All categories

3 years ago

14x + 6 = 2(5+7x) please help me

Mathematics

1 answer:

Vsevolod [243]3 years ago

5 0

Answer:

14x+6= 10+14x

14x-14x= 10-6

x= 4

Step-by-step explanation:

x= 4

You might be interested in

What is the solution for 9 > x - 7?

vodka [1.7K]

Answer:

Step-by-step explanation:

9 > x - 7

+7 +7

16 > x

The answer is C.

6 0

3 years ago

Which is greater 7500,000 m or 750 km

marta [7]

Step-by-step explanation:

both are equal

pls Mark brainliest

5 0

3 years ago

a circle has a center (3,5) and a diameter AB. The coordinates of A are (-4,6). what are the coordinates of B?

Kruka [31]

Find the length of the radius.

$r= \sqrt{(3-(-4))^2+(5-6)^2}
\\r = \sqrt{7^2+(-1)^2}
\\r= \sqrt{50} 
\\ r=5 \sqrt{2}$

Find the length of the diameter.

d = 2r = 2 × 5√2 = 10√2

Point B must lie on a line AC, where C is a center of a circle.
Find equation of line AC.
A(–4, 6), C(3, 5)

$y-y_1= \frac{y_2-y_1}{x_2-x_1}(x-x_1)
\\y-6= \frac{5-6}{3-(-4)} (x-(-4))
\\y-6=- \frac{1}{7} (x+4)
\\7y-42=-x-4
\\x+7y-38=0$

The distance from B(x, y) to C(3, 5) is 5√2.
$\sqrt{(x-3)^2+(y-5)^2}=5 \sqrt{2} 
 \\(x-3)^2+(y-5)^2=(5 \sqrt{2})^2 
\\(x-3)^2+(y-5)^2=50$

Solve system of equations.
$x+7y-38=0
\\(x-3)^2+(y-5)^2=50
\\
\\x=38-7y
\\(38-7y-3)^2+(y-5)^2=50
\\(35-7y)^2+(y-5)^2=50
\\1225-490y+49y^2+y^2-10y+25-50=0
\\50y^2-500y+1200=0
\\y^2-10y+24=0
\\y^2-6y-4y+24=0
\\y(y-6)-4(y-6)=0 \\(y-6)(y-4)=0 \\y_1=6,y_2=4
$

$x_1=38-7y_1=38-7 \times 6 = 38-42=-4
\\x_2=38-7y_2=38-7 \times 4 = 38-28=10
$

Point B could have coordinates
$\\
\\(x_1,y_1)=(-4,6),(x_2,y_2)=(10,4)
$

But (–4, 6) are the coordinates of point A.
Therefore, point B has coordinates (10,4).

8 0

3 years ago

Which represents the empirical formula for A3B9?<br> AB3<br> AB2<br> A3B9<br> A9B27

DaniilM [7]

Answer:

$AB_{3}$

Step-by-step explanation:

Given : $A_{3}B_{9}$

To Find : Which represents the empirical formula for $A_{3}B_{9}$ ?

Solution:

Definition of Empirical Formula - A formula that gives the simplest whole-number ratio of atoms in a compound.

$A_{3}B_{9}$

To reduce it in simplest form

Divide the subscript numbers by 3

So, the resultant : $AB_{3}$

Thus the empirical formula for $A_{3}B_{9}$ :

$AB_{3}$

5 0

3 years ago

Read 2 more answers

the table shows the name of each volunteer and the height of the baby elephant each volunteer measured. which volunteer measured

daser333 [38]

So in order to compare, the measurements have to same units. So lets convert everything to feet.

George 2 yds = 6 ft Kelsey 68 inches = 5 ft 8"

Mariah 5 feet Brian 5 ft 10 "

George measured the tallest at 6'

Hope this helped.

4 0

3 years ago