the discriminant b^2 - 4ac when the equation is in the form of ax^2 +bx+c=0
13x^2-16x = x^2 -x
we need to get in it the standard form
subtract x^2 from each side
12x^2 -16x = -x
add x to each side
12x^2 -15x = 0
12x^2 -15x -0 =0
a=12 b=-15 c=0
b^2 -4ac
the discriminant = b^2
b^2 = (-15)2 = 225
The amount that'll be saved if the television was bought for cash is $1600.
Cash price of television = $10000
Amount paid through hire purchase will be:
= (20% × $10000) + ($800 × 12)
= (0.2 × $10000) + $9600.
= $2000 + $9600.
= $11600
The amount that could have been saved will be:
= $11600 - $10000.
= $1600
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Answer:
140 miles
Step-by-step explanation:
Given:
The scale on Chelsea's map is 1 inch equals 35 miles.
Distance between two cities on the map = 4 inches
To find: Distance between two cities in miles
Solution:
1 inches = 35 miles
Multiply both sides by 4.
4 inches = 4 × 35 miles = 140 miles
So,
The distance between two cities in miles is 140 miles.
I think what you would do is have the proportion sizes the same. 1 cup of cleaner = 3 cups of water.
Therefore 1 Gallon of Cleaner + 3 Gallons of water = 4 Gallons of solution