Answer:
60km
Step-by-step explanation:
They travel 30km in the first hour, then turn back and travel the same 30km backwards.
1. $9.00
2. Sorry, I don't understand this problem
3. Ally Cat because it is $1 cheaper
Answer:
18° and 72°
Step-by-step explanation:
let x be the measure of one angle then the other is 3x + 18
The sum of the 2 complementary angles = 90°, hence
x + 3x + 18 = 90
4x + 18 = 90 ( subtract 18 from both sides )
4x = 72 ( divide both sides by 4 )
x = 18
the 2 angles are 18° and (3 × 18 ) + 18 = 72°
Answer:
It would be
Step-by-step explanation:
is equivalent to or .
The decimal place to the right of the tenths place is the hundredths place. The digit in that place is 9.
When the digit to the right of the place you're rounding to is more than 4, you increase the digit in the rounding place by 1.
Here, we have the hundredths digit is 9, which is more than 4, so we increase the tenths digit by 1. The rounded number is
... 56.4
_____
Another way to get there is to add 5 in the hundredths place (the place to the right of the one you're rounding to). When you do that, you get 56.448. Now, throw away all the digits to the right of the one you're rounding to. This leaves
... 56.4
_ _ _ _ _ _ _
The reason I show this last method is to deal with cases like rounding 56.978. By the first rule, you're increasing the digit 9 by 1, which might be confusing. (it requires a carry into the next digit, making 57.0.) If you add .05 to this number, you get 56.978 +.05 = 57.028. Now when you throw away the digits to the right of the tenths digit, you have 57.0.