All categories

3 years ago

How many solutions does the equation −2a + 2a + 7 = 8 have? One Two None Infinitely many

Mathematics

2 answers:

aleksandrvk [35]3 years ago

5 0

Answer:

no solutions

Step-by-step explanation:

−2a + 2a + 7 = 8

Combine like terms

7 = 8

This is never true so there are no solutions

lakkis [162]3 years ago

3 0

Infinitely many, as -2a + 2a cancel each other out, so it doesn’t matter what a is currently equal to.

You might be interested in

Determine if the solution set for the system of equations shown is the empty set, contains one point or is infinite. 5x+7=2y and

Luda [366]

Answer:

The correct option is option B. It has one solution, and it's x=-3

Step-by-step explanation:

We have the following system of equations:

5x+7 = 2y (1)

y-9x=23 (2)

Step 1: Solve for 'y' in equation (2):

y-9x = 23

y = 9x + 23

Step 2: Substitute in equation (1):

5x + 7 = 2y

5x + 7 = 2(9x + 23)

5x + 7 = 18x + 46

Step 3: Solve for x:

7 - 46 = 18x - 5x

-39 = 13x

x= -3

So the correct option is option B. It has one solution, and it's x=-3

7 0

3 years ago

Read 2 more answers

Solve: 3/K+3 = 8/k-2

fomenos

Answer:

k = 1

Step-by-step explanation:

I will upload a picture with all of my work.

7 0

3 years ago

So i dont know what 9+4+x is can you help?

Dahasolnce [82]

Answer:

13+x

Step-by-step explanation:

all you have to do is 9+4 which is 13 and leave the +x so you get 13+x as your answer

3 0

3 years ago

Read 2 more answers

Which numbers are solutions of the inequality? Choose all that apply.

Nady [450]

Can you post the answer choices please ??

4 0

3 years ago

Read 2 more answers

3, 9, 10, 5, 8, 5, 9, 11, 10, 3, 10 Find the mean of the data.

slava [35]

Answer:

7.55

Step-by-step explanation:

An arithmetic mean is the average value of all the data points.

In order to find the average value, you add all the data points then divide the resulting sum by the number of data points there are.

The sum of all data points:

3 + 9 + 10 + 5 + 8 + 5 + 9 + 11 + 10 + 3 + 10 =

The number of data points:

3, 9, 10, 5, 8, 5, 9, 11, 10, 3, 10

1,2,3,4,5,6,7,8,9,10, 11 = 11 data points

Average value/ Mean:

83 / 11 = 7.545454545454 = rounded to 7.55

7 0

3 years ago