Help, 3+7x=12, what is x?

Answers

Answer 1

Answer: So just your normal equation.
We need to isolate x alone.
First lets write out our equation
3 +7x = 12

Lets do this step by step.

first subtract 3 from both sides.
3 + 7x = 12
-3 = -3 it cancels out on the left side and we solve on the right side.
*************
7x = 9

second we divide both sides by 7
7x = 9
÷7 = 7 we got the x alone and we just write 9/7 as our answer.

x = 9/7

Or as a decimal.
9/7 could be 1.28571428571429

Either will work.
x = 9/7
or
x = 1.28571428571429

Have a nice day. :)

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How many days are in 3 2/7 weeks

Answers

Well, there are 7 days in a week, so we'll have to multiply that by 3, which would be 21, plus the other 2 days stated in da problem, so that would be a total of 23 days!
I hope I helped, and PLEASE choose my answer as the Brainliest!
Thank you! =D

7 × 3 = 21
21 + 2 = 23

So therefore, 23 days.

PLEASE HELP!!!! 1. The stem-and-leaf plot shows weights of dogs, in pounds, in a dog competition.

How many of the dogs weigh at least 50 lb?

Answers

1 Dog weighs 50lbs because in the stem and leaf plot it says there is a 50lbs dog and a 55lbs dog.

The product of 5 and a number is 10

Answers

The equation for this would be:
$5x$ =10.
X is equal to 2.

The answer it 2
two 5's equal 10 (5+5)

For each of the following numbers, write 4 decimals that would round to this whole number when rounde to the nearest whole number.a)14 b)28 c)32 d)50 e)67 f)71 g)88 h)95

Answers

Round to the nearest whole number:

a) 14 ⇒ 13.5 ; 13.9 ; 14.1 ; 14.4
b) 28 ⇒ 27.5 ; 27.9 ; 28.1 ; 28.4
c) 32 ⇒ 31.5 ; 31.9 ; 32.1 ; 32.4
d) 50 ⇒ 49.5 ; 49.9 ; 50.1 ; 50.4
e) 67 ⇒ 66.5 ; 66.9 ; 67.1 ; 67.4
f) 71 ⇒ 70.5; 70.9 ; 71.1 ; 71.4
g) 88 ⇒ 87.5; 87.9 ; 88.1 ; 88.4
h) 95 ⇒ 94.5; 94.9 ; 95.1 ; 95.4

If the following number is within the range of 1 to 4 then round down.
If the following number is within the range of 5 to 9 then round up.

3x^2+13x+10=0 please help

Answers

I will use the quadratic equation to solve this:
x= -b +(or minus, both) √b² + 4ac
--------------------------------------------
2a
So, your numbers would be: a = 3
b = 13
c = 10
Then, solve: x = -13 +(or minus, both) √169 + 120
--------------------------------------------------
6
= -13 +(or minus, both) 17
------------------------------------
6
So, first do the plus: -13 + 17
--------------
6
= 2/3
Then do the minus: -13-17
------------
6
= 5

Your answer is: 2/3 and 5
( These problems always have two answers)

The answer and explanation is in the attachment.

Find the number: 2 x 10⁴ + 3 x 10² + 5 x 10⁰.

Answers

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