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3 years ago

13

Express x²-8x+5 in the form (x-a)²-b where a and b are integers

1 answer:

Elis [28]3 years ago

6 0

x^2-8x+16-11= (x-4)^2-11

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A textbook costs $58 and sells for $70. Find the rate of markup based on the selling price.

notka56 [123]

58r=70

r=35/29

r≈1.2069

So the rate was about 1.21 or if you prefer about 20.7%

7 0

3 years ago

In Mr. Diaz’s class, 20% of the students received a grade of “A” on their report cards. There are 25 students in

Simora [160]

25/x=100/20 criss cross and u will get 500/100=5 then 5 students resivs A.

7 0

4 years ago

Read 2 more answers

Wich is corect btw this is homework

Amanda [17]

Answer:68 with the little two

Step-by-step explanation:

5 0

3 years ago

310=-6.2f<br> f=??? so confused

Mariulka [41]

F=-50 as multiplying it by -6.2 would give you a positive 310

6 0

3 years ago

A day can be evenly divided into 86,400 periods of 1 second; 43,200 periods of each 2 seconds; or in many other ways. In total,

Leni [432]

Answer:

96 ways

Step-by-step explanation:

Given

$Day = 86400\ seconds$

Required

Ways to divide it into period of seconds

What this question implies is to determine the total number of factors of 86400

To start with, we determine the prime factorization of 86400

To do this, we continually divide 86400 by 2; when it can not be further divided, we divide by 3, then 7, then 11...

$86400/2 = 43200$

$43200/2=21600$

$21600/2=10800$

$10800/2=5400$

$5400/2= 2700$

$2700/2 = 1350$

$1350/2=675$

$675/3=225$

$225/3=75$

$75/3=25$

$25/5=5$

$5/5 = 1$

This implies that:

$86400 = 2^7 * 3^3 * 5^2$

The number of factors d is the solved by:

$d = (a+1)*(b+1) *(c+1)$

Where

$n = 2^a * 3^b * 5^c$

By comparison:

$a = 7$

$b = 3$

$c=2$

So:

$d = (7+1)*(3+1) *(2+1)$

$d = 8*4 *3$

$d = 96$

<em>Hence, there are 96 total ways</em>

7 0

3 years ago