3 years ago

Factor the trinomial (

Mathematics

1 answer:

Snezhnost [94]3 years ago

3 0

Answer:

Prime.

Step-by-step explanation:

A^2+4a+12

Not factorable.

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Please help me (math) Is it A and B or just A? Im 99% sure it is not C :)

PSYCHO15rus [73]

I’m pretty sure it’s a

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3 years ago

In triangle ABC segment DE is parallel to the side AC . (The endpoints of segment DE lie on the sides AB and BC respectively). F

Sophie [7]

Answer:

The length of DE is 14 cm.

Step-by-step explanation:

Given in triangle ABC segment DE is parallel to the side AC . (The endpoints of segment DE lie on the sides AB and BC respectively). we have to find the length of DE.

Given lengths are AC=20cm, AB=17cm, and BD=11.9cm

In ΔBDE and ΔBAC

∠BDE=∠BAC (∵Corresponding angles)

∠BED=∠BCA (∵Corresponding angles)

By AA similarity rule, ΔBDE~ΔBAC

∴their corresponding sides are in proportion

⇒ $\frac{BE}{BC}=\frac{BD}{BA}=\frac{DE}{AC}$

⇒ $\frac{BD}{BA}=\frac{DE}{AC}$

⇒ $\frac{11.9}{17}=\frac{DE}{20}$

⇒ $DE=\frac{20\times 11.9}{17}=14cm$

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3 years ago

Evaluate 2 sin 60° + tan 45° + cos²60°

DerKrebs [107]

Answer:

1.25+√3 or 2.9821 to the nearest ten thousandth.

Step-by-step explanation:

sin 60 = √3/2, tan 45 = 1 and cos^2 60 = (1/2)^2 = 1/4

So we get 2 *√3/2 + 1 + 1/4

= √3 + 1.25

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Then answer you seek is 133.

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2 Points What is the slope of the line described by the equation below? y=-x+8

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Answer: -1

Step-by-step explanation:

slope formula: y=mx+b

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