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MArishka [77]
4 years ago
9

There are 7 rows of 9 people . how many people in all ?

Mathematics
1 answer:
Vesnalui [34]4 years ago
6 0

Answer:

Step-by-step explanation:

(7 rows)(9 people per row) = 63 people total

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A professor must randomly select 4 students to participate in a mock debate.
Alexus [3.1K]

Answer:

Step-by-step explanation:

We can use combinations

20 choose 4:

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= (20*19*18*17)/4!

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3 0
4 years ago
Step by step explanation pls (30 points!)
GarryVolchara [31]

Answer:

40t^4

Step-by-step explanation:

I'm guessing you have to simplify the expression so...

first, on the top of the fraction there is a 5^2 which is just 25. 25*25 = 625, so the top of the fraction bar changes to 625 * t^8

The denominator is 10^3 = 1000. this changes it to 1000 * t^4

The hard part now is to simplify this. t^8 is just t*t*t*t*t*t*t*t. similarly t^4 is just t*t*t*t

Since there are 4 t's in both the numerator and denominator, this cancels it out and changes this to

\frac{625  \cdot t^4}{1000} which simplifies to \frac{5 \cdot t^4}{8}.

To get rid of the denominator, we multiply 8/8 to the fraction to get:

8(5 \cdot t^4), which if we distribute the 8 we get: 40t^4. Which is our answer!

Hope this helps!

4 0
3 years ago
PLEASE HELP Evaluate the limit, if it exists. Show work. lim_(x->5)((x^(2)-3x-10)/(2x-10))
gayaneshka [121]

Answer:

lim \: x \: —>5 \:  \:  \frac{ {x}^{2} - 3x - 10 }{2x - 10}  \\  \\ lim \: x \: —>5 \:  \:  \:  \frac{(x - 5)(x + 2)}{2(x - 5)}  \\  \\ lim \: x \: —>5 \:  \:  \frac{(x + 2)}{2}   =  \frac{5 + 2}{2}  =  \frac{7}{2}  \\  \\  \\  =  \frac{7}{2}  = 3.5

I hope I helped you^_^

3 0
3 years ago
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Answer: 1.75

Step-by-step explanation:

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3 years ago
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Arte-miy333 [17]

92287262=6282992=72727275=2092÷6&^×=

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4 years ago
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