Test 1 Quant review

Question 1

(x+y)^2

Answer 1

x^2+2xy+y^2

Question 2

(x-y)^2

Answer 2

x^2-2xy+y^2

Question 3

Arithmetic Sequence

Answer 3

a1+ (n-1)d

Question 4

Geometric Sequence- infinite

Answer 4

a1/(1-r) where a1 is the first term and r is the factor that you multiply with

Question 5

Geometric Sequence- finite

Answer 5

Sn= a1(1-r^n)/(1-r)
where
 a1= first term
 r= common ratio 
 n = number of terms 
Sn= sum of the first terms

Question 6

rad(x^2)

Answer 6

|x|

Question 7

If the slope of line is negative

Answer 7

• line WILL intersect quadrants II and IV
• X and Y intersects of the line with a negative slope have the same sign
• Therefore if X and Y intersect are positives, the line intersects the quadrant I too, if negative quadrant III.

Question 8

If the slope of the line is positive

Answer 8

• line WILL intersect quadrants I and III

- X intersect is negative, line intersects the quadrant II too, if positive quadrant IV.

Question 9

Every line

Answer 9

(but the one crosses origin or parallel to X or Y axis) crosses three quadrants. Only the line which crosses origin (0,0) OR is parallel of either of axis crosses two quadrants.

Question 10

The line with a slope of 0

Answer 10

parallel to X-axis and crosses quadrant I and II, if the Y intersect is positive OR quadrants III and IV, if the Y intersect is negative.

Question 11

xy

Answer 11

GCF(x,y)*LCM(x,y)

Question 12

average * the total number in the sequence

Answer 12

sum of the n terms

Question 13

1234.567

Answer 13

1 - THOUSANDS
2 - HUNDREDS
3 - TENS
4 - UNITS
. - decimal point
5 - TENTHS
6 - HUNDREDTHS
7 - THOUSANDTHS