Answer:
Yes
Step-by-step explanation:
There are 4 cups in a quart.
2 times 5 = 10
10>4
Not so sure about the second one, but the first one is pretty simple:
The area of a circle = pi x radius^2
Since you need to find the area of the entire dvd, I'm assuming they mean if the hole in the center wasn't there, so add that to the diameter.
12+1.5 = 13.5
Half of the diameter is the radius, so half of 13.5 = 6.75
Now, multiply pi (3.14) by the radius, but have the radius squared. You'd write the equation like this:
3.14 x 6.75^2 (or on paper, the ^2 would be a small two diagonal from the 5)
Actual answer: 143.06625
You can round that to 143.
The correct answer is: 236,588 mg.
5x+y=8 equation 1
x+2y=5 equation 2
Subsitute (1,3) in bothe equations if the right side is equal to.the left side of the equation then (1,3) is a solution
5(1)+3=8
1+2(3)=7
7 isn't equal to 5 so 1,3 is NOT a solution for this system of equations