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3 years ago

Can anyone answer this

Mathematics

2 answers:

solong [7]3 years ago

6 0

Answer:

B. 1395 sq. units

Step-by-step explanation:

A=2(1+ $\sqrt{2}$ )a²

A=2(1+ $\sqrt{2}$ )17²

A=2(1+ $\sqrt{2}$ )289

A≈4.83×289

A≈1395.87

A≈1395 units²

The option that fits this is B. 1395 sq. units

Yakvenalex [24]3 years ago

3 0

Answer:

B. 1395 sq. units

Step-by-step explanation:

Since the shape is an octagon, it is also composed of 8 triangles. If you solve the formula for the area of a triangle with those numbers and multiply it by the amount of sides you will have the total area.

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The height of a triangular window is 3 feet less than its base. The area the window is 20 ft.? find the dimensions of the window

Ivenika [448]

Let us assume base of the window = b feet.

Height is 3 feet less than base, that is = (b-3).

Given area of the triangle = 20 feet square.

We know formula for area of a triangle:

Area = $\frac{1}{2}$ × Base × Height

Plugging values in formula, we get

20 = $\frac{1}{2} b \times (b-3)$

$\mathrm{Multiply\:both\:sides\:by\:}2$

$40=b\left(b-3\right)$

$40=b^2-3b$

$b^2-3b-40=0$

Factoring quadratic, we get

$\left(b+5\right)\left(b-8\right)$ =0

b+5=0

b=-5

b-8=0

b=8.

For base we can take only positive value.

<h3>Therefore, base of the triangle = 8 feet and height = 8 -3 = 5 feet.</h3>

6 0

3 years ago

For Xavier's lemonade recipe, 6 lemons are required to make 4 cups of lemonade. At what rate are lemons being used in cups of le

dusya [7]

Answer:

Since 6 lemons are used to make 4 cups of lemonade, then are used $\frac{6}{4} =\frac{3}{2}$ of lemon per cup of lemonade, or are make $\frac{4}{6}=\frac{2}{3}$ cups of lemonade per lemon.