SAT Pastpaper with Solutions

In triangle RST, the measure of angle R is 40°,the measure of angle S is x°,and the measure of angle T is (5x-4)°.Point L lies on RS,point K lies on ST,and LK is parallel to RT.What is the measure,in degrees,of angle SKL ?(Disregard the degree symbol when entering your answer)

In the xy-plane, line I passes through the point (0,0) and is parallel to the line represented by the equation y = 7x + 6 .If line I also passes through the point (6,d), what is the value of d?

In the xy-plane,which of the following does NOT contain any points that are part of the solution set to 2x- 9y > 25?

The product of a positive number x and the number that is 1 less than x is equal to 342.What is the value of x?

To study fluctuations in leaf water potential, samples of wood were taken from 21 trees and cut in the shape of a cube. The length of the edge of one of these cubes is 3.000 centimeters. This cube has a density of 0.240 grams per cubic centimeter. What is the mass of this cube, in grams?

In triangle ABC , the measure of angle A is four times the measure of angle B , and the measure of angle C is 12 degrees less than the measure of angle B.What is the measure of angle A in degrees?

A sample of a certain isotope takes 30 years to decay to half its original mass. The function s(t)= 148 gives the approximate mass of this isotope, in grams, that remains t years after a 148-gram sample starts to decay. which statement is the best interpretation of s(60)= 37 in this context ?

At a convention center,there are a total of 475 visitors Each visitor is located in either room A,room B,or room C.If one of these visitors is selected at random,the probability of selecting a visitor who is located in room A is 0.68,and the probability of selecting a visitor who is located in room B is 0.24.How many visitors are located in room C ?

In the figure shown, line k intersects lines r and s.If w = 128, which additional piece of information is sufficient to prove that lines r and s are parallel?

A circle has a radius of r inches. A sector of the circle has a central angle of 120° ，which of the following expressions represents the area of the sector in square inches?

The triangle shown has one side with a length of x inches and two sides each with a length of y inches. The perimeter of the triangle is 116 inches. Which equation represents this situation?

Antwon's hair will grow at a constant rate from a length of 3 inches to a length of 5 inches.The equation 0.25t+3=5 describes this situation, where t is the number of months it will take for Antwon's hair to reach a length of 5 inches. Which of the following is the best interpretation of 0.25 in this context?

The list gives the mass, in grams, of 5 ruffed lemurs.
3,840;3,800;3,020; 3,850; 3,020
What is the mean mass, in grams, of these 5 ruffed lemurs?

The function f is defined by f(x) = 4x-1/4 . What is the y-intercept of the graph of y = f(x) in the xy-plane?

The given equation relates the positive numbers n,p and v.Which equation correctly express p in terms of n and v ?

In the given system of equations, a is a positive integer constant.The system has no real solutions. What is the least possible value of a ?
y=- 1.5
y=x²+7x+a

The width of a rectangle is 10 centimeters. The length of the rectangle is 25 centimeters longer than the width. What is the area, in square centimeters, of this rectangle?

The cost y,in dollars,for a manufacturer to make a rings is represented by the line shown.What is the cost, in dollars,for the manufacturer to make 100 rings?