Nisha did the work below to solve an equation.

step 1 7 b + 3.2 b minus 5 = 18.92
step 2 10.2 b minus 5 = 18.92
step 3 5.2 b = 18.92
step 4 b = 3.64

in which step did nisha make her first error?
step 1
step 2
step 3
step 4

The number of members f(x) in a local swimming club increased by 30% every year over a period of x years. the function below shows the relationship between f(x) and x: f(x) = 10(1.3)xwhich of the following graphs best represents the function? graph of f of x equals 1.3 multiplied by 10 to the power of x graph of exponential function going up from left to right in quadrant 1 through the point 0, 0 and continuing towards infinity graph of f of x equals 10 multiplied by 1.3 to the power of x graph of f of x equals 1.3 to the power of x