Answer:
w=7
Step-by-step explanation:
3w+4w=49
7w=49
w=49/7
w=7
Answer:
1/3
Step-by-step explanation:
2nd one
Answer:

Step-by-step explanation:
Consider an element 
We know that 
Here, m and n are exponents and a is a base. Exponent refers to the no. of times a term is multiplied by itself. Another word for exponents is powers.
Other Properties of exponents:

Here, we are required to divide
by
.
Consider 
We will solve
separately.
Here,

So, 
Answer:
yes
Step-by-step explanation:
Answer: 4x - 13
<h2>
Step-by-step explanation:
</h2>
<em>First, we need to get triple of x:</em>
Triple of x is: 3x
<em>Next is to get the difference between 3x and 13:</em>
x + 3x -13
4x - 13
Hence, the variable expression is 4x - 13