Izzie recently took a math test where each correct answer (a) was worth 7.8 points. she also correctly answered a bonus question worth 15 points. using the equation 7.8a + 15 = 77.4, how many questions on the test did izzie answer correctly? a) 5 b) 8 c) 12 d) 9!

Write a real-world solution that can be represented by the equation y = 7x be sure to explain what the variables represented in the solution

What is the rate of change of a line that passes through (2,-5) and (6,-2)?

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days