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3 years ago

Dolly's best ski time is 76 seconds this time is 1 1/3 times the best time score by Andrew what is Andrews best

Mathematics

1 answer:

RUDIKE [14]2 years ago

7 0

Answer:

answer is here

Step-by-step explanation:

https://www.mathpapa.com/algebra-calculator.html

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If x=(10-3i) and y=(3-10i), then xy=? and x/y=?

Solnce55 [7]

Answer:

$xy=-109i$

$\frac{x}{y}=\frac{60}{109}+\frac{91}{109}i$

Step-by-step explanation:

$xy=(10-3i)(3-10i)$

To compute x times y must use foil on the right hand side.

First: $10(3)=30$

Outer: $10(-10i)=-100i$

Inner: $-3i(3)=-9i$

Last: $-3i(-10i)=30i^2=-30$

------------------------------------Add like terms:

$-109i$

----------------

$\frac{x}{y}$

$\frac{10-3i}{3-10i}$

Multiply top and bottom by bottom's conjugate:

$\frac{(10-3i)(3+10i)}{(3-10i)(3+10i)}$

Foil the top and just do first and last of Foil for the bottom since the bottom contains multiplying conjugates:

$\frac{30+100i-9i-30i^2}{9-100i^2}$

Replace $i^2$ with -1:

$\frac{30+91i+30}{9+100}$

$\frac{60+91i}{109}$

$\frac{60}{109}+\frac{91}{109}i$

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3 years ago

AT YOUR NEW JOB AT THE COFFEE SHOP, YOU SOLD 42 LARGE COFFEES AND 54 SMALL COFFEES WHAT WAS THE RATIO OF LARGE TO SMALL COFFEES

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Answer:

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Step-by-step explanation:

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2 years ago

What divided by 14 will equal 29

Paladinen [302]

X/14=29
x=14*29
x=406

Hope this helps :)

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3 years ago

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Select the correct answer. What is the area of the cross section that is parallel to side PQRS in this rectangular box? A. 12 sq

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Answer:

12 square units.

Step-by-step explanation:

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2 years ago

How should the decimal point in 52.48 be moved to determine the product 52.48×105 ?

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Step-by-step explanation:

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3 years ago

Dolly's best ski time is 76 seconds this time is 1 1/3 times the best time score by Andrew what is Andrews best ​

Dolly's best ski time is 76 seconds this time is 1 1/3 times the best time score by Andrew what is Andrews best