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3 years ago

PLEASE HELP Given the function f(x) = 3x2 – 4

Mathematics

1 answer:

Zarrin [17]3 years ago

7 0

Answer:

Step-by-step explanation:

Rate of change is the slope of the tangent which will be the derivative of the function

if f(x) = 3x² - 4

f'(x) = 6x

as the derivative is linear, the average rate of change will occur at the midpoint of the interval

f'(2.5) = 6(2.5) = 15

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A. $40 is the set price per month and $.035 is the changing rate per minute. If t represents the minutes you use the phone, then you have to multiple that amount by $.035

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3 years ago

A library ordered 956 new books. They ordered 12 times as many mystery books as romance. They ordered 52 more science fiction bo

Nataly_w [17]

Answer:

Romance books ordered = 65

Mystery books ordered = 775

Science Fiction book Ordered ≈ 116

Step-by-step explanation:

Total number of books ordered in the library = 956

Let us assume the number of romance books ordered = m

⇒Number of mystery books ordered = 12 x (Number of romance books)

= 12 x(m) = 12 m

Also,number of science books ordered = 52 +(Number of romance books)

= 52 + m

Now, according to the question:

Number of { romance books + mystery books + science books} = 956

or, m + ( 12 m ) + (52 + m) = 956

or, 14 m = 956 - 52

or, 14 m = 904

⇒ m = 904/ 14 = 64.6

So, the number of romance books ordered = 64.6 ≈ 65

Number of mystery books ordered = 12 m = 12 x 64.5 = 775

Number of science fiction book ordered = = 52 + m = 116.6 ≈ 116

7 0

3 years ago

PLSSSSS HELPPPPPP MEEEE!!!!! I WILL MARK U!!!!!!!

andreyandreev [35.5K]

Substitute the value of y in the equation as -1,

(-1)^2-31(-1)-17 = 1+31-17 = 15

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3 years ago

RS= 4y+2, ST = 3y+8, and RT = 38 what is the value of y

emmainna [20.7K]

Answer:

y = 4

Step-by-step explanation:

Given that,

RS= 4y+2, ST = 3y+8, and RT = 38

We need to find the value of y.

As,

RT = RS+ST

Put all the values,

38 = 4y+2+3y+8

38-2-8 = 4y+3y

28 = 7y

y = 4

So, the value of y is equal to 4.

7 0

3 years ago

8a + 12s=124<br> 16a +23s=243

Svetach [21]

Answer:

1: a=31/2 - 3s/2 2: a=243/16 - 23s/16

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers