All categories

3 years ago

2/3x-5=7 how to find x

Mathematics

2 answers:

My name is Ann [436]3 years ago

6 0

Is the x
$\frac{2}{3x}$
Or
$( \frac{2}{3} )x$
Because placement is important

Simora [160]3 years ago

4 0

X=8 2/3(8)-5=7 3x8=24 24/2=12 12-5=8

You might be interested in

If Vector u=(5,-7) and v=(-11,3), 2v-6u=_____ and ||2v-6u||≈_____

Sauron [17]

<h2>Answer:</h2>

$2\vec{v}-6\vec{u}=(-52,48) \\ \\ ||2\vec{v}-6\vec{u}||=75.28}$

<h2>Step-by-step explanation:</h2>

In this problem we have two vectors:

$\vec{u}=(5,-7) \ and \ \vec{v}=(-11,3)$

So we need to find two things:

$2\vec{v}-6\vec{u}$

and:

$||2\vec{v}-6\vec{u}||$

FIRST:

In this case we have the multiplication of vectors by scalars. A scalar is a simple number, so:

$2\vec{v}-6\vec{u} \\ \\ Replace \ \vec{v} \ and \ \vec{u} \ by \ the \ given \ vectors: \\ \\ 2(-11,3)-6(5,-7) \\ \\ Multiply \ each \ component \ by \ the \ corresponding \ scalar:\\ \\ (2\times (-11),2\times 3)+(-6\times 5,-6\times (-7)) \\ \\ (-22,6)+(-30,42) \\ \\ Sum \ of \ vectors: \\ \\ (-22-30,6+42) \\ \\ \therefore \boxed{(-52,48)}$

SECOND:

If we name:

$\vec{w}=2\vec{v}-6\vec{u}$

Then, $||2\vec{v}-6\vec{u}||$ is the magnitude of the vector $\vec{w}$ . Therefore:

$||\vec{w}||=||2\vec{v}-6\vec{u}|| \\ \\ ||\vec{w}||=||(-52,48)|| \\ \\ ||\vec{w}||=\sqrt{(-58)^2+48^2} \\ \\ ||\vec{w}||=\sqrt{3364+2304} \\ \\ ||\vec{w}||=\sqrt{5668} \\ \\ \boxed{||\vec{w}||=75.28}$

5 0

2 years ago

Read 2 more answers

How to write 4(4*10^5) in scientific notation

Ne4ueva [31]

Answer:

16,000,000

Step-by-step explanation:

to start off your going to need to use PEMDAS (parenthesis exponents multiplication division addition subtraction)

so we are going to start IN the parenthesis the next step is doing the exponents so its going to look like this 1,000,000

rewrite the problem: 4(4×1,000,000)

use the next step in PEMDAS multiplication rewrite the problem:

4(4,000,000)

multiply: 16,000,000

3 0

2 years ago

You drive 8 miles from your house to your friend's house. Your house is at an elevation of 240 feet. Your friend's house is at a

dedylja [7]

(680 - 240) / 8 = 440/8 = 55 ft per mile

7 0

3 years ago

Write the equation of the line that passes through (0,5) and is perpendicular to the line x = 3.

Alona [7]

Answer:

(0,5)x3=(15,5)

Step-by-step explanation:

3 0

2 years ago

What is the value of H

never [62]

Answer:

h = 55

Step-by-step explanation:

the sum of the 3 angles in a triangle = 180°

the 2 unknown interior angles = 180 - 2h ( straight angle ), hence

the sum of the 3 angles

180- 2h + 180 - 2h + 40 = 180

400 - 4h = 180 ( subtract 400 from both sides )

- 4h = - 220 ( divide both sides by - 4 )

h = 55

6 0

3 years ago