I need help to fine the statement that is true

Mathematics

1 answer:

lisabon 2012 [21]3 years ago

6 0

Answer:

option A

Step-by-step explanation:

wx and zy making 90 angle with each other therefore they are perpendicular.

wx and ab making 0 angle with each other therefore they are parallel

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Cos(2theta)=11 sin(theta)-5

lubasha [3.4K]

$\cos2\theta=11\sin\theta-5$
$1-2\sin^2\theta=11\sin\theta-5$
$2\sin^2\theta+11\sin\theta-6=0$
$(2\sin\theta-1)(\sin\theta+6)=0$
$\implies\begin{cases}2\sin\theta-1=0\\\sin\theta+6=0\end{cases}$

The second equation gives $\sin\theta=-6$ , but $-1\le\sin\varphi\le1$ for any real $\varphi$ , so we can ignore this equation.

This leaves us with

$2\sin\theta-1=0\implies \sin\theta=\dfrac12\implies\theta=\dfrac\pi6+2\pi k,\theta=\dfrac{5\pi}6+2\pi k$

where $k$ is any integer.

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3 years ago

In terms of x, find an expression that represents the area of the shaded region. The outer square has side lengths of (x+5) and

VLD [36.1K]

The area of the outer square = (x+5)² = x² + 10x + 25

The area of the inner square = (x-2)² = x² - 4x + 4

The area of the shaded region = (x² + 10x + 25) - (x² - 4x + 4)
= x² + 10x + 25 - x² + 4x - 4
= 14x + 21 square units

6 0

3 years ago

Avery is renting a car and needs to compare the prices of two car rental companies. Hertz charges $42 per day and an additional

Stels [109]

Answer:

A) Hertz: 42x+32=y

Enterprise: y=46x+24

B) Hertz is less by 16 $; 300$ minus 386$

C)16$

D) 9$

Step-by-step explanation:

7 0