Answer:
28
Step-by-step explanation:
First multiply 8 by 4 to get 32. Now there is a small triangle in the bottom. Multiply 4 by 2 to get 8. Then divide 8 by 2 to get 4, the area of the triangle. Now lastly 32-4 to get 28 square units, the area.
It's not commutative:
<em>a</em> * <em>b</em> = 3<em>a</em> + 2<em>b</em>
but
<em>b</em> * <em>a</em> = 3<em>b</em> + 2<em>a</em>
We have equality only for
3<em>a</em> + 2<em>b</em> = 3<em>b</em> + 2<em>a</em> → <em>a</em> = <em>b</em>
Answer: 180.18
Step-by-step explanation:
Answer:
a = 5
b = 1.3
c = 6.3
Step-by-step explanation:
To find the values of a, b and C respectively, let's find a first by recalling that the diagonals of a rhombus are perpendicular to each other.
Therefore, the angle given as (14a + 20) = 90°
Solve for a
14a + 20 = 90
14a = 90 - 20
14a = 70
a = 70/14
a = 5
==>To find b, also recall that all sides of a rhombus are equal.
Therefore 3b + 4 = 13b - 9
Solve for b
4 + 9 = 13b - 3b
13 = 10b
13/10 = b
b = 1.3
==>Find value of c
c = a + b
c = 5 + 1.3
c = 6.3