Solve each of the following equations 2(x+3)=8
1. Solve each of the following equations 2(x+3)=8
Semoga terbantu.....:)Kelas 7 Matematika
Bab Persamaan Linear
2 (x + 3) = 8
x + 3 = 8/2
x = 4 - 3
x = 1
2. solve the following equations
Jawab:
Penjelasan dengan langkah-langkah:
3. Which of the following is true ofan object whenever work is doneon the object? *a. The object moves.b. The object accelerates.c. The forces acting upon the object are balanced.d. The forces acting upon the object are unbalanced
The true statement whenever work is done on the object is A,B,and Distruestatement.
PreliminaryHi dude ! Now we will learn about "work (physics)". In the physics, we said work if any force that make anything move (including us) from a place to another place. From the meaning of work, we know that work are depend on two factor. There are :
Force. When you increase the force to move, the number of work is increase too. But, when you decrease the force, the number of work is decrease too.Shifting. When the distance of shifting increase, the number of work is increase too.Problem SolvingLet's go we check again by the option :
(A) : The object movesYes, we know that when the distance of moving is increase, the number of work is increase too. So, even the object starting move, its mean that we have do the work to the object.
(B) : The object acceleratesYes, its a true statement too. We know that we need force to moving any other thing (including ourself). Flashback again, that when we do a force, that mean"there is mass that has been moving with a certain acceleration". So, if we have do the work, we have do the force too. If we do the force, the acceleration is exist.
(C) : The forces acting upon the object are balancedYes, this statement is false. But, there may be confusion between "balanced" and "constant". If we say balance its meaning, "The object has not passing its equilibrium point or the forces acting (between left and right) are the same".
If the object has not passing its equilibrium point, the object not moving. If the object not moving, the number of works is zero.If the force acting is balance, so the resultant number is zero. When resultant ia zero, there is no force and also there is no works.(D) : The forces acting upon the object are unbalancedThisstatementistrue. From the explanation on point C, we can conclude if the imbalance of the force that occurs will cause the object to move or the occurrence of a force that causes a resultant in a certain direction. The existence of a shiftig or force causes the value of the work done by the object.
More Detail About This Question :Grade : Junior High SchoolSubject : PhysicsChapter : Force and Works In Our LiveKeyword : works; works meaning in physics; factor of the works4. Solve the following equations.a. |2x-3|=3
Penjelasan dengan langkah-langkah:
semoga dapat membantu
5. Calculate the value of p and of q that satisfy the following simultaneous equations:2p-3q=134p+q=5
sekiranya begitu, maaf kalau salah
smg bisa membantu ya walau berantakan :)
6. solve the following equations 4x^2=25
4x² = 25
x² = 25/4
x² - 25/4 = 0
(x + 5/2)(x - 5/2) = 0
x + 5/2 = 0
x = -5/2
x - 5/2 = 0
x = 5/2
x = -5/2 and x = 5/2
7. Solve each of the following pairs of simultaneous equations. a) 2x+y= 5 x + y² = 5
Since the question is in English, i'll answer in English too.
2x+y=5 ....(1)
x+y²=5 .....(2)
modified the 2 equation
x+y²=5
x=5-y² .... (3)
subtitute (3) to (1)
2(5-y²)+y=5
10-2y²+y=5
-2y²+y+5=0
2y²-y-5=0
using Quadratic Formula, we get the roots of the quadratic equation are :
-(-1)±√((-1)²-4.2.(-5))/2(2) =
1±√1+40/4 =
1±√41/4 = 1+√41/4 or 1-√41/4
thus, enter each of y value to (1) to get the value of x.
2x+1+√41/4=5
2x=5- (1+√41)/4
2x=19+√41/4
x=19+√41/8
same to the other roots, we get
2x+1-√41/4=5
2x=5-(1-√41)/4
x=19-√41/8
Hence, the solutions are
((19+√41)/8 ; (1+√41)/4) and ((19-√41/8);(1-√41)/4)
Happy to help <3
8. balance the following equations : N2O5 -> N2O4 + O2
N2O5 -> N2O4 + O2
= N2O5 -> N2O4 + 1/2 O2
= 2 N2O5 -> 2 N2O4 + O2
9. 3. Consider the relation determined by each of the following equations. That is, I e Z is related to y € Z if and only the equation is true for that r and y. a) x+y=1 b) r2 + y2 = 1 c) 2 + y = 1 Which of the relations are functions?
Oke semoga membantu ya
10. 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
11. the rate of the dependency ratio in a developing country is high enough. this condition is caused by.... a. the low education level of the citizens b. the high mortality rate c. the increasing morbidity d. the rapid population growth which is not balanced with available employment
jawabannya yg tepat adalah D
12. solve the following equations |5x+3|=|11-2x|
Jawab:
5x + 3 = 11 - 2x
5x + 2x = 11 - 3
7x = 8
x = 8 / 7
x = [tex]1\frac{1}{7}[/tex]
13. 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
14. factorise and solve each of the following equations. 10x² - 5x - 5 = 0
Penjelasan dengan langkah-langkah:
penyelesaiannya
x =-1/2 atau x = 1
Jawab:
x = -1/2 atau x = 1
Penjelasan dengan langkah-langkah:
10x² - 5x - 5 = 0 (bagi kedua ruas dengan 5)
2x² - x - 1 = 0
(2x + 1)(x - 1) = 0
maka 2x + 1 = 0 atau x - 1 = 0
Jika 2x + 1 = 0, maka 2x = -1, x = -1/2
Jika x - 1 = 0 maka x = 1
Jadi, x = -1/2 atau x = 1
15. 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
16. Solve the following linear different equations
Jawaban:
Penjelasan dengan langkah-langkah:
check it bro!!!!!!
17. ... which lived in a warm stable and got plentof fresh ... (Paragraph 1)The synonym of the word "stable” is....A. FieldB. HouseC. PenD. Balanced
Stable has the same meaning with pen. So the answer is C. Hope it helps you✌
18. solve the following equations |2x-3|=3
Jawab:
|2x-3| = 3
2x-3 = 3
2x = 3 + 3
2x = 6
x = 6/2
x = 3
atau
-|2x-3| = 3
-(2x-3) = 3
-2x + 3 = 3
-2x = 3 - 3
-2x = 0
x = 0/-2
x = 0
maaf kalau salah :")
19. 1. Solve the following equations |3x + 11 = 10.
Jawab:
3x + 11 = 10
3x = 10 + (-11)
3x = - 1
x = - 3
20. using the graphical method, solve each of the following pairs of simultaneous equations: a. 3x-y = 0 2x-y =1
3x-y=0
2x-y=1
Elimination. Subtitution
(3x-y = 0 - 2x-y = 0) 2x-y = 1
= x = -1 = 2(-1)-y = 1
= y = 1 - (- 2)
y = 3
so, x = -1, y = 3
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