Answer: 85.104
Step-by-step explanation: Adding decimals is something you will use a lot. Take the time to learn it now. So when you are adding decimals there are some important things to keep in mind. 1. Line the decimals up. Let me explain. Lets do a example. Lets say its 14.5+ 15.74. The first thing you would need to do is line them up like this-->
14.5
15.74
+____
After you do that, Do you see a black space next to the 14.5? When adding decimals this is a big nono. So what you can do is add a 0. Adding a zero is only applicable when you have one number that has 1 more number(its my best way to explain it).( so like you would add a zero if your equation was like 23.5 +18.99. but you wouldn't do it if it was 17.5+19.4). Example equation should look like this:
14.5
0<---- add the zero!
15.74
+____
Step 2. Put the decimal down to where it lines up. Like this:
14.5
0
15.74
+____
.<------ make sure it lines up!
Step 3. Add regularly. Just ignore the decimal in the equation and just add. The answer would be 30.24. If you don't know how to add, I don't think your old enough for a brainly account:)
Step 4. Remove the zero. Zero as a number means nothing. So its ok in math to add a zero at the end of a decimal. So 4.0 is the same as 4 or 4.0000000000000. So when you have another problem, and your answer is something like 95.320, you can just remove the zero. So it would be 95.32:)
Hope I Helped! (this took me a long time to type out)
:)
0.44
dadadadadadadadadadadadadadada
Since it's isosceles, ∠ABC = (180-30) / 2 = 75
Answer:
8 quarters
12 nickels
12 pennies
16 dimes
Step-by-step explanation:
The trick is to ASSUME the dimes.
Start by thinking about the three explicit premises and the one implicit premise.
1) Quarters = 1/6 of total coins
2) Nickels = 1.5 the number of quarters
3) Pennies = 1/4 of total coins
Also, ASSUME an unknown number of dimes to fill in the gap.
48 Total Coins = $4.32
⅙ of 48 = 8 8 quarters = $2.00
1.5 x 8 = 12 12 nickels = $0.60
¼ of 48 = 12 12 pennies = $0.12
Add those coins = $2.72
Take the known total and minus this sum.
$4.32 - $2.72 = $1.60
16 dimes = $1.60
Thus, you have the following:
8 quarters (⅙ of total coins) $2.00
12 nickels (1.5 the number of quarters) $0.60
12 pennies (¼ the number of total coins) $0.12
+ 16 dimes $1.60
Total Coins 48 $4.32
Substitute -2 in for x and get (9)^-2
Flip the equation so that the exponent is positive and get 1/9^2
Work it out 1/(9*9) = 1/81
