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77julia77 [94]
4 years ago
11

A map using the scale of 3/4 of an inch to aubergine 3 miles if the actual distance between two cities is 25 miles then what is

the length on the map
Mathematics
1 answer:
mafiozo [28]4 years ago
4 0

Answer:

6.25 inches

Step-by-step explanation:

3/4 inches = 0.75 inches

If 0.75 inches is the map's scale for 3 miles, then:

0.75 inches / 3 miles = 0.25 inches per 1 mile

Multiply 0.25 inches inches per mile * 25 miles:

0.25 * 25 = 6.25 inches

OR:

0.75/3 = x/25

Multiply 25 by both sides:

x = (0.75/3)*25

x = 6.25 inches

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If line segment RU is considered the base of parallelogram RSTU, what is the corresponding height of the parallelogram?
klasskru [66]
Given that line segment RU with vertices R(1, 1) and U(4, 5) is considered the base of parallelogram RSTU.

Then, the line segment ST with vertices S(7, 0) and T(10, 4) is the top of the parallelogram.

The corresponding height of the parallelogram is the length of a line with endponts at RU and ST and perpendicular to both RU and ST.

The equation of the line segment RU is given by
\frac{y-1}{x-1} = \frac{5-1}{4-1} = \frac{4}{3}  \\  \\ 3(y-1)=4(x-1) \\  \\ 3y-3=4x-4 \\  \\ 3y=4x-1 \\  \\ y= \frac{4}{3} x- \frac{1}{3}

Recall that given that two lines are perpendicular, the product of the slope of the two lines is -1.
Let the slope of the line perpendicular to line RU be m, then
\frac{4}{3} m=-1 \\  \\ m=- \frac{3}{4}

Thus, the equation of the line perpendicular to RU passing through point (1, 1) is given by
y-1=- \frac{3}{4} (x-1) \\  \\ 4(y-1)=-3(x-1) \\  \\ 4y-4=-3x+3 \\  \\ 4y=-3x+7 \\  \\ y=- \frac{3}{4} x+ \frac{7}{4}

The equation of the line segment ST is given by
\frac{y-0}{x-7} = \frac{4-0}{10-7} = \frac{4}{3}  \\  \\ 3y=4(x-7)=4x-28 \\  \\ y= \frac{4}{3} x- \frac{28}{3}

The line perpendicular to line segment RU intersected line segment ST at the point given by
- \frac{3}{4} x+ \frac{7}{4}=\frac{4}{3} x- \frac{28}{3} \\  \\ \frac{4}{3} x+\frac{3}{4} x=\frac{7}{4}+\frac{28}{3} \\  \\  \frac{25}{12} x= \frac{133}{12}  \\  \\ x= \frac{133}{25}  \\  \\ y=\frac{4}{3} \left(\frac{133}{25}\right)- \frac{28}{3}= -\frac{56}{25}

Thus, the corresponding height of the parallelogram is the line with endpoints
(1,1) \ and \ \left(\frac{133}{25},-\frac{56}{25}\right)

Recall that the length of a line passing through points
(x_1,y_1) \ and \ (x_2,y_2)
is given by
l= \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}

Thus, the length of the line passing through points
(1,1) \ and \ \left(\frac{133}{25},-\frac{56}{25}\right)
is given by
l= \sqrt{\left(\frac{133}{25}-1\right)^2+\left(-\frac{56}{25}-1\right)^2}  \\  \\ = \sqrt{\left( \frac{108}{25}\right)^2+\left(- \frac{81}{25} \right)^2}= \sqrt{ \frac{11,664}{625} + \frac{6,561}{625} }  \\  \\ = \sqrt{ \frac{729}{25} } = \frac{27}{5} =5.4

Therefore, <span>the corresponding height of the given parallelogram is 5.4 units</span>
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Answer:

1

Step-by-step explanation:

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Answer:

g=2

Step-by-step explanation:

2 − (7g − 3) = -9

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2 − (7g − 3)-2 = -9-2

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Multiply by -1

− (7g − 3)*-1 = -11*-1

7g − 3 = 11

Add 3 to each side

7g-3+3 = 11+3

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Divide by 7

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Step-by-step explanation:

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Answer:

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BODMAS

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=  {( - 2)}^{2}  - 30 \div 5 \times 6 + 2 \\  = 4 - 30 \div 5 \times 6 + 2

then let's divide:

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