4 years ago

Item 13 Solve y−2x=3y−2x=3 for yy.

Mathematics

1 answer:

skelet666 [1.2K]4 years ago

4 0

Y=9 and x=3, your welcome ;)

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(Solve.) I have 1/10 of a pie left over. My sister and I plan to share it equally. What fraction of the pie will each of us get?

AleksAgata [21]

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Explication:
Half of 1/10 is 1/20

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3 years ago

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What is the fraction 7/12 as a product of a whole number and a unit fraction

ivann1987 [24]

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Step-by-step explanation:

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3 years ago

a surveyor measures the distance to the two landmarks as shown in the diagram what is the distance d. between the landmarks

Inessa [10]

<h3>The distance between two landmarks is 123 meters</h3>

<em><u>Solution:</u></em>

We have to find the distance between two landmarks

<em><u>Use the law of cosines</u></em>

The third side of a triangle can be found when we know two sides and the angle between them

$c^2 = a^2 + b^2 - 2ab\ cos c$

Here, angle between 90 meters and 130 meters is 65 degrees

From figure,

a = 90

b = 130

c = d

Therefore,

$d^2 = 90^2 + 130^2 - 2(90)(130)\ cos 65\\\\d^2 = 8100 + 16900 - 23400\ cos\ 65\\\\d^2 = 25000 - 23400 \times 0.4226\\\\d^2 = 25000 - 9889.267\\\\d^2 = 15110.73\\\\d = 122.92\\\\d \approx 123$