Answer:
x = 65
Step-by-step explanation:
using the Altitude- on- Hypotenuse theorem
(leg of big Δ )² = (part of hypotenuse below it ) × (whole hypotenuse)
x² = 25 × 169 = 4225 ( take square root of both sides )
x =
= 65
Given parameters:
Total length of curtains bought = 20m
She used 8m for the living room
She used 7m for the dining room
unknown:
Quantity used for the kitchen = ?
Solution:
Quantity used for the kitchen = Total length - (living room + dining room)
Input the parameters given solve;
Quantity used for the kitchen = 20 - (8 + 7) = 5m
The length of curtain used for the kitchen is 5m
Answer:
x≥72
Step-by-step explanation:
Put into an equation then solve.
x/8≥9
x8 x8
x≥72
Hope that helped!
Answer:
Solving the equation using quadratic formula we get 
Step-by-step explanation:
We need to use the quadratic formula to find the solutions for

<em>(Note: quadratic formula is used when x^2 is in the equation. So considering 3x^2 instead of 3x^3)</em>
The quadratic formula is: 
From the given equation
we have a =3, b=8 and c =-1
Putting values in the formula and finding solutions:

So, Solving the equation using quadratic formula we get 