Sam has $40. he buys a book for $12.99 and a puzzle for $15.49.
which equations can be used to find how much money sam has left?
choose all that apply.
a. $40 – $28.48 = $11.52
b. $40 + $12.99 = $52.99
c. $15.49 – $12.99 = $2.50
d. $12.99 + $15.49 = $28.48
e. $40 – $2.50 = $37.50

Measures of the angle of r, 31 s (x+4) t (3x+9)

10 points? ? +++ me asap gabriella uses the current exchange rate to write the function, h(x), where x is the number of u.s. dollars and h(x) is the number of euros, the european union currency. she checks the rate and finds that h(100) = 7.5. which statement best describes what h(100) = 75 signifies? a) gabriella averages 7.5 u.s. dollars for every 100 euros. b) gabriella averages 100 u.s. dollars for every 25 euros. c) gabriella can exchange 75 u.s. dollars for 100 euros. d) gabriella can exchange 100 u.s. dollars for 75 euros.

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