Answer:
Step-by-step explanation:
Each circle is pi*r*r (pi r squared)
So 2*pi*r*r
The top of the rectangle if just the circumference of the circle = 2*pi*r
So the area of the rectangle is 2*pi*r*h
So the total area =2*pi*r*r+2*pi*r*h
Answer:
16.8
Step-by-step explanation:
3x+2y
3(4)+2(2.4)
12+4.8
16.8
Answer: Albert's grand father is 50 years older that Albert this year.
Step-by-step explanation:
Let x represent Albert's age this year.
Let x represent Albert's grandfather age this year.
This year Albert and his grandfather's ages total to 64 years. This means that
x + y = 64- - - -- - - - - -1
In 3 years, Albert's grandfather will be 6 times as old. This means that
y + 3 = 6(x + 3)
y + 3 = 6x + 18
y = 6x + 18 - 3
y = 6x + 15
Substituting y = 6x + 15 into equation 1, it becomes
x + 6x + 15 = 64
7x = 64 - 15 = 49
x = 49/7
x = 7
y = 6x + 15 = 6 × 7 + 15
y = 57
The difference between their ages is 57 - 7 = 50 years
Answer:
100
Step-by-step explanation:
10 is 10% of X
Equation: Y = P% * X
Solving our equation for X
X = Y/P%
X = 10/10%
Converting percent to decimal:
p = 10%/100 = 0.1
X = 10/0.1
X = 100
Answer:
70
Step-by-step explanation:
180 -(60+65) = 180 - 125 = 55
180 - (50 + 55) = 180 - 105 = 75
180 - (35 + 75) = 180 - 110 = 70
