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2 years ago

If an item that originally cost $20 is increased to $27, what is the percentage of increase in the item?

2 answers:

4 0

Answer:

35.00% increase

Explanation:

[(New value - Old value)/Old value] x 100 = answer
Hope this helps in the future

8090 [49]2 years ago

4 0

The person above is correct

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The Smith's dinner bill is $76.60. Mrs. Smith is going to leave a 20% tip. How much money will Mrs. Smith leave for the tip?

Diano4ka-milaya [45]

Answer:

She left a $15.32 tip

Step-by-step explanation:

20% of $76.60=

First find 10% of $76.60 (Divide it by 10)= $7.66

Multiply it by 2 = $15.32

7 0

3 years ago

According to the Rational Root Theorem, which function has the same set of potential rational roots as the function g(x) = 3x5 –

BaLLatris [955]

The function that has the same set of potential rational roots is
<span>4(3x5-2x4+9x3-x2+12). If you see it from your options I know this is the one who is closer to the same set you are looking for. </span>

7 0

4 years ago

Read 2 more answers

Pls help me.<br>proove it ^

aivan3 [116]

Answer:

We verified that $a^3+b^3+c^3-3abc=\frac{a+b+c}{2}[(a-b)^2+(b-c)^2+(c-a)^2]$

Hence proved

Step-by-step explanation:

Given equation is $a^3+b^3+c^3-3abc=\frac{a+b+c}{2}[(a-b)^2+(b-c)^2+(c-a)^2]$

We have to prove that $a^3+b^3+c^3-3abc=\frac{a+b+c}{2}[(a-b)^2+(b-c)^2+(c-a)^2]$

That is to prove that LHS=RHS

Now taking RHS

$\frac{a+b+c}{2}[(a-b)^2+(b-c)^2+(c-a)^2]$

$=\frac{a+b+c}{2}[a^2-2ab+b^2+b^2-2bc+c^2+c^2-2ac+a^2]$ (using $(a-b)^2=a^2-2ab+b^2$ )

$=\frac{a+b+c}{2}[2a^2-2ab+2b^2-2bc+2c^2-2ac]$ (adding the like terms)

$=\frac{a+b+c}{2}[2a^2+2b^2+2c^2-2ab-2bc-2ac]$

$=\frac{a+b+c}{2}\times 2[a^2+b^2+c^2-ab-bc-ac]$

$=a+b+c[a^2+b^2+c^2-ab-bc-ac]$

Now multiply the each term to another each term in the factor

$=a^3+ab^2+ac^2-a^2b-abc-a^2c+ba62+b^3+bc^2-ab^2-b^2c-abc+ca^2+cb^2+c^3-abc-bc^2-ac^2]$

$=a^3+b^3+c^3-3abc$ (adding the like terms and other terms getting cancelled)

$=a^3+b^3+c^3-3abc$ =LHS

Therefore LHS=RHS

Therefore $a^3+b^3+c^3-3abc=\frac{a+b+c}{2}[(a-b)^2+(b-c)^2+(c-a)^2]$

Hence proved.

8 0

4 years ago

What is the equation of a line with the point of (-1,-3) and a slope of -3

taurus [48]

Answer:

y+3=-3(x+1)

Step-by-step explanation:

y-y1=m(x-x1)

m=-3

y-(-3)=-3(x-(-1))

y+3=-3(x+1)

8 0

4 years ago

Sue charges a flat rate of $20 plus $10 per hour it takes her to mow a lawn. Which equation shows the correct way to find the co

Nookie1986 [14]

Answer:

y=20+10x

Step-by-step explanation:

From the information provided, the equation would indicate that the cost of mowing a lawn would be equal to the flat rate plus the result of multiplying the cost per hour for the number of hours:

y=20+10x, where:

y is the cost of mowing a lawn

x is the number of hours

3 0

3 years ago