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3 years ago

Mr. White can walk 3 miles in 45 minutes. How far can he walk in 1 hour

Mathematics

2 answers:

ioda3 years ago

7 0

Answer:

i hyave no clu

Step-by-step explanation:

abh

Alexeev081 [22]3 years ago

7 0

Answer:

Mr. White can walk 4 miles in 1 hour.

Step-by-step explanation:

If Mr. White can walk 3 miles in 45 minutes, we can assume that he can walk 1 mile in 15 minutes. From this, we can conclude that Mr. White can walk 4 miles in 1 hour. There are 60 minutes in 1 hour, and 15 goes into 60 four times.

I hoped this helped! If it did, please feel free to rate and press thanks! Have a great day!

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choose the equation below that represents the line that passes through the point (−2, −1) and has a slope of 5. (5 points) y − 1

Rus_ich [418]

Equation of a line;
y=mx+c
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3 years ago

a circle has a center (3,5) and a diameter AB. The coordinates of A are (-4,6). what are the coordinates of B?

Kruka [31]

Find the length of the radius.

$r= \sqrt{(3-(-4))^2+(5-6)^2}
\\r = \sqrt{7^2+(-1)^2}
\\r= \sqrt{50} 
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Find the length of the diameter.

d = 2r = 2 × 5√2 = 10√2

Point B must lie on a line AC, where C is a center of a circle.
Find equation of line AC.
A(–4, 6), C(3, 5)

$y-y_1= \frac{y_2-y_1}{x_2-x_1}(x-x_1)
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The distance from B(x, y) to C(3, 5) is 5√2.
$\sqrt{(x-3)^2+(y-5)^2}=5 \sqrt{2} 
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\\(x-3)^2+(y-5)^2=50$

Solve system of equations.
$x+7y-38=0
\\(x-3)^2+(y-5)^2=50
\\
\\x=38-7y
\\(38-7y-3)^2+(y-5)^2=50
\\(35-7y)^2+(y-5)^2=50
\\1225-490y+49y^2+y^2-10y+25-50=0
\\50y^2-500y+1200=0
\\y^2-10y+24=0
\\y^2-6y-4y+24=0
\\y(y-6)-4(y-6)=0 \\(y-6)(y-4)=0 \\y_1=6,y_2=4
$

$x_1=38-7y_1=38-7 \times 6 = 38-42=-4
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$

Point B could have coordinates
$\\
\\(x_1,y_1)=(-4,6),(x_2,y_2)=(10,4)
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But (–4, 6) are the coordinates of point A.
Therefore, point B has coordinates (10,4).

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3 years ago

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GuDViN [60]

Answer:

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Step-by-step explanation:

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2 years ago