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2 years ago

5

I need helppppp......

1 answer:

Roman55 [17]2 years ago

3 0

Answer:

l and n are parallel

Step-by-step explanation:

360° around a point

65° x 2 = 130

360 - 130 = 230

230/2 = 115

115 ° are corresponding angles

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Nate measured an apartment and made a scale drawing. The living room is 2 millimeters long in the drawing. The actual living roo

Vlada [557]

Alright! So, we know that in his drawing the living room is 2 millimeters long, and in reality it is 10 meters long. So, to find out how much 1 millimeter is we divide 10 by 2.

[10 ÷ 2] = 5.

One millimeter is 5 meters in reality.

The ratio is 1:5

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3 years ago

Help me guys for 7 8 10 and 11 please

mixas84 [53]

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3 years ago

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Which expression can be used to find the value of the expression below? (7/10) + 2/8 + 1/10 - (4/8)

kvv77 [185]

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Step-by-step explanation:

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3 years ago

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1. Determine whether the situation is a permutation or a combination

iVinArrow [24]

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2 years ago

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Stella [2.4K]

<u>Question:</u>

Find the number of real number solutions for the equation. x^2 + 5x + 7 = 0

<u>Answer:</u>

The number of real solutions for the equation $x^{2}+5 x+7=0$ is zero

<u>Solution:</u>

For a Quadratic Equation of form : $a x^{2}+b x+c=0$ ---- eqn 1

The solution is $x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}$

Now , the given Quadratic Equation is $x^{2}+5 x+7=0$ ---- eqn 2

On comparing Equation (1) and Equation(2), we get

a = 1 , b = 5 and c = 7

In $x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}$ , $b^2 - 4ac$ is called the discriminant of the quadratic equation

Its value determines the nature of roots

Now, here are the rules with discriminants:

1) D > 0; there are 2 real solutions in the equation

2) D = 0; there is 1 real solution in the equation

3) D < 0; there are no real solutions in the equation

Now let solve for given equation

$D= b^2 - 4ac\\\\D = 5^2 - 4(1)(7)\\\\D = 25 - 28 \\\\D = -3$

Since -3 is less than 0, this means that there are 0 real solutions in this equation.

4 0

3 years ago