Can anyone please teach me how to work out x2-8x+19?

Answers

Answer 1

Answer: $x^2-8x+19=\nx^2-8x+16+3=\n(x-4)^2+3\n\n(x-4)^2+3=0\n(x-4)^2=-3\nx\in \emptyset$

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For which value or values are the expressions 15k+9 and 3(2k+3)+9k

Answers

remember you can do anthing to an equaiton as long as you do it to both sides

I think you are missing a relation symbol at the end
it could be an equals though (just my guess)

For which value or values are the expressions 15k+9 and 3(2k+3)+9k equal

15k+9=3(2k+3)+9k
use distributive prpoerty which says
a(b+c)=ab+ac so
3(2k+3)=6k+9

now we have
15k+9=6k+9+9k
add like terms
15k+9=15k+9
subtract 9
15k=15k
divide 15
k=k
since this is a true statement, any number will work for k

k=all real numbers

What is the volume, to the nearest whole cubic inch, of a cylinder with a height of 10 inches and a radius of 8 inches? Use PI=3.14 and round your answer to the whole number.

Answers

V= pi *r ^2 *h for a cylinder
V= 3.14* 10* (8*8)
V=3.14*640=2009.60
if you rounded is 2010 in^3

Answer:

2010 in³

Step-by-step explanation:

What is the halving and doubling strategy

Answers

halving-reduce by half or think what is fifty% of the number or divide by two
doubling-add the number you got to the same number or multiply by two

Halving Ex.:6/2=3

Doubling ex.: 9+9=18 or 6*2=12

Which Function does NOT have an x-intercept?A.y=1/2x-7 B.y=-x^2+2x+5 C.y=-1/3x-5 D.y=x^2-2x+5

Answers

x intercept is when the line crosses the x axis aka when y=0

see if you can solve for x if you set y=0
if you get a false statement, then there is no yint
we can see that A and C have xints
test B and D

B.
0=-x^2+2x+5
if we put into quadratiic formula we get an x value

D. 0=x^2-2x+5
if we put into quadratic formula, there is not x intercept

D is answer

Hi Tarry

The answer is D

I am sorry that I can't show how to graph it but there is no x-intercept

I hope that's help !

If 20% of p is 10, then how much is 10% of p?

Answers

5 because half of 20 is 10 so half of 10 is 5

Find the inverse f(x)= 3x-5/2

Answers

I hope it helps you get it right

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