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Vitek1552 [10]
3 years ago
13

Evaluate the function. f(x) = -2x2 + 8x – 10 Find f(-4)

Mathematics
2 answers:
Andre45 [30]3 years ago
4 0

Answer:

f(-4)=-2(-4)²+8(-4)-10=-2×16-32-10=-74

LekaFEV [45]3 years ago
3 0

Step-by-step explanation:

Given

f(x) = - 2x² + 8x - 10

f(-4) = - 2 * (-4)² + 8 * ( -4 ) - 10

= - 32 - 32 - 10

= - 74

Hope it will help :)

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Round your answer to one decimal digit. The volume of a cylinder is 1 800 cm3. If the height of the cylinder is 40 cm then the d
Lunna [17]

Answer:

7.57 cm

Step-by-step explanation:

Volume of a cylinder = πr²h

π = 3.14

r= radius

h = height

1,800 = 3.14 x r² x 40

r² = 1800 /(3.14 x 40)

r² = 14.33121

√14.33121 = r

r = 3.785658 cm

the diameter is the straight line that passes through the centre of a circle and touches the two edges of the circle.

A radius is half of the diameter

Diameter = 2 x 3.785658 cm = 7.57cm

6 0
3 years ago
What are the answers and why?
vampirchik [111]

Answer:

\boxed{\text{(v) and (viii)}}

Step-by-step explanation:

The three step test for continuity states that a function ƒ(x) is continuous at a point x = a if three conditions are satisfied:

  • f(a) is defined.
  • The limit of ƒ(x) as x approaches a exists.
  • The limit of ƒ(x) as x approaches a is equal to f(a).

(i) Left-hand limit = right-hand limit.

Pass. The limit from either side is 8.

(ii) Left-hand limit = limit.  

Pass. If the limits from either direction exist, the limit exists.

(iii) Limit as x ⟶ ∞ is not part of the three-step test.

(iv) Limit as x ⟶ 1 exists. Pass.

(v)  f(1) is defined.

FAIL. f(1) is not defined.

(vi) Limit as x ⟶ ∞ is not part of the three-step test.

(vii) Passing the three-step test is not a step in the test.

(viii) The limit as x ⟶ 1 does not equal f(1).

FAIL. f(1) is undefined.

The steps in the three-step test for which the function fails are \boxed{\textbf{(v) and (viii)}}.

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4 years ago
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Marta_Voda [28]
D i think because it’s talking about the angling
7 0
3 years ago
Read 2 more answers
Please help I’ll give brainiest!!
Charra [1.4K]

Answer:

f(4) = 0

Step-by-step explanation:

f(4) means what is the value of y when x = 4

Now x = 4 is on the x- axis, where y = 0, thus

f(4) = 0

5 0
3 years ago
The ___ of an event is the ratio of occurrences to trials.
Yuki888 [10]

Answer:

Experimental probability

Your Welcome

5 0
3 years ago
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