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4 years ago

6

Shelby purchases her college books for the upcoming semester she has to pay $98 for a Biology book 83 for a used poetry book and

$74 for an algebra textbook if the sales tax rate is 7.5% how much tax will Shelby pay

1 answer:

cluponka [151]4 years ago

5 0

19.25 I believe I may be wrong but I did the math

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What is the range of the function f(x)= -2x-4 when the domain is {-3,-2,-1}?

Paha777 [63]

F(-3)=(-2)*(-3)-4=6-4=2

F(-2)=(-2)*(-2)-4=4-4=0

F(-1)=(-2)*(-1)-4=2-4=-2

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3 years ago

How to solve number 1?

Archy [21]

$E(x)=5(x-1)(x+2)-(x+2)^2\\\\1)\ 5(x^2+2x-x-2)-(x^2+2x\cdot2+2^2)\\=5(x^2+x-2)-(x^2+4x+4)\\=5x^2+5x-10-x^2-4x-4\\=4x^2+x-14\neq4x^2+x+1\\\\2)\ E(x)=1\ for\ E(x)=4x^2+x+1\\\\4x^2+x+1=1\ \ \ \ |subtract\ 1\ from\ both\ sides\\4x^2+x=0\\x(4x+1)=0\iff x=0\ \vee\ 4x+1=0\\x=0\ \vee\ 4x=-1\\\boxed{x=0\ \vee\ x=-0.25}$

$3)\ H(x)=9x^2-(2x+1)^2\\\\a.\ H(x)=(3x)^2-(2x+1)^2=[3x-(2x+1)](3x+2x+1)\\=(3x-2x-1)(5x+1)=(5x+1)(x-1)\\\\b.\ H(x)=0\\\\(5x+1)(x-1)=0\iff5x+1=0\ \vee\ x-1=0\\5x=-1\ \vee\ x=1\\\boxed{x=-0.2\ \vee\ x=1}$

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3 years ago

Which points lie in the second quadrant? Check all that apply.

Tomtit [17]

Hello there! Point E and Point F are in the second quadrant.

The second quadrant is the first quadrant you see (upper right, see image attached for all quadrants). In this quadrant, you can see the points E and F. These are your correct answers.

I hope this helps and have a great day!

4 0

3 years ago

Read 2 more answers

What is 28.26 rounded to the nearest hundreth

In-s [12.5K]

28.26 rounded to the nearest hundredth is 28.3

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3 years ago

4. Andrew likes to solve puzzles.

just olya [345]

Answer:

Step-by-step explanation:

Andrew likes to solve puzzles.

It took him 4.5 minutes to complete one puzzle with 18 numbers.

It took him 6 minutes and 24 seconds to complete a different puzzle with 32 numbers.

a For each puzzle work out how many seconds it took Andrew to complete one number.

b Use your answer to part a to decide which puzzle Andrew completed faster.

8 0

3 years ago