Answer:
a:b
3:7
Step-by-step explanation:
a:b also means a/b
Taking the equation
7a = 3b
Dividing each side by b
7a/b = 3b/b
7 a/b = 3
Divide each side by 7
a/b = 3/7
The ratio is 3/7
a:b
3:7
Answer:
33m
Step-by-step explanation:
1cm=3m
11cm×3m/1cm
centimeter cancel centimeter
and than I times 11 by the 3 meter which give me 33m.
Hoped this helps (⁄ ⁄>⁄ ▽ ⁄<⁄ ⁄)
Answer:
Option 3
Step-by-step explanation:
Answer: let the no of paperback books be x and hardcover books be y
4y - x = 3
Therefore, x - 4y = -3 -----(1)
x + y = 447 ----(2)
Put x = 447 - y in eqn 1
447- y - 4y = -3
-5y = -3 - 447
-5y = -450
y = 90
x = 357
Step-by-step explanation:
Answer:
A.Put each person's name on a separate piece of paper in a bag. Randomly draw the winning name; and D.Roll a number cube. If it lands on an even number, Roddy wins. If it lands on an odd number, Scott wins.
Step-by-step explanation:
In order for it to be a fair decision, both boys have to have an equal chance of being selected.
For choice A, drawing their names from a bag, both names are equally likely to be chosen; that makes this fair.
For choice B, there is 1 way to get both heads when flipping a coin. There are 2 ways to get heads and tails when flipping a coin. This gives Scott a greater chance, so this is not fair.
For choice C, there are 2 ways to get a 1 or a 2. There are 4 ways to get anything else. This gives Scott a greater chance, so this is not fair.
For choice D, there are 3 even numbers and 3 odd numbers. Both boys have an equal chance, so this is fair.
