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kvasek [131]
3 years ago
8

To find the sale price of an item you have to add the original price plus the discount amount

Mathematics
1 answer:
Orlov [11]3 years ago
3 0

Answer:

True

Step-by-step explanation:

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Find the length of the chord made by 3x2 - y2 = 3 and y + x – 5 = 0.
MArishka [77]

Answer:

The correct answer is "9√2 units".

Step-by-step explanation:

The given equations are:

⇒ 3x^2-y^2=3...(equation 1)

⇒ y+x-5=0...(equation 2)

According to the 2nd equation, we get

⇒ y+x-5=0

⇒              y=5-x

On substituting the value of "y" in the 1st equation, we get

⇒  3x^2-y^2=3

     3x^2-(5-x)^2=3

     3x^2-(25+x^2-10x)=3

     2x^2+10x-28=0

On taking common, we get

     x^2+5x-14=0

On applying factorization, we get

     x^2+7x-2x-14=0

   x(x+7)-2(x+7)=0

           (x+7)(x-2)=0

                        x+7=0

                              x=-7

or,

                         x-2=0

                                x=2

Now,

The points are:

(-7, 12) = (x₁, y₁)

(2, 3) = (x₂, y₂)

By using the distance formula, the length of chord will be:

= \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}

On substituting the values in the above formula, we get

= \sqrt{(2-(-7))^2+(3-12)^2}

= \sqrt{(9)^2+(-9)^2}

= \sqrt{81+81}

= 9 \sqrt{2} units

8 0
2 years ago
To convert a fraction to a decimal, you have to divide ________ by the _________?
Burka [1]
To convert a fraction to a decimal, you have to divide the denominator by the numerator.


<em>HOPE THIS HELPS! HAVE A GREAT DAY!!!</em>
6 0
3 years ago
Read 2 more answers
Can someone help me answer this?
mart [117]

Answer:

x = 40 , y = 70

Step-by-step explanation:

y = 70°

x° = 180° - 2 × 70° = 40°

5 0
3 years ago
Read 2 more answers
What’s the exact value of Cos(127.5)? Using trig identities like half angle and PLEASE EXPLAIN
vlada-n [284]

Answer:

−0.608761429

Step-by-step explanation:

use the pathagreom theorem if you have two sides subtract that from 180

8 0
3 years ago
3/5 × -4/7 + 4/35 - 3/10 × 4/7
Annette [7]

Answer:

I think its -2/5 but not sure

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
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