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3 years ago

Mrs. Via needs to buy

Mathematics

1 answer:

omeli [17]3 years ago

4 0

Answer:

Step-by-step explanation:

Via needs 2 1/2 bags of grass seed

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A scale drawing of an apartment shows the living room length as 5.7 inches. The scale on the drawing is 1 inch = 3 feet. What is

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Answer:

Step-by-step explanation:

Scale drawing = 5.7 inches

scale = 1 inches = 3 feet

If 1 inches = 3 feet

5.7 inches = $x$ feet

solving for $x$ , we cross-multiply

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3 years ago

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A triangle has two sides measuring 16 and 21. The included angle is 116°. What is the length of the side opposite the 116° angle

Crank

Answer:

Length of the side opposite to angle $116^{\circ}$ is 31.49

Step-by-step explanation:

Included angle can be defined as the angle in between two sides of the triangle.

So angle $116^{\circ}$ is in between sides 16 and 21.

Refer to the attachment for triangle diagram.

To find the length of opposite side, use cosine rule as follows

$a^{2}=b^{2}+c^{2}-2\:b\:c\cos\left(A\right)$

From the diagram, $b = 21,c = 16,\angle A=116^{\circ}$

Substituting the values in the formula,

$a^{2}=\left(21\right)^{2}+\left(16\right)^{2}-2\left(21\right)\left(16\right)\cos\left(116\right)$

Simplifying,

$a^{2}=441+256-225792\left(-0.44\right)$

$a^{2}=991.59$

Taking square root on both sides,

$\sqrt{a^{2}}=\sqrt{991.59}$

$a=31.49$

Therefore length of third side is 31.49

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