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3 years ago

PLEASE HELP WITH MATH QUESTION!! EXPLANATION NEEDED TOO!

Mathematics

1 answer:

Dovator [93]3 years ago

8 0

Answer:

Matt should have factored out the leading coefficient 2 on the second step before completing the square

Step-by-step explanation:

To complete the square, you must first factor the leading coefficient from the first two terms.

y = 2x² − 10x − 4

y = 2 (x² − 5x) − 4

y = 2 (x² − 5x + 25/4 − 25/4) − 4

y = 2 (x² − 5x + 25/4) − 25/2 − 4

y = 2 (x − 5/2)² − 33/4

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Taya2010 [7]

The speed of the current in a river is 6 miles per hour

Solution:

Given that,

Speed of boat in still water = 20 miles per hour

Time taken = 3 hours

Distance downstream = 78 miles

To find: Speed of current

If the speed of a boat in still water is u km/hr and the speed of the stream is v km/hr, then:

Speed downstream = (u + v) km/hr

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Therefore, speed downstream is given as:

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Step-by-step explanation:

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Read 2 more answers

Find the size of angle YZX

Tasya [4]

Answer:

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Step-by-step explanation:

The diagram shows right triangle with

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