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Kruka [31]
2 years ago
9

On a test with 30 questions, Bill answered 80% correctly. How many answers did he get wrong?

Mathematics
1 answer:
AveGali [126]2 years ago
5 0

Answer:

30 X .8=24 30-24=6 bill got 6 questions wrong

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Coefficient of b in expansion of (3+b)^4
Margarita [4]
Are you sure you want ONLY the coefficient of b?  If you expand this, you will have b in 3 of 4 terms.

According to Pascal's Triangle, the coefficients of (a+b)^4 are as follows:

                             1
                        1    2    1
                   1      3    3     1
              1       4     6     4     1

So (a+b)^4 would be 1a^4 + 4a^3b + 6a^2b^2 + 4ab^3 + b^4

Here, you want (3 + b)^4.  Here's what that looks like:

3^4 + 4[3^3*b] + 6[3^2*b^2] + 4[3*b^3] + 1[b^4]

Which coeff did you want?
4 0
2 years ago
I'm thinking of a number. It is either more than 19 or less than 13.
Nostrana [21]

Answer:

is this a trick question?

3 0
2 years ago
ANSWER ASAP!!!<br> PLS HELP. <br> ANSWER BOTH QUESTIONS FOR ALL POINTS.
iVinArrow [24]

Answer:

128°

Step-by-step explanation:

x + 154° + 78° = 360° {being complete turn}

x + 232° = 360°

x = 360° - 232°

x = 128°

8 0
3 years ago
Read 2 more answers
The base of a triangular pyramid has an area of 20 square feet. The height of the pyramid is 36 feet. The volume of the pyramid
fenix001 [56]

Answer:

so what's the question? i'm a bit confused..

Step-by-step explanation:

7 0
2 years ago
Which table shows a proportional relationship?
lord [1]
To figure this out, always divide y by x in each table. All of the values have to be equal or the table isn’t proportional.

In this case, the last choice is proportional.
7 0
3 years ago
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