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77julia77 [94]
3 years ago
11

4. HELP ME PLS W THE CORRECT ANSWER

Mathematics
1 answer:
Shalnov [3]3 years ago
4 0
Please low south windows
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Find the value of k for which the quadratic equation 4x2+kx+3=0 has equal roots.​
charle [14.2K]

Answer:

k = +/-√48

Step-by-step explanation:

4x^2 + kx + 3 = 0

For equal (duplicate) roots the discriminant = 0, so

k^2 - 4*4*3 = 0

k^2 - 48 = 0

k^2 = 48

k = +/-√48

4 0
3 years ago
A target has a bull’s-eye with a diameter of 2 inches. the outer ring is 1 inch wide. what is the area of the outer ring?
andrew11 [14]
The diameter of the outer ring will be 4 inches since it extends one inch beyond the bull's eye from either side. See the attached image for clarification.

The area of the outer ring can be expressed as:
Area_{outerring} = Area_{outercircle} - Area_{bullseye}
This is because we need to take into account of the space taken up by the bullseye. 

Now we set up our equation:
Area_{outerring} =  \pi r^{2}_{outercircle} -  \pi r^{2}_{bullseye}

Now plug and solve:
Area_{outerring} =  \pi 2^{2} -  \pi 1^{2}
Area_{outerring} =  4\pi -  \pi
Area_{outerring} = 9.42477796

3 0
4 years ago
Read 2 more answers
Adele is 5 years older than Timothy. In three years, Timothy will be 2/3 of Adele’s age. What is Adele’s current age?
Verdich [7]
28 she is 28 years old
3 0
3 years ago
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A triangle has angles that measure 46° and 61°. What is the measure of the third angle? A. 15° B. 73° C. 107° D. 134°
Nastasia [14]
The interior angles of a triangle need to be equal to 180°, so to solve this you need to figure out how many degrees you need to get 180°.

46 + 61 = 107

180 - 107 = 73

The measure of the third angle is B. 73°.
5 0
3 years ago
The probability of not choosing a black shirt is...? please explain!
AleksAgata [21]

Answer:

80% or 8/10.

Step-by-step explanation:

Assuming the shirts in the bottom right are the "black" shirts, there is ten total shirts (1 red, 4 blue, 2 green, 1 white,  2 black.) Out of the ten shirts, 8 are not black. This means that there is an 80% chance that you will select a shirt that is NOT black.

5 0
3 years ago
Read 2 more answers
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