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4 years ago

Three friends bought 4, 6, and 8 books. The table shows the cost of the books.

Mathematics

1 answer:

Flura [38]4 years ago

3 0

Answer: B 7.5

Step-by-step explanation:

Y = Kx

4 = k30

k = 30/4

k = 7.5

Y = KX

X Y

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Given the polynomial 2x3 + 18x2 − 18x − 162, what is the value of the coefficient 'k' in the factored form?2x3 + 18x2 − 18x − 16

s344n2d4d5 [400]

Answer:

$k=3$

Step-by-step explanation:

Let

$f(x)=2x^3+18x^2-18x-162$

We factor 2 to obtain;

$f(x)=2(x^3+9x^2-9x-81)$

We factor the polynomial within the parenthesis by grouping.

$f(x)=2(x^2(x+9)-9(x+9)$

$f(x)=2(x^2-9)(x+9)$

$f(x)=2(x^2-3^2)(x+9)$

We apply difference of two squares on the second factor: $x^2-3^2=(x-3)(x+3)$

$f(x)=2(x+3)(x-3)(x+9)$

We now compare to;

$f(x)=2(x+k)(x-k)(x+9)$

It is now obvious that $k=3$

6 0

3 years ago

Please help meeeee it’s actually super easy

rewona [7]

The area for that shape should be 28 because 20+8=28! Hope this helps.

4 0

3 years ago

HELP MEE!!! PLEASE

prohojiy [21]

Answer: 45 items

Step-by-step explanation:

2 key chains in 5 bags so 2+2+2+2+2=10

Then it says 7 treats in each 5 bags so

7+7+7+7+7=35

So 10+35=45 so she had 45 items

And put 9 items in each bag

3 0

2 years ago

PLEASE HURRY I HAVE A LITTLE BIT OF TIME TO TURN IT IN

Elena L [17]

Answer:

4.25-5 minutes

Step-by-step explanation:

Its shown in the graph and table that the speed was 0 between those times.

7 0

3 years ago

Graph the inequality in the coordinate plane. x<-6

puteri [66]

Answer:

You would make a dotted vertical line running through -6 on the horizontal or x axis. The shading would go to the left side of the line since x is less than -6 and the line is dotted because it is only less than and not equal to.

Step-by-step explanation:

See image

5 0

4 years ago