Hello from MrBillDoesMath!
Answer:
x = 3
Discussion:
Remark: if Tito solved the equation why didn't he tell you what the solution was ? ); Guess I'll have to do it myself....
2(3x+5) = 22 + 5x - 3x => 2(3x+5) = 6x + 10 and 5x-3x = 2x
6x + 10 = 22 + 2x => subtract 2x for both sides
6x - 2x + 10 = 22 => subtract 10 from both sides
4x = 22-10 = 12 => divide both sides by 4
x = 12/4 =3
Thank you,
MrB
To prove:

Solution:

Multiply first term by
and second term by
.

Using the identity: 

Denominators are same, you can subtract the fractions.

Using the identity: 

Using the identity: 

------------ (1)

Using the identity: 


------------ (2)
Equation (1) = Equation (2)
LHS = RHS

Hence proved.
Answer:
No is your answer
Step-by-step explanation:
Answer:
simple, just pretend liek you can write on k ami because i dont
know
Step-by-step explanation:
<h2>Answer: </h2>
<u>In a right triangle, Relation of base and hypotenuse is cosine</u>.
cos40° = 10/h
0.76604 = 10 × h
0.76604h = 10
h = 10/0.76604 = 13.05units.