Hope it helps you !!!!!!! And if you want the step I will show you
Answer:
12w+15
Step-by-step explanation:
Distribute 3 to whats inside of parentheses
3*4w=12w
3*5=15
12w+15
Answer:
a common denominator for 3/7 and 1/3 is 21
Answer:
58.3km
Step-by-step explanation:
58300 ÷ 1000 = 58.3km
Answer:
10cm
Step-by-step explanation:
First let's define variables a and x:
a = area of rectangle and square
x = side of square
Now let's create an equation to calculate a using the square and an equation to calculate a using the rectangle:
Using square: 
Using rectangle: 
Now we want to solve for x so let's combine the equations since they are both equivalent to a

Simplify

Solving this we get 10 and -3
Since it is impossible for a square to have a negative side value we can conclude that the value is 10cm
This can then be checked by plugging in 10 as x in our equations and seeing if we get the same a value:
Using square: 
Using rectangle: 