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stich3 [128]
3 years ago
9

Pls help asap WILL GIVE BRAINLIST

Mathematics
1 answer:
Greeley [361]3 years ago
3 0

Answer:

answer is c

Step-by-step explanation:

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Rewrite the equation by completing the square. f (x) = x^2 + 20x - 86
9966 [12]

Answer:

f(x) = (x+10)^2 - 86

Step-by-step explanation:

  1. f(x) = x^2 + 20x - 86
  2. f(x) = x^2 + 20x + 100 - 86 (because (20/2)^2 = 100)
  3. f(x) = (x+10)^2 - 86

Completing the square means you do (b/2)^2 where b is: a^2x + bx + c.

7 0
3 years ago
Determine whether the following statement is true or false. The graph of f(x)=(x+7)2+4 has its vertex at ​(7​,4​).
erastova [34]

Answer:

False.

The vertex is at (-7, 4).

Step-by-step explanation:

f(x) = (x + 7)^2 + 4

The minimum value of (x + 7)^2 = 0 (as it's a perfect square) , so minimum of f(x) is 4 when x = -7.

6 0
3 years ago
$64 jacket 20% discount
tatiyna
$64 jacket with a 20% discount:

First, we need to change the percentage into a number that we can calculate with. Take the percentage (20%) and divide it by 100(%), since the denominator should always be 100 when changing a percentage into a decimal. 
\frac{20}{100} = 0.20

Now that we have a number we can calculate with, we need to know how much money we are going to save from the discount. Take the new decimal we just got, and multiply it by the cost of the jacket, which is $64. 
0.20 × 64 = 12.80

Knowing that we can save $12.40 on the jacket, we can now subtract the price of the jacket from the discount we get on it. 
64 - 12.80 = 51.20

You will pay a total of $51.20 on the jacket with the discount added.

3 0
4 years ago
What’s the inverse of the function f(x)=7x+2
lapo4ka [179]
The answer is f(x)=(x-2)/7
to find the inverse of a function, swap x and y and then find y. hope this helps!
6 0
3 years ago
The number of visits to public libraries increased from 1.5 billion in 1991 to 1.7 billion in 1996. Find the average rate of cha
nexus9112 [7]

The average rate of change between 1991 and 1996 is 40 million

<h3>How to determine the average rate of change between 1991 and 1996?</h3>

The given parameters are:

Population in 1991 = 1.5 billion

Population in 1996 = 1.7 billion

The average rate of change between 1991 and 1996 is calculated as:

Rate = (1.7 billion -1.5 billion)/(1996 - 1991)

Evaluate

Rate = 40 million

Hence, the average rate of change between 1991 and 1996 is 40 million

Read more about average rate of change at

brainly.com/question/8728504

#SPJ1

6 0
2 years ago
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