A vertex is a corner
notice, #vertices=#sides
we cannot use a circle since it is 1 side but 0 vertices
square,trapezoid, triangle, pentagon, hexagon, octogon
square+triangle is 4+3=7
next is trapezoid which is 4 sides
the shapes can be
trapezoid, square, triangle or
trapezoid, rhombus, triangle or
trapezoid, rectangle, triangle or
rectangle, rhombus, triangle (there are more)
Answer:
x = 
Step-by-step explanation:
3(2x - 3) + 4(2 - x) = 0 ← distribute parenthesis
6x - 9 + 8 - 4x = 0 , that is
2x - 1 = 0 ( add 1 to both sides )
2x = 1 ( divide both sides by 2 )
x =
Answer:
Original number 26.
Step-by-step explanation:
xy - two-digit number
1) x + y = 8
2) Original two-digit number can be written as
10*x + y
3) If the digits interchanged yx,
then the new number can be written as
10*y + x
4) Double the original number is
2*(10*x + y)
5) New number is 10 more than double the original number
(10*y + x) - (2*(10*x + y)) = 10
6) Now we have the system of 2 equations:
x + y = 8
(10*y + x) - (2*(10*x + y)) = 10 -----> 10y + x - (20x + 2y) = 10 ---> 8y - 19x = 10
x = 8 - y
8y - 19(8 - y) = 10
8y - 152 +19y = 10
27y = 162
y = 6
x = 8 - y = 8 - 6 = 2
x = 2
So, x =2, y = 6.
Original number 26.
Check:
Original number 26.
New number 62.
Double of the original number = 2*26= 52.
New number is 10 more than double the original number :
62 - 52 = 10 True
Answer:
It's not specific enough, I'll come back to you!
