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Aleks04 [339]
3 years ago
12

There are 9 balls in a hat. The balls are numbered 1-9. You need to choose 3 of the balls. How many possible combinations are th

ere?
Mathematics
1 answer:
andre [41]3 years ago
7 0
There are 27 different combinations 9×3=27
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PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!<br><br> What is [100(−4)^n-1} equal to?
nikklg [1K]

Answer:   -5100

<u>Step-by-step explanation:</u>

\sum^4_1[100(-4)^{n-1}]\qquad \rightarrow \qquad a_1=100\ \text{and r = -4}\\\\\\S_n=\dfrac{a_1(1-r^n)}{1-r}\\\\\\\\S_4=\dfrac{100(1-(-4)^4)}{1-(-4)}\\\\\\.\quad=\dfrac{100(1-256)}{1+4}\\\\\\.\quad=\dfrac{100(-255)}{5}\\\\.\quad=20(-255)\\\\.\quad=-5100\\

3 0
3 years ago
I need help on this question please help me
Travka [436]

The expression that shows the best use of the associative and commutative properties is [\frac{3}{4}+(-\frac{2}{4})]+[9 +2+(-5)]. The correct option is C. [\frac{3}{4}+(-\frac{2}{4})]+[9 +2+(-5)]

<h3>Associative and Commutative properties </h3>

From the question, we are to determine the expression that shows the best use of the associative and commutative properties

The given expression is

\frac{3}{4}-5+9 -\frac{2}{4}+2

To easier simplify the expression, we can group the fractions together and group the whole numbers together

That is,

[\frac{3}{4}+(-\frac{2}{4})]+[9 +2+(-5)]

Hence, the expression that shows the best use of the associative and commutative properties is [\frac{3}{4}+(-\frac{2}{4})]+[9 +2+(-5)]. The correct option is C. [\frac{3}{4}+(-\frac{2}{4})]+[9 +2+(-5)]

Learn more on Associative and commutative properties here: brainly.com/question/491384

#SPJ1

4 0
2 years ago
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