17. the total weight of a rock depends on its size and is proportional to its density. in this context, density is the weight per cubic inch. let w denote the weight of the rock in pounds, s the size of the rock in cubic inches, and d the density of the rock in pounds per cubic inch. if a 48-cubic-inch rock weighs w pounds, write an equation that shows the proportionality relation. a. d 48 w b. dw+48 48 c. d w 48 d. d 10w 48

Ucan draw that on a graph sheet and count the no. of units and apply the area formula of rectangle

Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle

First subtract 10 from both side
y^2+6y-16=0
(y+8)(y-2)=0
-8 and 2