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Alika [10]
2 years ago
9

What is the average rate of change for this quadratic function for the interval

Mathematics
1 answer:
Romashka [77]2 years ago
7 0

Answer:

x 2 − 8 x + 15

Step-by-step explanation:

( x − 3 ) ( x− 5)

 Expand  ( x − 3 ) ( x − 5 )

using the FOIL Method.

x ⋅ x + x ⋅ − 5 − 3 x − 3 ⋅ − 5

Simplify and combine like terms.

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daser333 [38]
The answer is option D
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3 years ago
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A central angel in this diagram is
Paha777 [63]

Answer:

it looks like an acute angle

4 0
3 years ago
Math Geniuses, here's a question for ya! <br><br> What is 15.506 rounded to the nearest hundredth?
FinnZ [79.3K]

Answer:

15.51

Step-by-step explanation:

tens  ones. tenths  hundredths  thousands

1               5. 5               0                6

To round to the nearest hundredth, we look at the thousandths place

Since is it 5 or higher(6) we round the hundredths place up

15.506 becomes 15.51

3 0
4 years ago
John is organizing a local event. He expects the approximate attendance for the event to be modeled by the function a(t) = -16t2
german

Answer:

the duration of this event is 4 hours

Step-by-step explanation:

This function is a quadratic one

let Δ be the dicriminant :

  • a = -16
  • b = 48
  • c= 64
  • Δ = 48²-4*(-16)*64 = 6400

so there are two values that satisfy -16t²+48t+64 = 0  x and y

  • x= (-48+80)/-16*2 = -1
  • y= (-48-80)/-16*2= 4

x<0 so w won't take it since time is a positive value here

so t = y = 4h

8 0
3 years ago
A jewelry store has 311.75 ounces of 14-carat gold in stock.
WARRIOR [948]

Answer:

\boxed{\text{(a) 86 necklaces; (b) \$2220}}

Step-by-step explanation:

(a) Number of necklaces

3⁵/₈ = 3.625

\text{No. of necklaces} = 311.75\text{ oz} \times \dfrac{\text{1 necklace}}{3.625\text{ oz}} = \textbf{ 86 necklaces}\\\\\text{You can make } \boxed{\textbf{86 necklaces}} \text{ from 311.75 oz of 14K gold}

(b) Value of gold in each necklace

There are 3.625 oz of 14K gold in each necklace. Pure gold is 24K.

\text{Mass of pure gold} = \text{3.625 oz} \times \dfrac{\text{14K}}{\text{24K}} = \text{2.1146 oz}

Pure 24K gold is worth $1050/oz.

\text{Value of pure gold} = \text{2.1146 oz} \times \dfrac{\text{\$1050}}{\text{1 oz}} = \textbf{\$2220}\\\\\text{The value of the gold in each necklace is } \boxed{\textbf{\$2220}}

4 0
3 years ago
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