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3 years ago

Help me please, show your work, Thanks

Mathematics

1 answer:

anzhelika [568]3 years ago

3 0

120 x .2=24
120-24=96
96=the discounted price

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(x-1)^2+(2-x)^2-3(x-5)*(x-5)

Natali5045456 [20]

Answer:

$-x^2+24x-70$

Step-by-step explanation:

$(x-1)^2+(2-x)^2-3(x-5)*(x-5)\\=> (x - 1)^2 + (2 - x)^2 - 3(x - 5)^2\\=> x^2 - 2x + 1 + 4 - 4x + x^2 - 3(x - 5)^2\\=> x^2 - 2x + 5 - 4x + x^2 - 3(x - 5)^2\\=> x^2 - 6x + 5 + x^2 - 3(x - 5)^2\\=> 2x^2 - 6x+5 - 3(x - 5)^2\\=> 2x^2 - 6x+5 - 3(x^2 - 10x + 25)\\=> 2x^2 - 6x+5 - 3x^2+30x-75\\=> -x^2 - 6x + 5 + 30x - 75\\=> -x^2 + 24x + 5-75\\=> -x^2+24x-70$

Formula used =

$(a-b)^2 = a^2+ 2ab + b^2$

8 0

3 years ago

S = { x ; x is a multiple of 8. 0 < x <30 } Describe this set in another method

Firdavs [7]

Step-by-step explanation:

Hi,

Let's describe it in listing method;

S= {8,16,24}.

Hope you got it...

3 0

3 years ago

I need help with please

gregori [183]

Answer:

Step-by-step explanation:

4 0

2 years ago

What is the sum of the interior angles of the polygon shown?

Virty [35]

The sum of the interior angles of the polygon shown is 540 degrees

Solution:

The sum of the measures of the interior angles of a polygon with n sides is:

$Sum = (n -2) \times 180$

From given figure in question,

Number of sides in polygon = 5 ( which is a pentagon )

Therefore,

n = 5

Thus the sum of measures of interior angles is:

$Sum = (5-2) \times 180\\\\Sum = 3 \times 180\\\\Sum = 540$

Thus the sum of the interior angles of the polygon shown is 540 degrees

3 0

3 years ago

1. When you pay a bill in full, you are

Marat540 [252]

1. When you pay a bill in full, you are
a. paying it off

2. APR stands for
c. annual percentage rate

3. when calculating interest accrued, you should
c. multiply the principal by the APR and number of months, then divide by the total number of the months in the year.

4. --- are used to take money directly from your account
b. Debit cards

5. A pack of gum would be considered a
b. small ticket item

6. Interest rates on mortgages are lower because the home is
b. secured

7 0

3 years ago

Read 2 more answers