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Paul [167]
3 years ago
11

Find the value of "k", given that one solution of the equation x2-kx+21=0 is 3

Mathematics
1 answer:
Ilia_Sergeevich [38]3 years ago
5 0
Plug in 3 for x and solve for k.
(3)^2-3k+21=0
3k=9+21
3k=30
k=10
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3 years ago
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dlinn [17]

Answer:

12

Step-by-step explanation:

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2 years ago
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Use the distance formula to find distance between two points. Need help on this ASAP.
astra-53 [7]

Answer:

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Step-by-step explanation:

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D = √256 + 144

D = √400

D = 20

b) D = √(10-8)^2 + (9-2)^2

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3 0
3 years ago
Convert 0.450 to a proper fraction
Aneli [31]

Answer:

9/20

Step-by-step explanation:

450/1000

this is not the answer, because it is not simplified

so here we have to find common factor and simplifying

________________________________________________

450/1000 is simplified to 9/20, and it can no longer be simplified.

4 0
3 years ago
What is the simplified form of the expression k^3(k7/5)^-5
saveliy_v [14]
The expression can be simplified as:

k^3(k7/5)^-5
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(Collecting the powers of k at one side and the constants at other side)
= k^-2 * (5/7)^5
(Solving thr integer powers)
= k^-2 * (3125/16807)
4 0
3 years ago
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