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Sidana [21]
3 years ago
5

A sofa regularly sells for $680. The sale price is $523.60. Find the percent decrease of the sale price from the regular price

Mathematics
1 answer:
Studentka2010 [4]3 years ago
3 0

Answer:

23%

Step-by-step explanation:

if 100% of it = $680 then multiply 100 and the sale price then divide it with actual price to find what's % is 523.60

100 × 523.60 ÷ 680 = 77

if 523.60 is 77% then the discount amount is 23%

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Use the x-intercept method to find all real solutions of the equation.<br> x^3-8x^2+9x+18=0
meriva

Answer:

a. x=-1,3,\:or\:6

Step-by-step explanation:

The given equation is;

x^3-8x^2+9x+18=0

To solve by the x-intercept method we need to graph the corresponding function using a graphing calculator or software.

The corresponding function is

f(x)=x^3-8x^2+9x+18

The solution to x^3-8x^2+9x+18=0 is where the graph touches the x-axis.

We can see from the graph  that; the x-intercepts are;

(-1,0),(3,0) and (6,0).

Therefore the real solutions are:

x=-1,3,\:or\:6

8 0
4 years ago
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What is the solution to the equation 1 over 8 multiplied by n equals 4?
SVETLANKA909090 [29]
N=32
Just multiply 4 by 8/1
5 0
3 years ago
V*4x= How do you simify this equation
attashe74 [19]
It's not time to try and simplify it until you HAVE an equation. You won't have an equation until you write down what. V*4x is equal to.
7 0
3 years ago
Determine the values of the variables in isosceles trapezoid CHLE below.
Alex73 [517]

Answer:

The values of variables x and m are 11 and 17

Step-by-step explanation:

The question has missing details as the diagram of the trapezoid isn't attached.

(See attachment).

Given that trapezoid CHLE is isosceles then the angles at the base area equal (4x)

And

The angles at the top are also equal

8m = 11x + 15

At this point, the four angles in the trapezoid are 8m, 11x + 15, 4x and 4x..

The sum of interior= 360

So,

11x + 15 + 8m + 4x + 4x = 360

Collect like terms

11x + 4x + 4x + 8m = 360 - 15

19x + 8m = 345

Substitute 11x + 15 for 8m

19x + 11x + 15 = 345

30x + 15 = 345

30x = 345 - 15

30x = 330

Divide through by 30

30x/30 = 330/30

x = 11

Recall that 8m = 11x + 15;

8m = 11(11) + 15

8m = 121 + 15

8m = 136

Divide through by 8

8m/8 = 136/8

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Hence, the values of variables x and m are 11 and 17

7 0
3 years ago
If f(x) and r1(x) are inverse functions of each other and f(x)=2x+5 , what is f^-1(8) ?
GenaCL600 [577]

Answer:

3/2

Step-by-step explanation:

Given y = 2x + 5, let's rewrite the equation in terms of x;

y = 2x + 5 => Bring 5 to the other side

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x = (y - 5)/2

If we want to take the inverse, simply swap the variable's positions...

We have y = (x - 5)/2

Now let's determine f^-1(8), substituting for "y" provided y is our inverse, f^-1

f^-1(8) = (8 - 5)/2 = 3/2

Solution: 3/2

5 0
3 years ago
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