Answer:
1
Step-by-step explanation:
3(-2y) +2y = -4
-6y+2y=-4
-4y=-4
y=1
Answer:
I think it is the first one.
Step-by-step explanation:
I think that becuase it is equal.
16-9=-7 nhbjjkljlhgcfgdfcjjjklhgfch;ljkhgfdfchk;klhjgf
Perimeter is when you add all the sides together...but oh, no! There are two sides missing! So we have to find it. The horizontal like could be x and the vertical, the y. x would be 3 because one side is 7 and the other side is 4, so if we subtract them, we get 3. Same for the vertical, the y would be 3. (3+3=6)
Now we could add all sides to get the last choice, or 26 cm.
Answer:
30cm
Step-by-step explanation:
Assuming that the thickness of the books is 2cm (This is a reasonable assumption, as books are almost always longer and wider than they are thick, and assuming that the books are stacked flat on top of one another, faces up or down, and not sideways, the question becomes 'What is the height of 15 books stacked on top of one another, if each book is 2cm thick?' The answer to this question is 15*2 or 30.
