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Xelga [282]
3 years ago
10

Joani has some stuffed animals. She has 2 times as many as Lily. Lily has 6 stuffed animals. Joanie gave 2 away and bought 4 mor

e. How many stuffed animals does Joani have now?
Students's solution: Lily has 6 stuffed animals, so Joani had 6 × 2 to begin with. So Joani had 12 stuffed animals. She gave away 2, so 12 – 2 = 10. She bought 4, so 10 + 4 = 14. So Joani has 14 stuffed animals.

Here is another problem that can also be solved by working backwards.

Wyatt has 3 times as many baseballs as golf balls. He has 5 fewer tennis balls than baseballs. Wyatt has 4 golf balls.

How many tennis balls does Wyatt have?
Mathematics
2 answers:
8090 [49]3 years ago
8 0
We start with his golf balls. He has four, so three times that number is 12. He has 12 baseballs. If we subtract 5 from 12, we can find how many tennis balls he has. So, Wyatt has 7 tennis balls.
Nookie1986 [14]3 years ago
7 0
7 tennis balls. 4 golf balls x 3 = 12 baseballs. 12 baseballs -5 = 7 tennis balls.
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What is the square root of 64 over 225 with a negative outside of the radical?
irinina [24]
The square root of  (64/225)  is the same as  √64 / √225 . 
That could make the whole thing easier.

Do you know what either of those separate square roots is ?

You're right !    I'm so impressed!
The square root of  64  IS  8, and the square root of  225 surely is  15 .
You really know your stuff !

So now, the expression is  √64 / √225  =  <em>8 / 15</em> .

Oh, I almost forgot, it has a negative sign before it.  OK,so the answer is <em>- 8/15</em> .

5 0
3 years ago
How can square roots be written so that the radicand has no square factors?
larisa86 [58]

Answer:

You can do this by dividing the radicand by the square number , and multiplying the radical by the root of that number.

e.g.

\sqrt{96} \\= \sqrt{16 \times 6}\\= 4\sqrt{6}

5 0
3 years ago
The population of rabbits in a national forest is modeled by the formula P= 12,000 + 1000 (t+1) where t is the number of years f
V125BC [204]
In this formula, 1000(t+1) represents the growth rate of the rabbits.  We want the number right now, so sub in 0 for t.

P=12,000+1000(0+1)
P=12,000+1000
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Hope this helps!!!
4 0
3 years ago
An item costs $300 before tax, and the sales tax is $9.90 . Find the sales tax rate. Write your answer as a percentage.
Step2247 [10]

Answer:

3.33%

Step-by-step explanation:

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8 0
2 years ago
436+789+6543-34+368-23=<br><br><br> 15 points
dmitriy555 [2]
The answer is 8079. :)

 
3 0
3 years ago
Read 2 more answers
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