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2 years ago

Please help me and hurry

Mathematics

1 answer:

myrzilka [38]2 years ago

4 0

Answer:

1; is 20 2 is 50 3 is 18 4 is 9 and 5 is 16

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:

brainly.com/question/17177510

6 0

2 years ago

Use the set B = {5, 7, 9, 11} to determine n(B).<br> n(B) = 0

kkurt [141]

9514 1404 393

Answer:

n(B) = 4

Step-by-step explanation:

There are four (4) elements in set B.

n(B) = 4

5 0

2 years ago

A contractor digs a hole for the basement of a new house that is 40 feet long and 10 1/2 feet deep. What is the width of the hol

Ksju [112]

Volume = L * W * D 6,510
= 40 * W * 10.5
W = 6,510/(40 * 10.5)
= 15.5 ft
hope this helps

9 0

3 years ago

15+(-11)+17=?<br><br> sjow how you got the answer

Tresset [83]

Answer:

Step-by-step explanation:

15 - 11 +17

plug in calculator

or 15-11 = 4

and

4 +17 = 21

8 0

3 years ago

The point where two lines cross is called a(n) __________.

aleksklad [387]

Answer:

Intersection or perpendicular lines

Step-by-step explanation:

Can you help me by going to this lin and signing up please it's for a scholarship

8 0

3 years ago

Read 2 more answers