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boyakko [2]
3 years ago
10

Please help me on #37. I know for A you would use the quadratic equation but I got the wrong answer.

Mathematics
1 answer:
ozzi3 years ago
6 0
Δ = (8i)^2 - 4*(-25) => Δ = -36 +100 => Δ = 64 => x1 =(-8i + 8)/2 => x1 = -4i +4;
x2 = (-8i - 8)/2 => x2 = -4i-4; in this case, your solutions are complex conjugates.
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A cube has a side length of 13 millimeters.What is the surface area of the cube?
wel
Surface area of a cube is n^2, n being the measurment of any one side of the cube. In this case, 13x13=169, so the answer is 169 mL^2.
8 0
3 years ago
What is the perimeter of this figure, to the nearest unit?
lana66690 [7]

Answer:

P=38

Step-by-step explanation:

At this case I would use the circumference formula for the rounded part.

The formula of the circumference is C=2πr.

So... We know that the radius is 5 which is half of the diameter. So... C=2π5 which is C=10π or C=31.4 which we divide by 4 because on the image is 1/4th of a circle and C/4 which C=7.85 so the P of the whole figure is P=10+10+5+5+7.85 which is P=37.85 which will be P=38.

Answer: P=38

7 0
3 years ago
1.<br> (03.02)<br> Use the graph below to fill in the blank with the correct number:<br><br> f(−2) =
ikadub [295]
The correct answer is 2
Hope this helped :)
6 0
3 years ago
What is 9 + 10? This is hard homework
Lubov Fominskaja [6]
9 + 10=21 :)
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4 0
3 years ago
I need help this this
ipn [44]

Answer:

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Step-by-step explanation:

A perfect square is the product of a rational number multiplied by itself. So 11*11=121, 8*8=64, and 4*4=16

7 0
3 years ago
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