Lucas bought some plumbing equipment for $37.48 .the price the paid included a sales tax of 5% what was the price of the plumbing equipment before the tax was added

Given:
Price paid including tax: $37.48
sales tax = 5%

This means that $37.48 is equivalent to 105%

To get the value of the 100% or its original price, we divide the price paid by its percentage rate

$37.48 ÷ 1.05 = $35.70 value of the original price

$35.70 * 5% =  $1.78  value of sales tax
$35.70 + 1.78 = $37.48

This means that 37.48 is 105%. Find 1% by dividing 37.48 by 105. Multiply the answer you found by 100.

For
y=ax^2+bx+c
if a>0, then the paraobla opens up
if a<0, then parabola opens down

given
y=-1x^2-10x+1
-1<0
opens down because leading coefinet is negative

either B or D, they are identical (looks like something was omited)