwemubwe osas
4. Which equation represents the standard enthalpy change of formation of water .....
Jawaban:
equation represents the standard enthalpy change of formation of water
is 2H2(g)+O2(g)→2H2O(l)
5. p(x-q)=xmake x the subjeCT of the equations
Jawab:
x=qx-c
Penjelasan dengan langkah-langkah:
[tex]\frac{x}{x+c}[/tex]=[tex]\frac{p}{q}[/tex]⇒x=[tex]\frac{p(x+c)}{q}[/tex]
qx= p(x+c)
[tex]\frac{qx}{p}[/tex]=x+c⇒qx-c=x
x=qx-c
6. On a map, 1 cm represents 40 km. How long of length on the map represents a distance of 240 km
Jawaban:
1cm = 40 km
240 km = 240/40 x 1 = 6 cm
7. Apply the aims of a diary, and choose which one of these notes best represents the characteristics of a diary.
Terjemahan
Inggris - Indonesia
Inggris :
Apply the aims of a diary, and choose which one of these notes best represents the characteristics of a diary.
Indonesia :
Terapkan tujuan buku harian, dan pilihlah buku harian mana.
8. if - 15 represents 15m below sea level, then + 20 represents...
Jawaban:
20m above sea level.
Penjelasan dengan langkah-langkah:
hope this help
9. On a map, 1 cm represents 60 km. Find the length on the map represents a distance of 480 km!
Answer:
8 cm
Explanation with steps:
scale = map length : actual length
scale = 1 cm : 6.000.000 cm
scale = 1 : 6.000.000
48.000.000 cm / 6.000.000 = 8 cm
hence, 480 km is represented by 8 cm on the map
10. make x the subject of the equationsa(x+1)=b(x+2)
[tex]\begin{align} a(x+1) &= b(x+2) \\ ax+a &= bx+2b \\ ax-bx &= 2b-a \\ x(a-b) &= 2b-a \\ x &= \frac{2b-a}{a-b} \end{align}[/tex]
a(x+1) = b(x+2)ax + a = bx + 2b
ax - bx = 2b - a
x(a - b) = 2b - a
x = 2b-a/a-b
hope this helps^^
11. Solve each of the following equations. a. (3x + 2)(4x - 5)
Jawaban:
12x² - 23x + 10
Penjelasan dengan langkah-langkah:
(3x - 2) (4x - 5)
(3x) (4x) - 5 (3x) - 2 (4x) - (2) (-5)
= 12x² - 15x - 8x + 10
= 12x² - 23x + 10
12. which graph represents the solution of the inequality -12x > 36
Jawaban:
the working and the answer are shown in the pic.
semangat belajar;))
13. If A represents 256 units of stamps and B represents 168 units of stamps. The ratio of B to the total of stamps in the simplest form is
Jawab:
53 : 21
Penjelasan dengan langkah-langkah:
total= 256+168= 424
424 : 168
212 : 84
106 : 42
53 : 21
klo salah bilang di komen nanti saya coba perbaiki
14. The solution to the system of equations 3x-2y=12 and 5x+y=7 is x=p and y =q. The value of 4q+3q is …
Jawaban:
-21
Penjelasan dengan langkah-langkah:
x = p
y = q
solve for x and y
we need to match the x coefficient first, so we can eliminate it and continue.
3x - 2y = 12 (times 5)
5x + y = 7 (times 3)
15x - 10y = 60
15x + 3y = 21
-------------------- (subtract)
-13y = 39
y = 39 ÷ -13
y = -3
then, substitute y with -3 onto one of the equations above.
5x + y = 7
5x - 3 = 7
5x = 7 + 3
5x = 10
x = 2
x = p and y = q
2 = p and -3 = q
the value of 4q + 3q
= 4q + 3q
= 7q
= 7(-3)
= -21
the value of 4q + 3q is -21
15. 3x + 4y = -22y - x = -19 what is the solutions ( x , y ) to the system of equations above?
Jawab:
(x,y)=(3,-8)
Penjelasan dengan langkah-langkah:
Consider the equations
3x + 4y=-23….(1) and 2y - x =-19….(2)
3*(2)=> 6y - 3x = -57
(1) => 4y + 3x =-23
Adding the above equations we get
(6y - 3x) + (4y + 3x)=-57–23
10y = -80
y=-80/10
y= -8
Put the value of y in equation (2) we get
2(-8)-x =-19
-16 - x =-19
-x =-19+16
-x =-3
x= 3
So the solution is (x,y)=(3,-8)
========================================may be usefulglad to help youkeep the spirit[tex]by:asya291006[/tex]
16. p(x-q)=xmake x the subject of the equations
[tex]\begin{align} p(x-q) &= x \\ px-pq &= x \\ px-x &= pq \\ x(p-1) &= pq \\ x &= \frac{pq}{p-1} \end{align}[/tex]
17. The mass of rod is 5kg. the rod is attached at the wall using the hinge, as shown the system below. find the tension of the tie rope and force components of the hinge in the system
Jawaban:
pppppppppppppppppppppppppp
18. find the solution to each of the following system of equations by elimination for example 2x+y=5 and 3x-2y=11
3x-2y=11 |×1
2x+y=5 |×2
⇒3x-2y =11}ini
4x+2y=10}dikurangkan ini
⇒-x=1 ⇔x=-1 dan y = 2x+y=5
2×-1+y =5
-2+y=5
y=7
19. Given matrix What is the determinant of the Y matrix?
Answer:
So we get the form below. Det (Y) = (−4)(−2)(3) + 5(4)(−1) + (2)(0)(−6) − ((−1)(−2)(2) + (−6)(4)(−4) + (3)(0)(5))
(Y) = (−4)(−2)(3) + 5(4)(−1) + (2)(0)(−6) − ((−1)(−2)(2) + (−6)(4)(−4) + (3)(0)(5))=24−20+0−(4+96+0) =−96.
explanation:
hope it's useful ^^
Answer:
-96
explanation:
smart :l
20. 4) Which of the following represents all the possible values of x that satisfy the equation below? X X x − 3 2x 2 *
Nilai x memenuhi persamaan yaitu x = 0 atau x = 4. Soal ini berkaitan dengan materi mencari nilai x dari suatu persamaan.
Penjelasan dengan langkah-langkahDiketahui :
Koreksi soal, mungkin maksud Anda persamaan x/(x-3) = 2x/2
Ditanyakan :
Solusi dari permasalahan tersebut
Jawab :
Langkah 1
x / (x - 3) = 2x / 2
Jika dipindah ruas akan menjadi :
x . 2 = 2x . (x – 3)
Selanjutnya kita lakukan operasi
2x = [tex]2x^{2}[/tex] – 6x
0 = [tex]2x^{2}[/tex] – 8x
0 = 2x (x – 4)
x = 0 atau x = 4
Jadi, x yang memenuhi adalah x = 0 atau x = 4
Pelajari Lebih LanjutMateri tentang mencari nilai x dari suatu persamaan brainly.co.id/tugas/26215307
#BelajarBersamaBrainly #SPJ1
0 komentar:
Posting Komentar