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Dmitry_Shevchenko [17]

3 years ago

8

Susan buys 2 CDs. Each CD costs $10.99 plus 6% tax. How much change will Susan receive if she gives the cashier $30.00? 10 POINT

S! !!!PLEASE ANSWER!!!! :)))

1 answer:

Sonja [21]3 years ago

7 0

Total 23.30 Cash back 6.70

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I NEED URGENT ASSISTANCE

Nata [24]

Answer:

<em>8 C sometimes</em>

<em>9 64x^8 y^11</em>

<em>10 c 1.28r^2/ t^9</em>

Step-by-step explanation:

<u>Algebraic Operations </u>

Some basic rules must be fresh in our minds when trying to simplify complex algebraic expressions. For example, the power rule respect to the product or quotient:

$\displaystyle \left(\frac{x^n.y^m}{z^p}\right)^q= \frac{x^{qn}.y^{qm}}{z^{qp}}$

$\displaystyle \frac{x^n.x^q}{x^p}= x^{n+q-p}$

$\displaystyle x^{-n}=\frac{1}{x^n}$

Let's face the questions at hand

8. A number is raised to a negative exponent is negative?

Following the expressions recalled above, let's pick the expression

$\displaystyle 3^{-2}=\frac{1}{3^2}=\frac{1}{9}$

This is a negative power resulting in a positive number

Now we pick

$\displaystyle (-2)^{-3}=\frac{1}{(-2)^3}=-\frac{1}{8}$

This time, the negative power leads to a negative result, so it doesn't matter the sign of exponent to determine the sign of the result

<em>Answer: C sometimes </em>

9 simplify(4xy^2)^3(xy)^5

$(4xy^2)^3(xy)^5=4^3x^3(y^2)^3x^5y^5$

$=64x^3y^6x^5y^5$

$=64x^8y^{11}$

10 simplify(2t^-3)^3(0.4r)^2

$(2t^{-3})^3(0.4r)^2=2^3(t^{-3})^30.4^2r^2$

$=8t^{-9} 0.16 r^2$

$=1.28t^{-9} r^2$

$\displaystyle \frac{1.28 r^2}{t^9}$

7 0

3 years ago

PLEASE HELP MEEEEEEEE ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Archy [21]

Answer:

24 people.

Step-by-step explanation: If each group has to have 8 or 12 groups 24 is the smallest common multiple for both numbers.

6 0

2 years ago

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Find the sum and classify the polynomial based on degree and number of terms.

Elis [28]

3rd option or letter c

8 0

3 years ago

PLSS HELP ASAP 100 points + brainlist ONLY EVENS ALL PLSS

BARSIC [14]

Your answer is at the top good luck!

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3 years ago

Select the correct solution set. x + 17 ≤ -3

cestrela7 [59]

Answer:

{x | x ≤ -20}

Step-by-step explanation:

x + 17 ≤ -3

Subtract 17 from each side

x + 17-17 ≤ -3-17

x ≤ -20

7 0

3 years ago