Answer:
A ≈ 8133.27 m²
Step-by-step explanation:
Sum the parts of the ratio 6 + 7 + 8 = 21 parts
Divide the perimeter by 21 to find the value of one part
420 ÷ 21 = 20 ← value of 1 part of the ratio, hence sides of triangle are
6 × 20 = 120
7 × 20 = 140
8 × 20 = 160
To calculate the area (A) we can use Hero's formula
A =
Where s is the semi perimeter and a, b, c the sides of the triangle
let a = 120, b = 140 , c = 160 and s = 420 ÷ 2 = 210
A =
=
= ≈ 8133.27 m²
Answer:
Step-by-step explanation:
For these we always want to see how much each term is decreasing by, this will tell us what kind of series it is.
-40, -47, -54, -61
Each time it DECREASES by -7, so it is an arithmetic sequence
The explicit form is found with two parts. the start and how much each term changes by. The start is -40 and the change is -7, so the explicit formula is -40 - 7(n-1). This is assuming the first term is a_1. If you are starting with a_0 instead you want to make (n-1) be n. so if a_0 = -40 then you have -40 - 7n but if -40 = a_1 then you have -40 - 7(n-1)
the next one has a "common difference" of 30. so now if -8 is a_0 you have -8 + 30n but if -8 is a_1 then you have -8 + 30(n-1)
X can not = 0 because if I did your answer would not be a fraction it would be 0
A. Niko earns 209.85 more than Miley in one week
B. If they both worked two weeks, Taylor
would make 661.60 more than Miley
C. Pinky will earn 4,396.80 in four weeks
D. Miley will have to work appoximately 10 weeks in order to earn the same amount as Pinky earned in four weeks.