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3 years ago

Using the Quadratic Formula, which of the following is the solution to the quadratic equation x2 - 3x - 28 = 0?

Mathematics

2 answers:

algol133 years ago

8 0

The answer is (x+7)(x-4)

hence, the solution should be C

Vinvika [58]3 years ago

8 0

x = [ -)-3) +/- sqrt((-3)^2 - 4*1*-28) ] / 2

= (3 + sqrt 121) / 2 and (3 - sqrt 121) / 2

= 3/2 + 11/2 and 3/2 - 11/

= (1.5 + 5.5) and 1.5 - 5.5

Answer is 7, -4

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Solve for x.<br><br> 5.2(x−6.7)=46.28

Grace [21]

$5.2(x - 6.7) = 46.28$

Divide both sides of the equation by 5.2

$x - 6.7 = 8.9$

Move the constant to the right-hand side and change its sign

$x = 8.9 + 6.7$

Add the decimals

$x = 15.6$

7 0

2 years ago

Read 2 more answers

An important factor in solid missile fuel is the particle size distribution. significant problems occur if the particle sizes ar

bogdanovich [222]

Answer:

See solution below.

Step-by-step explanation:

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3 years ago

Let f be a real-valued function defined on [0,∞), with the properties: f is

USPshnik [31]

im not sure this is right

g'(x) = 6b(-5x + 1)^5 (-5)

g'(x) = -30b(-5x +1)^5

g''(x) = -30b(5)(-5x + 1)^4 (-5)

g''(x) = 750b (-5x +1)^4

g(x) = b(−5x + 1)6 − a

when

g(-x) = b(5x +1)6 - a

g'(x) = -30b(-5x +1)^5 = 0

-5x +1 = 0

x = 15

8 0

2 years ago

Not a clue please help

USPshnik [31]

Since the "size in square feet" is on the X-axis it is represented by the X in the equation. And Y is expected property tax

It is giving you a X-value of 3100. So you just have to plug 3100 into the X spot and solve for Y

y=.392(3100)+638.118
y=1853.318

So the third answer.

8 0

3 years ago

If the diameter of a golf hole is 4.25 inches, what is the approximate circumference of the hole?

shepuryov [24]

The formula for circumference is pi(diameter) or 2 x pi x radius. So you have the diameter which is 4.25. Next step you need to do is multiply it with pi which is equal to 3.14. Your equation would be C= 3.14 x 4.25.

6 0

3 years ago