2 years ago

Multiply. 9i (5-2i)=

Mathematics

1 answer:

Vilka [71]2 years ago

6 0

Answer:

The answer is 45i + 18

since i *i=-1

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What is x to the power of 3 divided by x to the power of -5

Veseljchak [2.6K]

X to the power of 8
When dividing powers, you subtract the "small numbers". When multiplying, you add them. 3-(-5) = 8

Hope it helps!

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3 years ago

Ivenika [448]

Here’s the full solution:

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From the beginning of the day the temperature rose 15° so that by 4 pm it was 87°. What was the temperature at the start of the

Stolb23 [73]

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the temperature rose 15, and ended as 87, so the temp was 72 before it rose

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2 years ago

The surface area of a triangular pyramid is 80 m2. If the pyramid is enlarged by a scale factor of 2, what is the surface area o

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2 years ago

Read 2 more answers

PLS ANSWER QUICK! Thanks!

ziro4ka [17]

Answer:

The correct answer would be $a=\sqrt{c^2-b^2}$

Step-by-step explanation:

given $a^2+b^2=c^2$ we want to solve for a

How?

We can do this by using basic algebra ( isolating the variable (a ))

Step 1 subtract $b^2$ from each side

$a^2+b^2-b^2=a^2\\c^2-b^2=c^2-b^2$

now we have $a^2=c^2-b^2$

step 2 take the square root of each side

$\sqrt{a^2} =a\\\sqrt{c^2-b^2} =\sqrt{c^2-b^2}$

we're left with $a=\sqrt{c^2-b^2}$

Hence your answer is A

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2 years ago