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SpyIntel [72]
2 years ago
15

HELPPPPPPPPPPPPPPPPPPPPPPP T^T PLEASE ANSWER!!!!

Mathematics
1 answer:
likoan [24]2 years ago
5 0

Answer:

7 miles per hour.

Step-by-step explanation:

Right now, the relationship in the problem represents 3\frac{1}{2} miles in  hours. To find out what the unit rate is (number of miles per mile), we need to multiply both sides of the equation show BeLoW:

3\frac{1}{2} = \frac{1}{2}

7 miles = 1 hour

Therefore, Doug's average speed in miles per hour is 7 (7 miles per hour).

:3))

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Solve the system of equations by any method.<br><br><br><br> 5x+9y =16<br> x+2y =4
Alisiya [41]

Answer:

The system of equations has one solution at (-4, 4).

Step-by-step explanation:

We are given the system of equations:

\displaystyle\left \{ {{5x+9y=16} \atop {x+2y=4}} \right.

We can use elimination to solve this system. We need to multiply the second equation by -5 so we can cancel out our x-terms.

-5\times(x+2y=4) \rightarrow -5x - 10y = -20

Therefore, our system now becomes:

\displaystyle\left \{ {{5x+9y=16} \atop {-5x-10y=-20}} \right.

Now, we can add these two equations together and solve for y.

\displaystyle(5x + 9y) + (-5x - 10y) = 0 - y\\\\16 + (-20) = -4\\\\-y = -4\\\\\frac{-y}{-1}=\frac{-4}{-1}\\\\y = 4

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x+2(4)=4\\\\x + 8 = 4\\\\x = -4

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6 0
3 years ago
What is the volume of a cone with a radius of 4in and a height of 1ft
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notsponge [240]

Answer:

V=90

Step-by-step explanation:

<u>Step 1:  Find the volume of the cone</u>

<u />V = \frac{\pi *r^{2}*h}{3}

<u>Plug in the values</u>

<u />V = \frac{\pi *3^{2}*10}{3}

<u>Simplify and Solve</u>

<u />V = \frac{\pi *9*10}{3}

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V = \frac{90*3 }{3}

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Answer:  V=90

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 185553.7 feet^3

Step-by-step explanation:

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