3 years ago

Pls helpp the answers are above:)

Mathematics

1 answer:

DochEvi [55]3 years ago

5 0

Answer:

1. 130

2. 152

Step-by-step explanation:

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Which equation could be solved using this application of the quadratic formula? A. -2x2 â’ 8 = 10x â’ 3 B. 3x2 â’ 8x â’ 10 = 4 C

hodyreva [135]

The given question can be solve using quadratic formula.

The correct option is (c) $3x^2 +8x -10=-8$ .

Given:

The given equation is,

$x=\dfrac{-8\pm\sqrt{8^2-4(3)(-1)}} {2(3)}$ ---------------------------(1)

Write the general quadratic equation.

$ax^2 + bx +c=0$

Write the quadratic formula.

$x =\dfrac {-b \pm \sqrt{(b^2 - 4ac)} } {2a}$ ------------------------------- (2)

Compare equation (1) and (2).

$a=3\\b=8\\c=-2$

Substitute the value of $a$ , $b$ and $c$ in general quadratic.

$3x^2 +8x -2=0$

Subtract $8$ from each side of above equation.

$3x^2 +8x -2 -8=0-8\\3x^2 +8x -10=-8$

Thus, the correct option is (c) $3x^2 +8x -10=-8$ .

Learn more about quadratic equation here:

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Brain has 3 basket ball cards and 5 baseball cards what fraction of brains are baseball cards

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5/8 are baseball cards

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Determine how many seats there would be in the 5th row

Vitek1552 [10]

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I think there would be 12 seats

Step-by-step explanation:

The pattern adds two each time, so you can look at the last row and add two. 10+2=12

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Step-by-step explanation: 20 divided by 3 is 6, so if you divided that 120 by 6 you get 20.

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Step-by-step explanation:

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_____

The % symbol is a shorthand way to write "/100", so 3.5% = 3.5/100.

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