SAT Pastpaper with Solutions

A biodegradable object with a mass of 36 grams started to decompose after being discarded. Each month after the object started to decompose, the remaining mass of the object was approximately 70% of the mass of the preceding month. Which function f gives the approximate remaining mass, in grams, of the object x months after the object started to decompose?

Which expression is equivalent to (8 y z)(y)(3 z) ?

The graph of a system of a linear equation and a nonlinear equation is shown. What is the solution (x, y) to this system?

The function f is defined by f(x)= -x² +86. What is the value of f(x) when x=10 ?

In the bar graph, which category has a frequency that is the frequency of category E ?

In triangle XYZ shown, segments XY and YZ each have length 128 millimeters. Which statement is sufficient to prove that all three angles in the triangle have equal measure?

The graph of the linear function f is shown, where y=f(x). What is the slope of the graph of f ?

Which measure, in radians, is equivalent to (36 180) ?

In the triangle shown, what is the value of x?

A customer spent $12 text to purchase oranges at $3 per pound. How many pounds of oranges did the customer purchase?

The y-intercept of the graph shown is (x, y). What is the value of y?

Each side of a triangle has a length of 27 . What is the perimeter of this triangle?

 f(r)=15+3 r

The function f represents the total cost, in dollars, of attending a carnival when r rides are ridden. How many rides can be ridden for a total cost of $51？

The price of an item increased by p% from $78 to $81. What is the value of p?