2 years ago

1

Mathematics

1 answer:

Lubov Fominskaja [6]2 years ago

7 0

Answer:

Step-by-step explanation:

8.5 x 8.5= 72.25

so basically it's the closest answer

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Use mental math to find the sum. <br><br> 150 + 20 + 25

stiv31 [10]

Answer:

50 + 20 = 70
70 + 25 = 95
150 + 95 = 245

In conclusion, 150 + 20 + 25 equals to a total amount of 215.

Step-by-step explanation:

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2 years ago

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m_a_m_a [10]

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kakasveta [241]

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3 years ago

Write the standard equation of the circle with center (-14, -3) that passes through the point (-5,3),

grin007 [14]

Answer:

$(x + 14)^2 + (y + 3)^2 = 117$

Step-by-step explanation:

Equation of a circle:

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

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

In which r is the radius.

Center (-14, -3)

This means that $x_0 = -14, y_0 = -3$

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

$(x - (-14))^2 + (y - (-3))^2 = r^2$

$(x + 14)^2 + (y + 3)^2 = r^2$

Passes through the point (-5,3),

This means that when $x = -5, y = 3$ . We use this to find the radius squared. So

$(x + 14)^2 + (y + 3)^2 = r^2$

$(-5 + 14)^2 + (3 + 3)^2 = r^2$

$r^2 = 117$

So, the equation of the circle is:

$(x + 14)^2 + (y + 3)^2 = r^2$

$(x + 14)^2 + (y + 3)^2 = 117$

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3 years ago

Solve the equation. identify any extraneous solutions. x=√6x+7

marshall27 [118]

In order to solve the equation we first need to put the condition:
6x+7>=0
x>= -7/6

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x^2=6x+7
x^2-6x-7=0
x^2+x-7x-7=0
x(x+1)-7(x+1)=0
(x-7)(x+1)=0
x1=7
x2=1

Both solutions meet the condition.

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3 years ago