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2 years ago

(2x^2)+7x+5=0, I do not understand the -5/2 part why is it negative please elaborate

Mathematics

1 answer:

mamaluj [8]2 years ago

5 0

Answer:

It is one of the answers of the quadratic expression.

Step-by-step explanation:

There are two answers (because it has exponents, you can have two answers)

-1, -2.5 or -5/2

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A chord is 10cm from the centre of a circle of radius 15cm. Find the length of the chord.

almond37 [142]

Answer: 21.44 cm

Step-by-step explanation:

Given

Radius r=15 cm

distance of chord from the center is 10 cm

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Applying Pythagoras

$\Rightarrow AO^2=OB^2+AB^2\\\Rightarrow AB^2=15^2-10^2\\\Rightarrow AB^2=225-100=115\\\Rightarrow AB=\sqrt{115}=10.72\ cm$

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3 years ago

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3 years ago

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3 years ago

Read 2 more answers

Out of the 150 students at a summer camp, 72 signed up for canoeing. there were 23 students who signed up for trekking, and 13 o

True [87]

Answer:

Approximately 45% students signed up for neither canoeing or trekking.

Step-by-step explanation:

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But there are 13 students who signed up canoeing and also for trekking.

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