SAT | Math (No Calc)

when they have the same base

When can numbers with exponents be divided?

subtract the numerator’s exponent with the denominator’s exponent (leave base as is)

How do you divide exponents with the same base?

plug in numbers to the equation and answer choices to see if it matches

What can you do if you’re looking for the equivalent equation?

sin(90-x)=cosx

the sin of an angle is equal to the cos of it’s complement

plug in answers starting with the smallest number

What should you do when the question asks for the least possible value?

set both lines equal to each other to find x and plug x back into the equation to find y

How do you find the intersection of 2 lines?

plug into y=mx+b and solve for m

how do you find the slope intercept form of a y-intercept and point?

find the change in y over change in x to find the slope, then, plug the point and slope into point slope formula: y-y1=m(x-x1)

when given 2 points with no intercept, how do you find the slope intercept form?

y-y1=m(x-x1)

what is point slope formula?

x^2 + 2xy + y^2

(x+y)^2 =

set each variable equal to a different number and plug into equation an answers choices to see which one matches

what can you do when looking for an equation w/variables in different terms?

c/a

in ax^2 +bx + c, what is the product of roots?

1, sqrt(3), 2

what are the sides of a 30-60-90 degree triangle?