Answer:
A is the answer
12 in
first substitute the variables
then 78=1/2h(5 + 8)
this makes it an equation
add similar terms which equals to
78=1/2xhx13
then divide both sides by 13
6=1/2xh
lastly divide both sides by 1/2
12=h
Step-by-step explanation:
proof
A=1/2x12(5 + 8) then
A=1/2x12x13 then
A=6x13 then
A= 78in^2
Answer:
1/2
Step-by-step explanation:
When you have two points you need to use the slope formula:

x1 and y1 is the first point and x2 and y2 is the second point, remember that the first number is X and the other is Y so...

1/2 is the slope of the points
4) 41% of 78 is what?
Answer = 31.98
Work:
x = 41/100 x 78
x = 3198/100
x = 31.98
6) 58% of what is 63.4?
The number is = 109.31
Explanation:
Let the number be = x
58/100 (x) = 63.4
x = 63.4 x (100/58)
x = 6340/58
x = 109.31
Answer:Triangle ABC and BCD are congruent by the side side side triangle congruence theorem
Step-by-step explanation: