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2 years ago

Plzz help in 3rd part of question 3

Mathematics

1 answer:

ASHA 777 [7]2 years ago

7 0

Answer:

X=28/9, Y=7/5

Step-by-step explanation:

By using Elimination method

Multiply equation 1 by 9 and equation 2 by 3/2

<h2>There you get those values listed above for x and y</h2>

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PLEASE PLEASE ANSWER!

muminat

The area of the shaded region is $$8(\pi \ -\sqrt{3})\ \text{cm}^2$ .

Solution:

Given radius = 4 cm

Diameter = 2 × 4 = 8 cm

Let us first find the area of the semi-circle.

Area of the semi-circle = $\frac{1}{2}\times \pi r^2$

$$=\frac{1}{2}\times \pi\times 4^2$

$$=\frac{1}{2}\times \pi\times 16$

Area of the semi-circle = $$8\pi$ cm²

Angle in a semi-circle is always 90º.

∠C = 90°

So, ABC is a right angled triangle.

Using Pythagoras theorem, we can find base of the triangle.

$AC^2+BC^2=AB^2$

$AC^2+4^2=8^2$

$AC^2=64-16$

$AC^2=48$

$AC=4\sqrt{3}$ cm

Base of the triangle ABC = $4\sqrt{3}$ cm

Height of the triangle = 4 cm

Area of the triangle ABC = $\frac{1}{2}\times b \times h$

$$=\frac{1}{2}\times 4\sqrt{3} \times 4$

Area of the triangle ABC = $8\sqrt{3}$ cm²

Area of the shaded region

= Area of the semi-circle – Area of the triangle ABC

= $$8\pi \ \text{cm}^2-8\sqrt{3}\ \text{cm}^2$

= $$8(\pi \ -\sqrt{3})\ \text{cm}^2$

Hence the area of the shaded region is $$8(\pi \ -\sqrt{3})\ \text{cm}^2$ .

3 0

2 years ago

What is the length of the unknown leg in the right triangle? 22 32 104 194

Rus_ich [418]

Answer:

Your answer would be B.

Step-by-step explanation:

a^2 + 9^2 = 113^2

Solve exponents.

A^2 + 81 = 113

Subtract 81 from each side.

A^2 = 32.

Square root each side.

A = 32

Hope this helps & good luck!

Feel free to message me if you need more help! :)

7 0

2 years ago

Anyone can help me with this math question?

Gennadij [26K]

Answer:

1,890 feet

Step-by-step explanation:

2 inches=30 feet

4.2 inches= 63 feet

63ft x 30 ft= 1,890ft

8 0

2 years ago

Please help me out, i’ll mark brainliest!!

Novay_Z [31]

College............................

4 0

2 years ago

Use the drop-down menus to describe the key aspects of the function f(x) = –x2 – 2x – 1.

Aliun [14]

Answer:

vertex is the (maximum value)

function is increasing (when x<-1)

function is decresing (when x>-1)

domain of the function is (all real numbers)

range of the function is (all numbers less than or equal to 0)

Step-by-step explanation:

just did the assignment.

4 0

2 years ago

Plzz help in 3rd part of question 3​

Plzz help in 3rd part of question 3