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3 years ago

Which of the following indicates that the roots of a quadratic are irrational

1 answer:

6 0

Answer would be D You can have a rational discriminant for an irrational root, but you can also have rational discriminant for a rational root. So C is partially correct.

<span>All prime discriminants will result in an irrational root, but not all irrational roots have prime discriminants </span>

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Pls show work?!!!!!!!

Paraphin [41]

Answer: 55.5 (A.)

Step-by-step explanation:

Since angle A = 29 and angle B = 41, angle C must be equal to 110

180 = m<A + m<B + m<C

180 = 29 +41 + m<C

180 = 70 + m<C

110 = m<C

Therefore, side c must be the longest, side b must be the second longest, and side a must be the shortest.

Since side length a, angle A, and angle B are known, one can use the law of sines to solve for side b.

Law of Sines: sinA/a = sinB/b = sinC/c

sinA/a = sinB/b

sin29/41 = sin41/b

b(sin29/41) = sin41

b = 41(sin41)/(sin29)

b = 55.48

b = 55.5

7 0

2 years ago

If tan a= 7/24 find sin a and cos a..

aev [14]

Tan=sin/cos
So sin a= 7
Cos a= 24

5 0

2 years ago

Please help me at 7,11,13

MAXImum [283]

Answer:

Step-by-step explanation:

6 0

2 years ago

Rosa is making a poster that has a rainbow as part of the design. Using a compass she draws a semicircle with a radius of 18 cm.

Keith_Richards [23]

Answer:

282.7 cm²

Step-by-step explanation:

Hello There!

To find the area of the shaded area we are going to want to find the area of the whole semi circle and subtract it by the area of the smaller semi circle

To find the area of a semicircle we use this formula

$A=\frac{\pi r^2}{2}$

where r = radius

For the large semi circle

The radius of the larger semi circle is 18 cm so we plug in 18 into r in the formula

So..

$A=\frac{\pi 18^2}{2} \\18^2=324\\324\pi =1017.87602\\\frac{1017.87602}{2} =508.9380099$

So the area of the whole semi circle is 508.9380099 cm²

Now to find the area of the smaller semi circle

The radius for the smaller semi circle is 12 cm so we plug in 12 into r in the formula

$A=\frac{12^2\pi }{2} \\12^2=144\\144\pi =452.3893421\\\frac{452.3893421}{2} =226.1946711$

so the area of the smaller semi circle is 226.1946711cm²

Finally we want to subtract the area of the smaller semi circle from the area of the whole semi circle

508.9380099 - 226.1946711 = 282.7433388

Finally we want to round to the nearest tenth and we get that the area of the rainbow is 282.7 cm²

4 0

2 years ago

18 divided by what is 12

svlad2 [7]

Answer:

1.5

Step-by-step explanation:

18÷12=1.5

To double check, you can do 12×1.5, which equals 18.

6 0

3 years ago

Read 2 more answers