Answer:
a x (b + c) or a x (b - c)
4 × (11 + 10)
or
4 × (22 - 1)
Step-by-step explanation:
20 + 64 = 84
84 ÷ 4 = 21
21 - 10 = 11
22 - 1 = 21
Answer:
an organism killing another organism for food
Answer:
The Y Coordinate is always written second in an ordered pair of coordinates (x,y) such as (12,5). In this example, the value "5" is the Y Coordinate. Also called "Ordinate"i think
Step-by-step explanation:
Answer:
<em>The sister's age is 8 and the brother's age is 4</em>
Step-by-step explanation:
Let's make:
x = age of the brother
y = age of the sister
x - 2 = age of the brother two years ago
y - 2 = age of the sister two years ago
Two years ago, the age of the sister was three times greater than the age of the brother:
y - 2 = 3(x - 2)
Now, the relation doubles:
y = 2x
Substituting in the first equation:
2x - 2 = 3(x - 2)
Operating:
2x - 2 = 3x - 6
Subtracting 3x -2:
2x - 3x = 2 - 6 = -4
Solving:
x = 4
y =2x = 8
The sister's age is 8 and the brother's age is 4
