Two terms that add to 22 and multiply to give 21 are 21 and 1. Replace 22x with 22x and x.
7x^2 + 21x + x + 3
7x (x + 3) + 1 (x + 3)
(7x + 1) (x + 3)
<h3><u>given</u><u>:</u></h3>
base= 25mm
height= 28mm
<h3><u>to</u><u> </u><u>find</u><u>:</u></h3>
the volume of the pyramid.
<h3><u>solution</u><u>:</u></h3>
v= a^2 h/3
v= 25^2 28/3
v= 5833.33333
v= 5833.3mm^3
So Sahra is 3 times as old as her daugter. That means that the sum of their age is the daughters age times 4.
We can prove that by saying the daughters age is x. Sahra's age must be 3x. Their sum must be x+3x = 4x.
So to get the daughters age we divide the sum by 4, which is 8.
Okay so in a gallon there are 16 cups, in this case 100 cups is equivalent to 6.25 gallons. 6.25 times 3.12= 19.5
Therefore $19.5 is how much the gas cost!
