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Nonamiya [84]
3 years ago
12

A road crew must repave a road that is 2/5 miles long. They can repave 1/30 miles each hour. How long will it take the crew to r

epave the road?
Mathematics
1 answer:
ladessa [460]3 years ago
8 0
2/5 = 12/30
1/30*12 = 12/30
It will take them 12 hours to repave the road.
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Determine the equation of the circle graphed below. <br><br> ( please help me )
shepuryov [24]

Answer:

(x - 3)² + (y + 5)² = 10

Step-by-step explanation:

The equation of a circle in standard form is

(x - h)² + (y - k)² = r²

where (h, k) are the coordinates of the centre and r is the radius

Here (h, k) = (3, - 5 ) , then

(x - 3)² + (y - (- 5) )² = r² , that is

(x - 3)² + (y + 5)² = r²

r is the distance from the centre to a point on the line

Calculate r using the distance formula

r = \sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2    }

with (x₁, y₁ ) = (3, - 5) and (x₂, y₂ ) = (6, - 4)

r = \sqrt{(6-3)^2+(-4+5)^2}

  = \sqrt{3^2+1^2}

  = \sqrt{9+1}

   = \sqrt{10} ⇒ r² = (\sqrt{10} )² = 10

(x - 3)² + (y + 5)² = 10 ← equation of circle

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Step-by-step explanation:

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What is a multiplication problem using two decimals that has a product greater than 0.1 but less than 0.2
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What are the coordinates of the y-intercept of the line who's equation is 12x + 13y =8???
Ierofanga [76]

Answer:

y-intercept = (0,  \frac{8}{13} ).

Step-by-step explanation:

Given the linear equation in standard form, 12x + 13y = 8:

We must transform this equation into slope-intercept form to make it easier to determine the coordinates of the y-intercept.

12x + 13y = 8

Subtract 12x from both sides:

12x + 13y - 12x = - 12x + 8

13y = - 12x + 8

Next, divide both sides of the equation by 13 to solve for y:

\frac{13y}{13} = \frac{-12x + 8}{13}

y = \frac{-12x + 8}{13} or  y = -\frac{12}{13} x + \frac{8}{13}

Next, to determine the y-intercept, we must set x = 0 (because the y-intercept is  the point where the graph of the linear equation crosses the y-axis).

Let x = 0:

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y = -\frac{12}{13} (0) + \frac{8}{13}

y = \frac{8}{13}

Therefore, the value of y when x = 0 is \frac{8}{13} . This is the y-intercept, and its coordinate is (0,  \frac{8}{13} ).

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MA_775_DIABLO [31]

Answer: The prime numbers are 1,  2, 3, 5, 7.

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