A.) some irrational numbers are natural numbers.
Answer:
430
Step-by-step explanation:
The "product" means multiply
215*2=430 or you can break it up:
215+215=430
Answer:
(1) You can try to calculate length of AB, BC, CD, AD, AC, BD to make sure the order of vertices. (other way: you can plot them to see form of trapezoid and then find out positions of 4 vertices)
(2) From (1), identify 2 bases of trapezoid: AB and CD
=> Length of mid segment = (lengAB + lengCD)/2
=[ sqrt[(0-3)^2+(5-3)^2] + sqrt[(5-(-1))^2+(-2-2)^2] ]/2 = ~5.4
Other way
Define two points create mid segment P1 and P2
P1 is middle of AD = (A+D)/2 = (-0.5,3.5)
P2 is middle of BC = (B+C)/2 = (4,0.5)
=> Length of P1P2 = sqrt[(-0.5-4)^2+(3.5-0.5)^2] = 5.4
Answer:
C
Step-by-step explanation:
Given
x² - 3x - 12 = 0 ( add 12 to both sides )
x² - 3x = 12
To complete the square
add ( half the coefficient of the x- term )² to both sides
x² + 2(-
)x + 
= 12 +
(x - )² = 
( take the square root of both sides )
x - = ± 
= ± 
( add to both sides )
x = ±
Then
x = + ≈ 5.27 ( to the nearest hundredth )
x = - ≈ - 2.27 ( to the nearest hundredth )
9x + 4x - 3x
9x + 4x = 13x
13x - 3x = 10x
10x = answer
Hope this helped!
