Answer:
5.
4 + 2(-7 - (5 - 15))
= 4 + 2(-7 - (-10))
= 4 + 2(-7 + 10)
= 4 + 2(3)
= 4 + 6
= 10
6.
((6 - 5)^8 - 1)/(-5(-2) - 4)
= (1^8 - 1)/(10 - 4)
= (1 - 1)/6
= 0/6
= 0
7.
(14² - 8²)/(-3(8 - 3²))
= (196 - 64)/(-3(8 - 9))
= (196 - 64)/(-24 + 27)
= 132/3
= 44
This problem can be solved via a simple ratio and proportion approach. The concept is, the ratio of the actual length to the model length is constant. The solution is as follows:
Actual/Model = 12 m/ 1 cm = x/7.25 cm
Solve for x,
x = 87 m
<em>So, the actual distance is 87 m.</em>
Answer:
sorry
Step-by-step explanation:
Answer:
In a triangle, the segment joining the midpoints of any two sides will be parallel to the third side and half its length ⇒DE is parallel to AC, and DE = 8, AC=16.
Similarly, DF is parallel to BC, and DF=6, BC=12
Step-by-step explanation:
Similarly, EF is parallel to AB, and EF=3.5, AB=7
Hence, perimeter of ΔDEF = 8+6+3.5 = 17.5
