Answer:
20 + 10 = 30
Step-by-step explanation:
The sum of x and y is 30. In other words, x plus y equals 30 and can be written as equation A:
x + y = 30
The difference between x and y is 10. In other words, x minus y equals 10 and can be written as equation B:
x - y = 10
Now solve equation B for x to get the revised equation B:
x - y = 10
x = 10 + y
Then substitute x in equation A from the revised equation B and then solve for y:
x + y = 30
10 + y + y = 30
10 + 2y = 30
2y = 20
y = 10
Now we know y is 10. Which means that we can substitute y for 10 in equation A and solve for x:
x + y = 30
x + 10 = 30
X = 20
Summary: The sum of two numbers is 30 and their difference is 10. What are the two numbers? Answer: 20 and 10 as proven here:
Sum: 20 + 10 = 30
Difference: 20 - 10 = 10
It is the paid price with tax included. To calculate the total with tax included, you need the original price plus the amount of tax. If tax is 10 percent, it will be ten cents per dollar. 15.85(1+0.10) = 17.43
Answer: The circumference of a circle can be calculated using: C = 2
π × r
Step-by-step explanation: From the above formula the radius can be calculated as:
r = C
/2
π
So in this situation we have:
r = 6
π
/2
π = 3
Answer:
19.32
Step-by-step explanation:
if 77.28 divided by 4.0 do long division and once you do that check yourself to see if you are correct
I hope I helped you guys! :)