3+1/x *x = 7/x*x
3x+1 = 7
3x+1-1=7-1
3x=6
3x/3 =6/3
x =2
Answer:
x=38
Step-by-step explanation:
First, know that the sum of the angles in a triangle is 180.
Then, add the angles. 2x+38+x+x-10.
Make them equal to 180.
2x+38+x+x-10=180
Simplify.
4x+28=180
Subtract 28 from 180.
4x=152
Divide 4 from 152 to make x alone.
x=38
There you go!
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Answer:
Step-by-step explanation:
<u>Given</u>
- 0,324km+32mm+125cm+2,22dm+43dm= ? m
<u>Solution</u>
- 0.324 km = 0.324*1000m = 324 m
- 32 mm = 32/1000 m = 0.032 m
- 125 cm = 12/100 m = 1.25 m
- 2.22 dm + 43 dm = 45.22 dm = 45.22/10 m = 4.522 m
<u>Sum</u>
- 324 m + 0.032 m + 1.25 m + 4.522 m = 329.804 m
<u><em>Note. there is no dam unit, considered as dm</em></u>
Answer:
x ∈ (-∞, -2) ∪ (2, ∞)
Step-by-step explanation:
To solve this problem we must factor the expression that is shown in the denominator of the inequality.
So, we have:
So the roots are:
Therefore we can write the expression in the following way:
Now the expression is as follows:
Now we use the study of signs to solve this inequality.
We have 3 roots for the polynomials that compose the expression:
.
Observe the attached image.
We know that the first two roots are not allowed because they make zero the denominator, we also know that (x + 5) ^ 2 is always positive because it is squared, so it is not necessary to include the numerator in the study of signs.
Note that:
when
when
Finally after the study of signs we can reach the conclusion that:
x ∈ (-∞, -2) ∪ (2, ∞)