Answer:
16
Step-by-step explanation:
bh/2=A
8*4/2=A
16=A
Answer: 40.87
Step-by-step explanation:
Answer:
a)1 : 4 and 5 : 20
Step-by-step explanation:
If a ratio is a proportion that means the
quantity on the left hand side is lesser than the quantity on the right hand side; it's a part of a whole, a small fraction.
Example of proportion ratios:
4 : 7
7 : 29
90 : 200
68 : 140
Example of non-prpotion ratios:
7 : 4
80 : 19
29 : 20
Vertical angles are equivalent so
7x-4=87
and 4 to both sides to remove the negative numbers, the new equation is
7x=91
Then divide both sides by 7 and you get the answer
1x=13
Makes sense?