R1 Exemption Test – Verified Math Concepts and Formula Review for Foundational Skills With Solutions

R1 Exemption Test – Verified Math Concepts and Formula Review for Foundational Skills With Solutions General form - ANSWER -Ax+By+C=0 (where a and b cannot both be 0) Linear equation as a function... - ANSWER -y = f(x) Break down each part of the slope intercept form - ANSWER -y=mx+b m = slope b= y intercept What does the 2 and 1 mean in y=2x+1 - ANSWER -Start at positive 1 on the y intercept and go up to over one. What is an average - ANSWER -The number that represent multiple values How do you find the average of a data set - ANSWER -Add up all the numbers and than divide by how many number's there are all together. How do you think the missing number in an average (Calculating what you need on next test to keep a average) - ANSWER -Put X in for the missing value. Add up all test grades + x set it equal to final average. Cross multiply and solve equation. Compound Interest Formula - ANSWER -A = P(1 + r/n)^(n x t), r is the rate, n is the number of times compounded, t is time Calculating percent increase - ANSWER -increase = new number - original number / 100 % increase = increase / original number x 100 (If ANSWER is negative it is a decrease) Calculating percent decrease - ANSWER -Decrease = original number - new number % decrease = decrease / original number x 100 (If ANSWER is positive it is an increase) Adding fractions / Subtracting - ANSWER -Make sure to get a common denominator Multiplying fractions - ANSWER -To multiply fractions, multiply the numerators and multiply the denominators Dividing fractions - ANSWER -keep change flip. (Keep first fraction, change division sign to multiplication and flip the numerator and denominator of the second fraction) Perimeter of a square - ANSWER -P=4S Perimeter of a rectangle - ANSWER -P=2L+2W Perimeter of a triangle - ANSWER -P=a+b+c Perimeter of a right triangle with side A+B - ANSWER -P=A+B+square root of a^2+b^2 Perimeter of a circle - ANSWER -2(pi)r Area of a square - ANSWER -A=s^2 Area of a rectangle - ANSWER -A=lw Area of triangle - ANSWER -A=1/2bh Area of a parallelogram - ANSWER -A=BH