The number is 42.
Let xy be the number. x is the tens digit, y is the units digit. The ratio of the units digit to the tens digit, y/x, is 1/2. This gives us the proportion
y/x = 1/2
The tens digit is 2 more than the units digit; x = y+2; substituting in our proportion we have
y/(y+2) = 1/2
Cross multiply:
y*2 = (y+2)*1
2y = y+2
Subtract y from each side:
2y - y = y+2-y
y = 2
x = y+2
x = 2+2
x =4
xy = 42
Answer:
1898
Step-by-step explanation:
414(2)+535(2)=P
828+1070=P
1898=P
The solution to the expression is 7r - 8
<h3>How to set up and solve the expression?</h3>
The expression is given as
-r + 6 + 8r - 14
Collect the like terms in the above expression
So, we have
-r + 8r + 6 - 14
Evaluate the like terms in the above expression
7r - 8
Hence, the solution to the expression is 7r - 8
Read more about expressions at:
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Answer:
divide by the number of penguins
Step-by-step explanatin:
There are 6 windows for every 3 penguins. You divide 18 (the number of windows) by 3 to get 6. If there were 2 penguins, the awnser would be four. And if there was 1, it would be 1 1/2.