Answer:
See below
Step-by-step explanation:
Using formula
- x^2 - y^2 = (x + y)(x - y)
Applying to given expression
- 36 - 9 =
- 6^2 - 3^2=
- (6 + 3)(6 - 3)=
- 9*3=
- 27
Layla had the higher score by 20 points.
Step-by-step explanation:
Given,
Points for correct answer = 10 points
Points for incorrect answer = 20 points
Loss means subtraction;
Therefore,
Total points of Ji = Correct answers*10 - Incorrect answers*20
Total points of Ji = 7*10 - 3*20
Total points of Ji = 70 - 60
Total points of Ji = 10 points
Total points of Layla = Correct answers*10 - Incorrect answers*20
Total points of Layla = 5*10 - 1*20
Total points of Layla = 50 - 20
Total points of Layla = 30 points
Difference = Points of Layla - Points of Ji
Difference = 30 - 10 = 20 points
Layla had the higher score by 20 points.
Keywords: multiplication, subtraction
Learn more about subtraction at:
#LearnwithBrainly
Put 16 where n is, then do the arithmetic.
... a(16) = -6 + 3(16 -1)
... a(16) = -6 + 45
... a(16) = 39
The given quadrilateral ABCD is a parallelogram since the opposite sides are of same length AB and DC is 4 and AD and BC is 2.
<u>Step-by-step explanation</u>:
ABCD is a quadrilateral with their opposite sides are congruent (equal).
The both pairs of opposite sides are given as AB = 3 + x
, DC = 4x
, AD = y + 1
, BC = 2y.
- AB and DC are opposite sides and have same measure of length.
- AD and BC are opposite sides and have same measure of length.
<u>To find the length of AB and DC :</u>
AB = DC
3 + x = 4x
Keep x terms on one side and constant on other side.
3 = 4x - x
3 = 3x
x = 1
Substiute x=1 in AB and DC,
AB = 3+1 = 4
DC = 4(1) = 4
<u>To find the length of AD and BC :</u>
AD = BC
y + 1 = 2y
Keep y terms on one side and constant on other side.
2y-y = 1
y = 1
Substiute y=1 in AD and BC,
AD = 1+1 = 2
BC = 2(1) = 2
Therefore, the opposite sides are of same length AB and DC is 4 and AD and BC is 2. The given quadrilateral ABCD is a parallelogram.
