Answer: $30 charge for the helmet before tax
Step-by-step explanation:
Let P the pre-tax subtotal
Sales tax = P·5/100
Since we know the sales tax paid, we can substitute its value here:
P·5/100 = $1.50
P = $1.50·100/5 = $150/5 = $30 , charge for the helmet before tax
So,first step is to write
Now we start from inner paranthesis ,we need to first find value of
Answer:
I'm not very sure, however I think you have to replace the sign - for a +.
7 + 4√13