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My name is Ann [436]
3 years ago
9

If i = −1 and a and b are non-zero real numbers, what is 1a+bi ?

Mathematics
1 answer:
MariettaO [177]3 years ago
6 0
The i you normally think of (the one = to sqrt(-1) is not the same i they are using here. They are using this i the same way you would use x = - 1 in any normal equation or relation.

1a + b(-1)
a - b is your answer <<<< answer
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Sarah cut 2 yards of ribbon from a spool. How much did she cut in inches
Nesterboy [21]

1 yard = 3 feet

2 yards = 2•3feet = 6 feet

1 foot = 12 inches

6 feet = 12 • 6 = 72 inches

If you need a better explanation just ask in the comments.

Happy to help! Please mark as BRAINLIEST! Thanks

5 0
3 years ago
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The half-life of Einsteinium 253 is 20.5 days. If you start with 5g
tatiyna

Answer:

1.753 g

Step-by-step explanation:

Half life of Einsteinium = 20.5 days

Time elapsed = 31 days

Initial quantity of the substance = 5g

The formula to apply is;

N( t )=N_o( \frac{1}{2}  )^{\frac{t}{t0.5} }

Where

N(t)=quantity of a substance remaining

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t= time elapsed=31 days

t1/2 = half life of the substance= 20.5 days

N(t)=5 * {1/2} ^ {31/20.5}

N{t} = 5 * {0.5}^1.5

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7 0
3 years ago
Find the measure of the angle x+77
mrs_skeptik [129]
Pretty sure the answer is 40. If memory serves correctly you set them equal to each other
7 0
4 years ago
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Find the greatest number that divides 56 and 84 exactly​
kvv77 [185]

Answer:

28

Step-by-step explanation:

Find the gcf

4 0
3 years ago
A cage holds two litter of rats. One litter comprises one female and five males. The other litter comprises seven females and tw
timurjin [86]

Answer:

The probability that the two rats are from the first litter is 14.28%, and the probability that the two rats are from the second litter is 34.28%.

Step-by-step explanation:

Since a cage holds two litter of rats, and one litter comprises one female and five males, while the other litter comprises seven females and two males, and a random selection of two rats is done, to find the probability that the two rats are from the same litter the following calculation must be performed:

6/15 x 5/14 = 0.1428

9/15 x 8/14 = 0.3428

Therefore, the probability that the two rats are from the first litter is 14.28%, and the probability that the two rats are from the second litter is 34.28%.

4 0
3 years ago
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