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2 years ago

Ndscmdvfdnvmdfmfd.efrmrefmerf

Mathematics

2 answers:

Mars2501 [29]2 years ago

8 0

This is simple. :)
All you have to do is plug in each of the coordinates.
So, for the first one, you would take the first option (-2,-9). The equation would look like this: -9=3(-2). -2*3 doesn't equal -9, so you move on to the other options, testing them out.

The second question is the same. For example, you take (2,14), plug it into the equation to make it look like this: 14=-5(2)+4
-5*2=-10
-10+4=-6
So the first option is not correct.

I hope this helps

Nata [24]2 years ago

5 0

-30=3 times -10
-21= -5 times 5 +4

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Find the value(s) of "k" that will cause the equation 4x^2 +kx + 4 to have one real solution.

Andreas93 [3]

Answer: k = {8, -8}

<u>Step-by-step explanation:</u>

In order for a quadratic equation to have exactly one solution, the discriminant must equal zero. → b² - 4ac = 0

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2 years ago

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SashulF [63]

Step-by-step explanation:

$\frac{\pi}{2} = 90$

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2 years ago

Calculate to the nearest 1/10th meter the length of the side of a 7th, 12th, and 30th hectare square plot.

Tems11 [23]

Answer and explanation:

To find : Calculate to the nearest 1/10th meter the length of the side of a 7th, 12th, and 30th hectare square plot.

Solution :

The area of the square is given by,

$A=s^2$ where s is the side length.

We know, $1 \text{ hectare}=10,000\ m^2$

1) The area of square plot is 7 hectare.

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$\sqrt{70000}=s$

$264.57=s$

Side nearest to 1/10th meter is 264.8 meter.

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Area in meter square is $A=12\times 10000=120000\ m^2$

Substitute the value in the formula,

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$\sqrt{120000}=s$

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Side nearest to 1/10th meter is 346.4 meter.

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2 years ago

By selling a stool for rupees 67.50,a carpenter loses 10%.how much percent would he gain or lose by selling it for rupees 82.50.

valentina_108 [34]

Let the actual value of the stool be x.

So if the carpenter sells the stool x rupees he neither loses, now wins anything.

67.50 is the value x - 10% of x, that is:

67.50=x-0.1x
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x=67.50/0.9=75 (rupees) is the actual value of the stool.

Selling the stool for 82.50 rupees, the carpenter clearly would make a profit, say of y% of that actual value, that is y%*75.

So using the same method:

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8 0

2 years ago

Can someone help me this is due soon

Hatshy [7]

Answer:

Step-by-step explanation:

3 + 8 + 7 + 2 + 6 + 4 = 30

<em>good luck, i hope this helps :)</em>

3 0

1 year ago

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