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2 years ago

Solve (x+3)^2=8 using the quadratic formula.

Mathematics

1 answer:

KonstantinChe [14]2 years ago

5 0

Answer:

Step-by-step explanation:

= x^2+6x+9-8=0

=x^2+6x+1=0

D=b^2-4ac

D= 36-4

D=32

x=-b±root D/2a

x=-6+4root2/2 , x = -6-4root2/2

simplify you get the least form...

hope it helps

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3 ( x + 8 ) = 5 -1/2 ( 8x + 18 )

Contact [7]

Answer:

x=-4

Step-by-step explanation:

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3 years ago

What is the equation of a circle that has a center at (-4, 10) and a radius of 8?

mars1129 [50]

Answer:

The equation of the circle is $(x + 4)^2 + (y - 10)^2 = 64$ , third option is correct.

Step-by-step explanation:

Equation of a circle:

The equation of a circle with center $(x_0,y_0)$ and radius r is given by:

$(x - x_0)^2 + (y - y_0)^2 = r^2$

Center at (-4, 10)

This means that $x_0 = -4, y_0 = 10$ .

Radius of 8:

This means that $r = 8$ . So

$(x - x_0)^2 + (y - y_0)^2 = r^2$

$(x - (-4))^2 + (y - 10)^2 = 8^2$

$(x + 4)^2 + (y - 10)^2 = 64$

The equation of the circle is $(x + 4)^2 + (y - 10)^2 = 64$ , third option is correct.

3 0

2 years ago

Rounded to the nearest tenth, approximately how many ounces is 82.4 kilograms?

Naddik [55]

Answer: it's D

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2 years ago

About 1414% of the population of a large country is nervous around strangersnervous around strangers. If two people are randoml

seraphim [82]

One person being nervous around strangers is assumed independent of other people behaviour. Then, the multiplication rule can be applied as

both nervous = 0.14*0.14 = 0.0196 = 1.96%

one is nervous, one is not nervous = 0.14*(1-0.14) = 0.1204 = 12.04%

At least one nervous = 1.96% + 12.04% = 14%

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2 years ago

A triangle has a perimeter of 165 cm. The first side is 65 cm less than twice the second side. The third side is 10 cm less than

Neko [114]

Answer:A triangle has a perimeter of 165 cm. The first side is 65 cm less than twice the second side. The third side is 10 cm less than the second side. Write and solve an equation to find the length of each side of the triangle.

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Step-by-step explanation:

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2 years ago