Cual es la respuesta 6r-5t=-11 8p-3q=8 7t+-8r=15 2p+9q=15 9x-2y=-3 7y-12x=17

2-digit numbers less than 91 which are 1 less than a multiple of 10

Kapil needed to buy a long wooden beam. he went to two sawmills that each charge an initial fee plus an additional fee for each meter of wood. the following equation gives the price (in dollars) of a wooden beam from the first sawmill as a function of its length (in meters). p = 5+20xp=5+20x

If the value of x increases by 5, how does the value of m(x + 3) change? a) it increases by 5m. b) it increases by 8m. c) it decreases by 5m. d) it decreases by 8m.