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3 years ago

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Mathematics

1 answer:

Kryger [21]3 years ago

4 0

The answer to this would be 2

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F(x) = 3x² + 9x – 16 Find f(-8)

Nezavi [6.7K]

Answer: 104

Step-by-step explanation:

$f(-8)$ represents $f(x)$ evaluated at $x=-8$ .

$f(-8)=3(-8)^2 +9(-8)-16\\\\=192-72-16\\\\=120-16\\\\=104$

7 0

1 year ago

What is the length of AC? 3 ft 4 ft 9 ft 18 ft

iragen [17]

Answer: The length of AC is 18 ft.

Step-by-step explanation:

By the given diagram,

AM = MB and CN = NB

M and N are the mid points of the sides AB and CB respectively,

Thus, by the mid point theorem,

MN ║ AC,

By the alternative interior angle theorem,

∠BMN ≅ ∠BAC

∠BNM ≅ ∠BCA

Thus, by AA similarity postulate,

ΔBMN ≅ ΔBAC

By the property of similar triangles,

$\frac{BM}{BA}=\frac{MN}{AC}$

$\frac{BM}{BM+MA}=\frac{MN}{AC}$

$\frac{4}{4+4}=\frac{9}{AC}$

$\frac{4}{8}=\frac{9}{AC}$

$4AC=72\implies AC = 18\text{ ft}$

Thus, The length of AC is 18 ft.

5 0

3 years ago

Read 2 more answers

Grant plans to evaporate

ale4655 [162]

What do you mean by this? is there supposed to be a link attached?

6 0

3 years ago

Which are correct represention of the inequality-3(2x-5)<5(2-x)

Triss [41]

° -3 × (2×-5)-(5×[2-x])<0

° (0-(3×[2x-5]))-5×(2-x)<0

° (0-3×[2x-5])-5×(2-x)<0

° 5- x < 0

° x-5 > 0

So, that means your answer is--> "x>5"

4 0

3 years ago

Read 2 more answers

Sin²a+sin²a.tan²a=tan²a

wolverine [178]

Answer:

# sin²A (1+tan²A)

# sin²A(sec²A)

# sin²A(1/cos²A)

# sin²A/cos²A=tan²A

6 0

3 years ago