Answer:
Step-by-step explanation:
xy = 300
x + y = 50 Solve for y
y = 50 - x substitute into xy = 300
x(50 - x) = 300 Remove the brackets.
50x - x^2 = 300 Bring the left to the right.
0 = x^2 - 50x + 300
This is a quadratic. It will have 2 solutions.
a=1
b = - 50
c = 300
Put these into the quadratic equation.
It turns out that x has two values -- both plus
x1 = 42.03
x2 = 6.97
x1 + y1 = 50
42.03 + y = 50
y = 50 - 42.03
y = 7,97
(42.03 , 7.97)
====================
x2 + y2 = 50
6.97 + y2 = 50
y2 = 50 - 6.97
y2 = 43.03
(6.97 , 43.03)
Answer:
total area = 124 sq. in
Step-by-step explanation:
Area = ( 11 × 10 ) + ( 2 × 7 )
= 110 + 14
= 124 sq. in
Answer:
Step-by-step explanation:
9
3
4
Let 1/x=the time it takes for person b to paint
let 1/22x the time that it takes for person a to paint
lastly we have the following since we know that when they work together that is how long it takes

to solve we first multiply both sides by 1694x

we then combine like terms

lastly we divide both sides by 22
Answer:
351.54
Step-by-step explanation:
The length of the training track = 80m plus 80m + circumference of a circle
Circumference:
Pi x d = 3.14 x 61 = 191.54
Next 80 + 80 = 160.
The running tracks whole length = the sum of these 2 newly found values = 351.54
Hope this helps