Answer:
Let a be the width and b the length
a+3=b
a*b=54
a(a+3)=54
a^2+3a-54=0
a=6
Negative 4 is less than negative 1
Answer: You should multiply first.
Step-by-step explanation:
Please- Parenthesis
Excuse- Exponent
My- Multiply
Dear-Divide
Aunt- Addition
Sally-Subtraction
Hopes this helps you should now know what order to use when solving linear expressions or any problem.
Answer:

Step-by-step explanation:
Height doubles at every 30 seconds, so let's call n how many times it happens, and the t the total time:
n = t/30
If the height doubles one time, it is multiplied by 2, if it doubles 2 times, it's multiplied by 2², for n times, it is multiplied by 2ⁿ, so for an initial height equal to 3:
