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3 years ago

Solve the quadratic equation y^2 −10y+21=0 y=?

Mathematics

1 answer:

Firdavs [7]3 years ago

8 0

Answer: y = 3 or y=7

Step-by-step explanation:

$y^{2} -10y+21$

what 2 factors of 21 can equal 10 when added together (1*21- no 3*7- yes)

Factor

$(y-3)(y-7)$

y-3=0

y=3

or y-7=0

y=7

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Need answer asap!!!!!<br><br> how would i solve this?

lesya [120]

The height of the building to the nearest tenth of a meter is; 13 m

<h3>How to make use of Cosine Rule?</h3>

The slant line from the top of Trevor's head to the base of the building is gotten from Pythagoras theorem;

15/x = sin 36°

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x = 25.52 m

Angle between that slant line and base of building is;

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Remaining angle of the bigger triangle is;

180 - (36 + 83.88) = 60.12°

Thus, if the height of the building is h, then;

h/sin 36 = 25.52/sin 60.12

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Read more about Cosine Rule at; brainly.com/question/4372174

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2 years ago

A computer chip has the dimensions 8mm x 8mm but the scale is drawn with the ...

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3 years ago

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Studentka2010 [4]

Answer:

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svetoff [14.1K]

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julia-pushkina [17]

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