#17
Use property that the diagonals of a parallelogram bisect each other, =>
x+y=18
y+(can't read)=22
Solve for x and y.
#18
z+60=180 [angles on a line are supplementary]
x=z [opposite angles of a parallelogram are congruent]
y=50 [alternate interior angles between parallel lines AD and BC]
#19
3v=30 [ opposite sides of a parallelogram are congruent ]
solve for v.
2u-1=19 [ ditto ]
solve for u.
#20
(a) AB//DC [ adjacent angles are supplementary ]
(b) PS//QR [ ditto ]
#21
1) a parallelogram with one angle 90 means the adjacent angles are 180-90=90. This in turn means all angles are 90, so the figure is a rectangle (adjacent sides may or may not be equal in a parallelogram).
2) a rectangle with adjacent sides equal must be a square.
Step 1: Find the slope:
This gives you , but we need to find b.
To find b, substitute in one (x,y) pair and it doesn't matter which one. I'll go with (4,-2):
Now take that b-value and plug in into the slope-intercept form:
It's always a good idea to toss in the other x-value from the other point, to make sure it checks out.
Answer:
10
Step-by-step explanation:
3/5 = 15 dogs
divide 15 by 3 and get 5
so each 1/5 = 5 animals
4/5 = 20
5/5 = 25
25-15=10
Answer:
i dont know i need coins
Step-by-step explanation:
5 TIMES 8 equals 15
Answer:
1/4 month per book. other answer options: 0.25 or 25%
Step-by-step explanation:
If he is reading 8 books in two months, each number can be divided by 2 to get his number of books read in one month.
8/2 = 4
2/2 = 1
4 books per 1 month is equivalent to a quarter of a month per book. This means after each month, he will have 4 books read. After two months, he will have his 8 read.