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Molodets [167]
3 years ago
9

Please help me with how to solve this equation by completing the square. The answer should be (2, -6)

Mathematics
1 answer:
OLga [1]3 years ago
5 0

Answer:

(2, -6)

Step-by-step explanation:

5n^2+20n-60

(5n+30)(n-2)

5n + 30 = 0

5n = -30

(5n = -30)/5

n = - 6

n - 2 = 0

n = 2

answer: (2, -6)

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Bogdan [553]

Answer:

the cost price is 27,715

Step-by-step explanation:

Let the cost price be x

As Amab sells to Vivek at 15% profit

So the selling price be

= 115 ÷ 100 × x = 1.15x

And Vivek sells to sagar at a profit of 10%

= 1.15x × 110 ÷ 100

= 1.265x

Now sagar pays it for 35,060

So , the cost price be

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Hence, the cost price is 27,715

3 0
2 years ago
Sin(x+20) - cos (2X+10)
Vladimir [108]

Answer:

X=20

Step-by-step explanation:

Sin(x+20)=cos(2x+10)

Sin(x+20)=sin(90-(2x+10)

X+20=90-2x-10

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8 0
2 years ago
PLEASE ANSWER ASAP WORTH 100 points get it right please
Trava [24]

Answer:

See below.

Step-by-step explanation:

Part A:

triangle QPR and triangle PSR are similar

Part B:

Triangle QPR is a right triangle with right angle QPR.

Triangle SPR is a right triangle with right angle PSR.

Angle QPR of triangle QPR corresponds to and is congruent to angle PSR of triangle PSR.

Angle R of triangle QSR corresponds to and is congruent to angle R of triangle PSR.

The similar triangles by AA Similarity are

triangle QPR and triangle PSR

Part C:

QR/PR = PR/SR

16/PR = PR/4

PR² = 16 * 4

PR² = 64

PR = 8

8 0
2 years ago
The value of y is directly proportional to the value of x. Given y = 12 when x = 36.
Ahat [919]

Answer:

y = 20

Step-by-step explanation:

The problem states that y = 12 when x = 36. 36/12 is 3. This means that y is a third of what x is. This would mean that if x = 60, y would be a third of 60 which is 20 since 60/3 is 20.

5 0
2 years ago
Which measurement is a perfect square? the area of a rectangle with a length of 5 and a width of 10 the area of a rectangle with
Assoli18 [71]

Answer:

  the area of a rectangle with a length of 5 and a width of 5

Step-by-step explanation:

Area of a rectangle is found by multiplying length and width. When those values are the same, the result is a perfect square.

The area of a rectangle with a length of 5 and a width of 5 is a perfect square.

6 0
3 years ago
Read 2 more answers
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