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Llana [10]
3 years ago
8

Which method do you prefer to use to find sums- count by tens and ones, use compatible numbers, or use friendly numbers and adju

st? Explain why.
Mathematics
1 answer:
elena-s [515]3 years ago
5 0
Count by tens and ones.
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What is the 6th term in the expression (2x-y)^10
Elis [28]

Hello from MrBillDoesMath!

Answer:

- 8064 x^5 y^5



Discussion:

The binomial theorem gives us the expansion  of  (a + b) ^n  :

(a + b ) ^n

= a^n + na^(n-1)b +  (n(n-1)/ 2!) a^(n-2)b^2 +....


In our case, taking the 6th term above, setting a = 2x, b = -y, and n = 10 gives

( (10*9*8*7*6)/ (5 *4*3*2*1) )  * (2x)^5 (-y)^5r

=  - 8064 x^5 y^5


Thank you,

MrB

4 0
3 years ago
You are making pies to sell at a fundraiser. It costs $3 to make each pie, plus a one-time cost of $20 for a pastry blender and
alexdok [17]

3*pie(or p)+20

It is $5 per pie.

We know the answer has to end is 0 or 5 since all multiples of 5 end it those. The first time 3 goes into 0 or 5 is 15. (3*5=15). You substitute to get 3*5+20=35. You sell 7 pies because 7*5=35, which is the cost for the making of the pies and the rolling pins.

5 0
3 years ago
Is a fixed amount a rate of change?
hodyreva [135]
Yes, A fixed amount is a rate of change.
6 0
3 years ago
Read 2 more answers
6 erasers cost <br> $6.60. Which equation would help determine the cost of <br> 3 erasers?
nevsk [136]

Answer:

the answer is D

Step-by-step explanation:

6 0
3 years ago
Write each mixed number as a fraction and each fraction as a mixed number 4 2/3
emmasim [6.3K]
14/3 is 4 2/3 as a mixed number if that’s what you’re asking.
5 0
3 years ago
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