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Anastasy [175]
2 years ago
9

Given the function h(a) = -x^2+ 7x + 14, determine the average rate of change

Mathematics
1 answer:
Yakvenalex [24]2 years ago
6 0

Answer:

- 2

Step-by-step explanation:

The average rate of change of h(x) in the closed interval [a, b ] is

\frac{f(b)-f(a)}{b-a}

Here [a, b ] = [1, 8 ], thus

f(b) = f(8) = - 8² + 7(8) + 14 = - 64 + 56 + 14 = 6

f(a) = f(1) = - 1² + 7(1) + 14 = - 1 + 7 + 14 = 20

average rate of change = \frac{6-20}{8-1} = \frac{-14}{7} = - 2

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The distance between New Orleans and Houston is 353 miles. At 12:20 PM, a bus
Dima020 [189]

Answer:

3:25 pm

Step-by-step explanation:

The distance between New Orleans and Houston is : 353 miles

Departure time of the bus : 12:20 pm

Speed of the bus: 60 mph

After 45 minutes, the bus will be at a distance of : 45/60 * 60 = 45 miles

Distance remaining to cover = 353-45 = 308 miles

Speed of the motorcycle = 72 mph

Relative speed = 60 + 72 = 132 mph

Time the two will meet = 308 / 132 =  7/3 hrs

7/3 hrs = 2 hrs  20 minutes

Time the two will meet is ;

12:20 pm + 45 minutes + 2 hrs 20 minutes

= 3:25 pm

8 0
3 years ago
Vera has $10$ white socks, $10$ black socks, $10$ brown socks, $10$ blue socks, and $10$ red socks. How many socks (at a minimum
UNO [17]

The minimum number of socks that she needs to get such that a pair is always formed is 5.

<h3></h3><h3>How many socks must she get to be ensured of having a pair?</h3>

We know that she has:

  • 10 white socks.
  • 10 black socks
  • 10 brown socks
  • 10 blue socks.

First, we need to compute the maximum number of socks she needs to take in such a case that no pair is formed.

That will be 4, and represents the case where:

1 white sock, 1 black sock, 1 brown sock, and 1 blue sock are drawn. At that point, no pairs are formed.

Now, if she draws another sock, a pair will always be formed.

From this, we conclude that if she draws 5 socks, always at least one pair will be formed.

If you want to learn more about combinations, you can read:

brainly.com/question/11732255

3 0
1 year ago
MARK YOU BRAILIST PLEASE ANSWER CORRECTLY AND SHOW YOUR WORK Which process was used to obtain the equation shown in Step 2?
KonstantinChe [14]

Answer:

C

Step-by-step explanation:

Multiply by 12 on both sides.

Start with step one

y/3 - 1/4 = 5              Multiply both sides by 12

12(y/3 - 1/4) = 5*12

12*y/3 - 12 * 1/4 = 60

3 goes into 12 four times

4 goes into 12 three times. In both cases you are cancelling.

4y - 3 = 60

6 0
2 years ago
Evaluate each expression if A=Z, B=5, X=4, and N=10. what is the answer for [a+8 (b-2)]^2÷4
nalin [4]

Hi!

<h3>Put in the values. </h3>

[z+8(5-2)]^2/4

<h3>Now use PEMDAS to solve. </h3>
  • Parentheses - Subtraction

[z+8*3]^2/4

  • Parentheses - Multiplication

[z+24]^2/4

  • Exponents

z+576/4

  • Division

<u>z+144</u>

<h2>When you evaluate [a+8 (b-2)]^2÷4, you get z + 144</h2>

Hope this helps! :)

-Peredhel

8 0
3 years ago
Mary has five-eighths of the total of pencils her and her sister own. Together, they have 96 pencils. How many pencils does Mary
olga55 [171]
60 pencils. It’s a ratio. 60/96 can be simplified down to 5/8
5 0
3 years ago
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