3 years ago

What is -2 2/3 • -4 3/7

Mathematics

1 answer:

Tanya [424]3 years ago

5 0

Answer:

11 17/21

Step-by-step explanation:

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Using the following triangle, write a proof to verify that sinA/a=sinC/c

Sliva [168]

Answer:

Proved: $c\sin A=a\sin C\Rightarrow \frac{\sin A}{a}=\frac{\sin C}{c}$

Step-by-step explanation:

Given: A triangle

To prove: $\frac{\sin A}{a}=\frac{\sin C}{c}$

Solution:

Trigonometry is a branch of mathematics that explains relationship between sides and angles of the triangle.

Sine of angle = side opposite to the angle / hypotenuse

In ΔADB,

$\sin A=\frac{BD}{AB}=\frac{h}{c}\\\Rightarrow h=c\sin A\,\,\,(i)$

In ΔBDC,

$\sin C=\frac{BD}{BC}=\frac{h}{a}\\\Rightarrow h=a\sin C\,\,\,(ii)$

From equations (i) and (ii),

$c\sin A=a\sin C\\\frac{\sin A}{a}=\frac{\sin C}{c}$

Hence proved

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2 years ago

What is the image of (-1, 1) after a dilation of 2? (1,3) (-2, 2) (2, 2)

Amanda [17]

The answer is b. (-2,2)

Since it is a dilation of 2, multiply each number by 2.

-1*2=-2
1*2=2

So after the dilation, it would be (-2,2)

5 0

3 years ago

Factorise : 17px-51py

Tcecarenko [31]

Answer:

You just have to look for common. The common thing is 17 and p so take that out from brackets. Thus 17p(x-3y)  is the factorised form of the expression.

pls give brainliest for the answer

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2 years ago

Death Valley is the location of the lowest land elevation in the USA which is 282 feet below sea level.The location with the hig

il63 [147K]

Answer:

20,038

Step-by-step explanation:

20,320 - 282

7 0

2 years ago

Solve x^2 - x - 5/2 = 0 using the quadratic formula.

Soloha48 [4]

Using the quadratic formula, we have:

$\frac{1+- \sqrt{11} }{2}$ , so our solutions are $\frac{1+ \sqrt{11} }{2}$ and $\frac{1- \sqrt{11} }{2}$ .

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3 years ago