Answer:
sorry I don't know this average because it's confusing
Answer:
-5/2x+3
Step-by-step explanation:
you reciprocate the slope since you are trying to find a line perpendicular.
From this m=2/5 to -5/2
then use the formula y-y1 =m(x-x1)
then you put in the points
y - - 2= -5/2(x- 2)
y+2= -5/2x +5
-2 -2
y= -5/2+ 3
Make it so that the fractions have common denominators. 12 is a common denominator we can use.
5/6= 10/12 1/4= 3/12
Multiply both numbers by 2. Multiply both by 3.
Now, add.
4 10/12+ 5 3/12= 9 13/12
Simplify.
10 1/12.
I hope this helps!
~cupcake
Answer:
1. 55.271 inches/lb
2. 3.075 inches/lb
3. The denser one is the pine, so it would be heavier.
Step-by-step explanation:
1. density of the pine log (which is a cylinder)
We need the weight/mass and the volume.
V(cylinder) = πr^2 * height
= πr^2 = π(5^2) = 25π = 78.54
= 78.54 * 30 = <u>2356 cubic inches</u>
The weight is 42.63.
Density = mass/volume = 2356/42.63 = <u>55.271 inches/lb</u>
2. density of the oak board (which is a rectangular prism)
We need the weight/mass and the volume.
V(prism) = l*w*h
= 5.5*1.5*3 = <u>24.75 cubic inches</u>
The weight is 8.05.
Density = mass/volume = 24.75/8.05 = <u>3.075 inches/lb</u>
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3. Picture a box made out of stone and a box made out of cardboard. Same dimensions, but the stone one would be way heavier because stone is denser.
Yes 144 is a perfect square because 12*12=144
