Joanna went school supply shopping. she spent $30.70 on notebooks and pencils. notebooks cost $2.20 each and pencils cost $1.09 each. she bought a total of 19 notebooks and pencils. how many of each did she buy?

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent ?

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b

Select all expressions that are equivalent to 2(3x + 7y). question 1 options: 6x + 14y 6x + 7y 1(6x + 14y)