<span> ϕ = (1+√5)/2 ≈ 1.618
10.4 * ϕ ≈ 16.8
10.4 / ϕ ≈ 6.4
Answer: b </span>
58 to x should be the ratio of 6/3 or 1/2 if they are similar.
Find out how much bigger 58 is compared to 6, the matching side on the other polygon.
58/6 = ~9.7
The x side should be half of this, just like it is on the smaller polygon.
9.7/2 = 4.85
4.85 x 3 = 14.55
Answer: -3
Step-by-step explanation:
-4 +
can be written as x
which is the same as 2
Also , can be written as x , which is the same as 5
Substituting into the main question , we have
-4 (2 ) + 5
= -8 + 5
= -3
You can use simultaneous linear equations in two variables to solve this word problem.
Let Juwan's age be
and Christy's age be
Let us sum their ages and equate it to 92
Ten years ago, Juwan's age was
and Christy's age was
By then Juwan's age was 3 times Christy's age
Expand and simplify,
Put equation (2) in equation (1)
Juwan is 64 now