All categories

3 years ago

How many solutions does x + 2x + 7 = 3x - 7

Mathematics

1 answer:

Alex17521 [72]3 years ago

3 0

Answer:

No solutions! :)

Step-by-step explanation:

To find the number of solutions in a problem we must solve it.

x+2x+7=3x-7

Firstly, combine common terms:

3x+7=3x-7

We can subtract 3x from both sides:

7=-7

The solution is 7=-7, which is no solution.

When a number is equal to a number in a solution, it has no solutions!

:))

You might be interested in

Which of these choices is the best estimate for the answer of 3 1/4 + (-2 2/3)?

Evgesh-ka [11]

3 1/4 = 3.25
-2 2/3 = -2.6667
3.25 + (- 2.6667)
= 3.25 - 2.6667
= ~0.58
therefore best estimate is 0

6 0

3 years ago

Read 2 more answers

Word problem plz help thanks fam 7.04

givi [52]

g/2 + 4

last option is the answer

4 0

3 years ago

Read 2 more answers

Someone please help :(

OleMash [197]

The answer would be answer choice a.

Because 5/4 = 1.25
tan (51) = 1.235
tan (45) = 1
tan (60) = 1.732
tan (57) = 1.5399

The closest to 1.25 is tan (51)

Hope this helps :)

3 0

3 years ago

Use factoring to solve the quadratic equation x2 − 2x − 3 = 12.

melomori [17]

Answer:

$x_1=5\\x_2=-3$

Step-by-step explanation:

You have the following quadratic equation given in the problem:

$x^{2}-2x-3=12$

You must make the equation equal to zero, as following:

$x^{2}-2x-3-12=0$

Add like terms:

$x^{2}-2x-15=0$

Now, to factor the equation, you must find two numbers whose sum is -2 and whose product is -15. Therefore, you have:

$(x-5)(x+3)=0\\x_1=5\\x_2=-3$

7 0

3 years ago

Read 2 more answers

The area of a circular swimming pool is approximately 18 m2. Which is the best estimate of the radius (r)?

DENIUS [597]

Answer:

the radius=9m2

i solve the question and answer is 9

8 0

3 years ago