3 years ago

What's (6+5i)(6-5i) using the foil method

Mathematics

1 answer:

I am Lyosha [343]3 years ago

8 0

Answer:

Step-by-step explanation:

$Remember:\\(a+b)(a-b)=a^2-b^2\\\\(6+5i)(6-5i)=6^2-(5i)^2=36-(-1)*25=36+25=61\\$

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Assoli18 [71]

Answer:

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Step-by-step explanation:

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3 years ago

What integer increased by - 12 is 28?

guajiro [1.7K]

Answer:

Step-by-step explanation:

Let n represent the integer. Then the increase can be written as ...

n + (-12) = 28

We can add 12 to both sides of this equation:

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n = 40

The integer is 40.

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3 years ago

The price of an Ice cream cone is $3.25, but it cost $3.51 with tax. What is the sales tax rate?

Mekhanik [1.2K]

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3 years ago

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Line GJ is tangent to point A at point G.<br><br> If AI = 5 and IF = 12, find A F.

Drupady [299]

I believe this is how you do it...
AI=5, 5 squared=25
IF=12, 12 squared=144
144+25 (only because line A F is bigger than AI or IF does it add)
A F=169

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3 years ago

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A car traveling on the taconic parkway travels 84 mike in two hours what is the cars speed (a special type of rate) in miles per

avanturin [10]

we know that

the speed's formula is equal to

$speed=distance/time$

in this problem we have

$distance=84\ miles\\time=2\ hours$

Substitute the values in the formula

$speed=84/2$

$speed=42\frac{miles}{hour}$

therefore

<u>the answer is</u>

$42\frac{miles}{hour}$

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3 years ago