1. -2v-7=-23
1.15
2.8
3.-8**
4.-15
2. x/4-5=-8
1. -27
2. -12
3. -7
4. 12**
3. x/5+=10
44
30
20**
-20
4, -2(m-30)=-6m
-15
-13**
-8
8
5. 3.75x+3.7=1.7+1.75x
10
-1
1**
.1
can some one check these for me or even help out on the rest
lesson 9 equations and inequalities unit test btw
someone pleaseeeee
you need to learn how to check your answers. So, let's do that
#1 (-2)(-8) - 7 = 16-7 = 9 So Not -8
-2v - 7 = -23
2v+7 = 23
2v = 16
v = 8
#2. 12/4 - 5 = 3-5 = -2 so not 12
#3. typo
#4. -2(-13-30) = -2(-43) = 86 which is not -6(-13) = 78
#5. 3.75+3.7=7.45 but 1.7+1.75 = 2.45
are you just guessing?
Sure! I'll help you check the answers for the given equations:
1. -2v - 7 = -23
To solve for v, we need to isolate the variable.
Add 7 to both sides:
-2v - 7 + 7 = -23 + 7
-2v = -16
Divide both sides by -2 (or multiply by -1/2):
v = -16 / -2
v = 8
The correct answer is 4. v = 8.
2. x/4 - 5 = -8
To solve for x, we need to isolate the variable.
Add 5 to both sides:
x/4 - 5 + 5 = -8 + 5
x/4 = -3
Multiply both sides by 4:
4 * (x/4) = -3 * 4
x = -3 * 4
x = -12
The correct answer is 2. x = -12.
3. x/5 + 10 = 44
To solve for x, we need to isolate the variable.
Subtract 10 from both sides:
x/5 + 10 - 10 = 44 - 10
x/5 = 34
Multiply both sides by 5:
5 * (x/5) = 34 * 5
x = 34 * 5
x = 170
The correct answer is 3. x = 170.
4. -2(m - 30) = -6m
To solve for m, we need to distribute the -2 to the expression inside the parentheses:
-2m + 60 = -6m
Add 2m to both sides:
-2m + 2m + 60 = -6m + 2m
60 = -4m
Divide both sides by -4:
60 / -4 = -4m / -4
-15 = m
The correct answer is 2. m = -15.
5. 3.75x + 3.7 = 1.7 + 1.75x
To solve for x, we want to combine like terms to isolate the variable.
Subtract 1.75x from both sides:
3.75x - 1.75x + 3.7 = 1.7 - 1.75x + 1.75x
2x + 3.7 = 1.7
Subtract 3.7 from both sides:
2x + 3.7 - 3.7 = 1.7 - 3.7
2x = -2
Divide both sides by 2:
2x / 2 = -2 / 2
x = -1
The correct answer is 3. x = -1.
I hope this helps! Let me know if you have any more questions.