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kati45 [8]
3 years ago
15

Need help , don’t understand !!

Mathematics
1 answer:
mixer [17]3 years ago
5 0

Quadratic Formula is (-b ±√(b²-4ac))/2a

With that being said:

y=2x²-5x-1 is in the correct form of ax²+bx+c

Now just plug in:

5±√(25-4(2 x-1))

5± √25+8

(5±√33)/2(2)

Answer is D

100% Sure


Brainliest?

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4 0
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Solve for y in the following system of equations: −x+y=0 −2x+y=−5 1. 5 2. 7 3. 6 4. 5
lord [1]

Answer:

y = 5

Step-by-step explanation:

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8 0
3 years ago
Jim is 3 times as old as his cousin Anthony the difference in their age is 18.How old is Jim?
IgorC [24]
Let's create expressions and equations to model this situation. Let Anthony's age be a.

"Jim is 3 times as old as his cousin, Anthony." Jim's age is 3a.
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How old is Jim?

Let's solve the above equation for a to first find Anthony's age.

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Remember, Jim's age is represented by the expression 3a. Substitute Anthony's age, 9, into the expression to find Jim's age.

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Answer:
Jim is 27 years old.
6 0
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