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miskamm [114]
3 years ago
11

in a certain store, the regular price of a refrigerator is $600. how much money is saved by buying the refrigerator at 20% off t

he regular price rather than buying it on sale at 10% off regular price with an additional discount of 10% off the sale price?
Mathematics
1 answer:
Advocard [28]3 years ago
6 0
60$. These are my equations :
600 * 0.2 = 120 ; 600 - 120 = 480
Then...
600 * 0.1 = 60 ; 600 - 60 = 540
Which then became....
540 - 480 = 60
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The lines below are parallel. If the slope of the green line is -3, what is the
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Answer:

m=-3

Step-by-step explanation:

Since the lines are parallel to each other, their gradients are equal.

∴ gradient of green line = gradient of red line

∴ m = -3

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2 years ago
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Given sinx+1/sinx=1+cscx, find a numerical value of one trigonometric function of x.
Nana76 [90]

Answer:

x = π/2 or

x = π/2 + 2πn (for any value of n)

Step-by-step explanation:

We need to find the numerical value of the trigonometric function sinx+1/sinx=1+cscx

Subtract 1+cscx on both sides

sinx + 1/sinx -(1+csc x) = 1+cscx - (1+cscx)

sinx + 1/sinx -1 -csc x = 0

Taking LCM i.e, sinx and solving

(sinx)(sinx) + 1 - sinx -cscx(sinx) / sinx = 0

Multiplying sinx on both sides

sin^2 x + 1 -sinx - cscx(sinx) =0

as we know, cscx = 1/ sinx

sin^2 x + 1 -sinx - (1/sinx)(sinx) = 0

Solving,

sin^2 x + 1 -sinx - 1 = 0

sin^2 x - sin x =0

Let u = sinx

Putting it in above equation

u^2 - u =0

Solving the equation:

u= 1 , u= 0

Putting back the value of u

sin(x) = 1 and sin(x) = 0

x = sin ⁻¹ (1) and x = sin ⁻¹ (1) =0

x = 90° or π/2 and x = 0 (undefined for the question)

So, x = π/2 or

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larisa86 [58]

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The sum of the angle measures of any triangle is 180 degrees. Suppose that one angle in a triangle has a degree measure of 4x-7
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Write the sum of the three angles and set this sum equal to 180. Use (degree measure) to denote the third, unknown, angle:

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Now subtract 4x - 7 + 6x-4 from both sides. We get:

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