HOW DO I FIND QR<br><br> PLEASE HELP

alisha [4.7K]

Answer: The answer is 9

6 0

2 years ago

Given the vectors A⃗ and B⃗ shown in the figure ((Figure 1) ), determine the magnitude of B⃗ −A⃗. A is 28 degrees above the posi

Vlad [161]

This problem is represented in the Figure below. So, we can find the components of each vector as follows:

$\bullet \ cos(28^{\circ})=\frac{Adjacent}{Hypotenuse}=\frac{A_{x}}{44} \\ \\ \therefore A_{x}=44cos(28^{\circ})=38.85m \\ \\ \\ \bullet \ sin(28^{\circ})=\frac{Opposite}{Hypotenuse}=\frac{A_{y}}{44} \\ \\ \therefore A_{y}=44sin(28^{\circ})=20.65m$

$\bullet \ cos(56^{\circ})=\frac{Adjacent}{Hypotenuse}=\frac{-B_{x}}{26.5} \\ \\ \therefore B_{x}=-26.5cos(56^{\circ})=-14.81m \\ \\ \\ \bullet \ sin(56^{\circ})=\frac{Opposite}{Hypotenuse}=\frac{B_{y}}{26.5} \\ \\ \therefore B_{y}=26.5sin(56^{\circ})=21.97m$

Therefore:

$\vec{A}=(38.85, 20.65)m \\ \\ \vec{B}=(-14.81, 21.97)m$

So:

$\vec{B}-\vec{A}=(-14.81, 21.97)-(38.85, 20.65)=(-53.66,1.32)$

Finally, the magnitude is:

$\boxed{\left| \vec{B}-\vec{A}\right|=\sqrt{(-53.66)^2+(1.32)^2}=53.67m}$

7 0

3 years ago

Read 2 more answers

What is the Percentage of 23000?

tankabanditka [31]

Answer: 0.00435 If you do it by one.

0.0087 if you do it by two. And-

0.01304 if you do it by three.

I really hope this helps have a good day :)) (pls make brainliest im trying to each a goal!)

Step-by-step explanation:

3 0

3 years ago

Write the Quadratic Formula

Evgen [1.6K]

Answer:

$y=x^2-4$

Step-by-step explanation:

we know that

The function of the graph is a vertical parabola open upward

The vertex is a minimum

The equation of a vertical parabola in vertex form is equal to

$y=a(x-h)^2+k$

where

a is a coefficient

(h,k) is the vertex

In this problem

Looking at the graph

The vertex is the point (0,-4)

substitute

$y=a(x-0)^2-4$

$y=ax^2-4$

To determine the value of "a" take a point in the graph

I take the point (3,5)

substitute the value of x and the value of y and solve for a

$5=a(3)^2-4\\9a=5+4\\9a=9\\a=1$

therefore

The equation of the quadratic function is

$y=x^2-4$

3 0

3 years ago

Pl help me to do it

mixas84 [53]

Answer:

Step-by-step explanation:

Assuming you want to find the value of n.

$\sqrt{\frac{p}{q} } =(\frac{q}{p}) ^{1-2n} \\$

Remember when bases are same exponents can be made equal

Here the bases are different

because notice on one side there is p/q and on the other q/p

what can we do to make them same?

You can invert the any side you want either make leftside as q/p or make right one as p/q

I will make left side as q/p

All you do is flip the denominator and numerator to do so. But that can only be done if you put a (-1) in the exponent

so underroot p/q means (p/q)^1/2 when i make it q/p

a negative one needs to be put in the exponent. That -1 when multiplied by 1/2 makes it -1/2

Now the bases are same such like.

$(\frac{q}{p} )^{-1/2} = (\frac{q}{p}) ^{1-2n}$

See now the bases are same, the powers can be made equal

so

-1/2=1-2n

here n is the variable we need to find

rearrange the equation

n=3/4

3 0

3 years ago

HOW DO I FIND QR PLEASE HELP