Question

-9=5/17n
a.-153/5
b.5/153
c.17/45
d.45/17

Answer 1

which equation is an identity
a.11-(2v+3)= -2v-8

Answer 2

which equation has no solution
5v+3=5v-5
2x-4=2x+7-x

Answer 3

3(x-7)-x=2x-21

Answer 4

4+2y=9+2y

Answer 5

ella and margaret were at a carnival
$5.00
$5.25
$2.50
$7.25

Answer 6

ella and margaret were at a carnival what was the cost for cotton candy
$5.00
$5.25
$2.50
$7.25

Answer 7

how much does cotton candy cost
$5.00
$5.25
$2.50
$7.25

Answer 8

3(y-5)+2=5

Answer 9

70=-7(-2-2z)

Answer 10

70=-7(-2-2z)
z=4
z=-28
z=-128
z=784

Answer 11

To solve for n, we need to isolate it on one side of the equation.

Starting with -9 = (5/17)n, we can multiply both sides by 17 to get rid of the fraction:

-9 * 17 = (5/17)n * 17
-153 = 5n

Now, divide both sides by 5 to solve for n:

-153/5 = 5n/5
-153/5 = n

Therefore, the answer is a. -153/5.

Answer 12

To determine if an equation is an identity, we need to simplify both sides of the equation and see if they are equal regardless of the values of the variables.

Starting with 11 - (2v + 3) = -2v - 8:

First, simplify the expression inside the parentheses (2v + 3):

11 - 2v - 3 = -2v - 8

Now, combine like terms on both sides of the equation:

8 - 2v = -2v - 8

Next, add 2v to both sides of the equation:

8 = -8

The equation 8 = -8 is not true regardless of the value of v. Therefore, the equation is not an identity.

So, the answer is none of the given options.

Answer 13

To determine if an equation has no solution, we need to solve the equation and see if we end up with a contradiction.

Starting with the first equation, 5v + 3 = 5v - 5:

Subtract 5v from both sides:

3 = -5

The equation 3 = -5 is not true, so the first equation has no solution.

Now, let's check the second equation, 2x - 4 = 2x + 7 - x:

Combine like terms on both sides:

2x - 4 = x + 7

Subtract x from both sides:

x - 4 = 7

Add 4 to both sides:

x = 11

The solution for x is 11, so the second equation does have a solution.

Therefore, the equation that has no solution is 5v + 3 = 5v - 5.

Answer 14

Let's solve the equation step by step:

Starting with 3(x-7) - x = 2x - 21:

First, distribute the 3 to both terms inside the parentheses:

3x - 21 - x = 2x - 21

Combine like terms on both sides of the equation:

2x - 21 = 2x - 21

Now, subtract 2x from both sides:

-21 = -21

The equation -21 = -21 is true regardless of the value of x. Therefore, this equation has infinitely many solutions. Any value of x will satisfy the equation.

So, the answer is that the equation 3(x-7) - x = 2x - 21 has infinitely many solutions.

Answer 15

To solve the equation 4 + 2y = 9 + 2y, we need to isolate the variable y.

First, let's simplify both sides of the equation:

4 + 2y = 9 + 2y

Next, we can subtract 2y from both sides:

4 = 9

However, the equation 4 = 9 is not true. Since there is no value of y that will make this equation true, the equation 4 + 2y = 9 + 2y has no solution.

Therefore, the answer is that the equation 4 + 2y = 9 + 2y has no solution.

Answer 16

The given list of prices seems to be unrelated to the statement about Ella and Margaret being at a carnival. It's unclear how these numbers are related to the scenario. Could you please provide more information or clarify your question?

Answer 17

The list of prices provided does not directly indicate the cost of cotton candy at the carnival. Without further information, we cannot determine the specific cost for cotton candy. It is possible that the cost for cotton candy was not given in the options provided.

Answer 18

Based on the provided options, we can't conclusively determine the exact cost of cotton candy. The cost of cotton candy may not be included in the given options or may require additional information to determine accurately.

Answer 19

Let's solve the equation step by step:

Starting with 3(y - 5) + 2 = 5:

First, distribute the 3 to both terms inside the parentheses:

3y - 15 + 2 = 5

Next, combine like terms on the left side of the equation:

3y - 13 = 5

Now, isolate the variable y by adding 13 to both sides:

3y = 18

Finally, divide both sides by 3:

y = 6

Therefore, the solution to the equation 3(y - 5) + 2 = 5 is y = 6.

Answer 20

Let's solve the equation step by step:

Starting with 70 = -7(-2 - 2z):

First, simplify the expression in the parentheses:

70 = -7(-4 - 2z)

Multiply -7 by each term inside the parentheses:

70 = 28 + 14z

Next, subtract 28 from both sides:

70 - 28 = 28 + 14z - 28

42 = 14z

Finally, divide both sides by 14:

42/14 = 14z/14

3 = z

Therefore, the solution to the equation 70 = -7(-2 - 2z) is z = 3.

Answer 21

Let's substitute each value of z into the equation and check if it satisfies the equation:

For z = 4:
70 = -7(-2 - 2(4))
70 = -7(-2 - 8)
70 = -7(-10)
70 = 70 (True)

For z = -28:
70 = -7(-2 - 2(-28))
70 = -7(-2 + 56)
70 = -7(54)
70 = -378 (False)

For z = -128:
70 = -7(-2 - 2(-128))
70 = -7(-2 + 256)
70 = -7(254)
70 = -1778 (False)

For z = 784:
70 = -7(-2 - 2(784))
70 = -7(-2 + 1568)
70 = -7(1566)
70 = -10962 (False)

From the checks, it is clear that only z = 4 satisfies the equation.

Therefore, the correct answer is z = 4.