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2 years ago

Simplify the expression. -4i(2+3i)

Mathematics

2 answers:

vovangra [49]2 years ago

8 0

Answer:

12−8i

Step-by-step explanation:

-(-4 *3+4*2i)

-4*3=12

4*2=8

=12-8i

oee [108]2 years ago

5 0

Answer:

-8i + 12

Step-by-step explanation:

-4i(2 + 3i) = -8i - $12i^{2}$ = -8i - 12 * (-1) = -8i + 12

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a stack of 500 sheets of paper is 1.875 inches tall. Diego guess that each piece of paper and 0.015 inches thick. Explain how yo

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3 years ago

At a blind taste competition a contestant is offered 3 cups of each of the 3 samples of tea in a random arrangement of 9 marked

solmaris [256]

Answer:

$\frac{5}{14}$

Step-by-step explanation:

Data provided in the question:

Number of cups of tea offered = 3

Number of cups marked = 9

Number of cups tasted by each = 4

Now,

The probability that a contestant does not taste all of the samples

= contestant tastes only 2 samples of tea

= $\frac{C_3^2\timesC_6^4}{C_9^4}$

C₆⁴ = number of ways to choose 4 cups out of 6 cups of two samples

C₃² = number of ways to choose which 2 samples will be tasted

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= $\frac{5}{14}$

Hence,

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2 years ago