<span>2/5 would be one...tell me if you need more.</span>
Think of x being the cost of a knife and y being the cost of a spoon.
x = 3y would show that a knife cost 3 times what a spoon does.
We know from the info that 12 knives and 9 spoons = 82.80. It could be written as 12x + 9y = 82.80
Substitute 3y from our formula into the equation for x.
12(3y) + 9y = 82.80 becomes 36y + 9y + 82.80 which becomes 45y = 82.80, then divide both sides by 45 to solve for y and you get 1.84
Going back to our original equation, x = 3y, we can substitute 1.84 for y and find that x = 5.52.
So we find a knife cost $5.52
Answer:
Step-by-step explanation:
The first one is in standard form;
the second one is in point-slope form;
the third one is in slope-intercept form;
the last one is in standard form
These are all lines, so as you can see, there are 3 different formats for writing the equation of a line.
90 29 52 48 18 20 45 13 51 37 64 (:
May u please have brainlist
185 plus the second number which is 196 plus 90 is 471