There are 7000 ones in 7 thousands
So you have length
l=legs and b=base
the first perimeter is 2l+b=8.5 since there are 2 legs
the second perimeter is 4l+b=15.5 since the legs are now 2l long instead of l
subtract the top problem from the bottom problem
(4l+b)-(2l+b)=15.5-8.5
2l=7 so l=3.5
if l=3.5 and 2l+b=8.5, 7+b=8.5, so b=1.5
check by plugging it into the second perimeter
4(3.5)+1.5=15.5-->14+1.5=15.5 it's correct yay!
Answer:
x = - 
Step-by-step explanation:
given the equation
(x - 2) = 4x
multiply both sides by 5 to eliminate the fraction
2(x - 2) = 20x
2x - 4 = 20x ( subtract 2x from both sides )
- 4 = 18x ( divide both sides by 18 )
x = - 
= -
Answer:
b² = a² + c² - 2ac cos B
Step-by-step explanation:
The cosine rule can be use when you are given three sides of a triangle and ask to find any angle or when you are given two sides and a included angles(the angle between the two sides given) and ask to find the length of a side.
The equation Sophia can use to solve for the side length(b) of a triangle when given two length and the included angle can be expressed below. Sophia was given two sides and an included angle and was asked to find a side length b.
For sides a, b and c the cosine rule can be represented below
a² = b² + c² - 2bc cos A
b² = a² + c² - 2ac cos B
c² = a² + b² - 2ab cos C
The equation required base on your question is
b² = a² + c² - 2ac cos B
