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igor_vitrenko [27]
3 years ago
9

I need help asap please

Mathematics
1 answer:
rjkz [21]3 years ago
3 0

Answer:

x = -\frac{3}{2} or x = 1

Step-by-step explanation:

Using the zero product property, first step is to set the given equation, 2x^2 + x - 1 = 2 , to zero. Then factorise the left side.

Thus,

2x^2 + x - 1 = 2

Subtract 2 from both sides

2x^2 + x - 1 - 2 = 2 - 2

2x^2 + x - 3 = 0

Factorise the left side

2x^2 + 3x - 2x - 3 = 0

x(2x + 3) - 1(2x + 3) = 0

(x - 1)(2x + 3) = 0

Find the solution

x - 1 = 0

Or

2x + 3 = 0

x = 1

Or

2x + 3 = 0

2x = -3

x = -\frac{3}{2}

The answer is: x = 1 or x = -\frac{3}{2}

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lara [203]

Answer:

76

Step-by-step explanation:

(88+72+44+x)/4=70

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204+x=280

x=76

Therefore, Tammy needs to score a 76 on her last test to get at least an average of 70.

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3 years ago
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ludmilkaskok [199]

Answer: the answer i got is the 30


Step-by-step explanation:

so first you had to do the parentheses

(5-2)=3

[4+6 multiplied by 3] + 8

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3 years ago
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sashaice [31]

Answer:

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Step-by-step explanation:

Volume = Length x Width x Height

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Solve the following system of equations.express your answer as an ordered pair in the format (a,b) with no spaces between the nu
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Answer: (3,2)

Step-by-step explanation:

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9x+12y=51

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Now, we can add the 2 equations together for the y to cancel out.

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Since we know x, we can plug it into any of the equations to find y.

3(3)+4y=17

9+4y=17

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With out x and y value, we can put them into an ordered pair. (3,2)

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