2(x-5)=4x+7
solve for x

[1]   4x - 2y + 3z = 1

[2]   x + 3y - 4z = -7

[3]   3x + y + 2z = 5

Add -4 [2] to [1], and add -3 [2] to [3] to eliminate x :

-4 (x + 3y - 4z) + (4x - 2y + 3z) = -4 (-7) + 1

-4x - 12y + 16z + 4x - 2y + 3z = 28 + 1

[4]   -14y + 19z = 29

-3(x + 3y - 4z) + (3x + y + 2z) = -3 (-7) + 5

-3x - 9y + 12z + 3x + y + 2z = 21 + 5

-8y + 14z = 26

[5]   -4y + 7z = 13

Add 2 [4] to -7 [5] to eliminate y :

2 (-14y + 19z) - 7 (-4y + 7z) = 2 (29) - 7 (13)

-28y + 38z + 28y - 49z = 58 - 91

-11z = -33

z = 3

Plug this into either [4] or [5] to solve for y :

-4y + 7 (3) = 13

-4y + 21 = 13

-4y = -8

y = 2

Plug both of these solutions into either of [1], [2], or [3] to solve for x :

x + 3 (2) - 4 (3) = -7

x + 6 - 12 = -7

x = -1

Answer:

(-11 + √165) / 22

Step-by-step explanation:

∑₂°° (1 + c)⁻ⁿ

= ∑₂°° (1 / (1 + c))ⁿ

= ∑₁°° (1 / (1 + c))ⁿ⁺¹

This is a geometric series with a₁ = 1/(1+c)² and r = 1/(1+c).

The sum of an infinite geometric series is:

S = a₁ / (1 − r)

Therefore:

11 = 1/(1+c)² / (1 − 1/(1+c))

11 = 1 / ((1+c)² − (1+c))

11 ((1+c)² − (1+c)) = 1

11 (1 + 2c + c² − 1 − c) = 1

11 (c + c²) = 1

11c² + 11c − 1 = 0

c = [ -11 ± √(11² − 4(11)(-1)) ] / 22

c = (-11 ± √165) / 22

c cannot be between -2 and 0, so c = (-11 + √165) / 22.

Step-by-step explanation:

there is 3 feet in a yard

divide by 3

18 ÷ 3 = 6

true

Answer:

75 (5r + 3d + 4f)

Step-by-step explanation:

I hope this helps!

Answer:

7

Step-by-step explanation:

It's seven because If you take 9 you just have to find the number that adds up to sixteen so in that case 6+9=16

Answer:

60

Step-by-step explanation:

Taking the LCM of 3, 4, 5 and 6 leaves us with;

LCM = 1 * 2 * 3 * 2 * 5

       = 60

Since Dividing 60 by 7 leaves quotient 8 and remainder 4,

We know that we've found the number we're looking for.

Answer:

-2 is a solution

Step-by-step explanation:

-2-5<8

-7<8

Answer:

-2 is a solution.

Step-by-step explanation:

negative 2 minus 5 is less than 8

negative 7 is less than 8

Answer:y = mx + b

(–6) = (4)(–1) + b

–6 = –4 + b

–2 = b

Step-by-step explanation:

Answer:

108.90

Step-by-step explanation:

To find its price before the increase you say:

10% of 121 then the answer you subtract it from 121:

10 / 100 * 121 = 12.10

Then subtract 12.10 from 121

121-12.10= 108.90

So the price before the increase was 108.90

HOPE IT HELPED

Answer:

hey

Step-by-step explanation:

Answer: Its A) 1 ; 3.7

Step-by-step explanation:i just took the practice on edge 2020

Answer:

Red is sus

Step-by-step explanation:

Answer: naah i think brown is sus he faked electrical vote him out

Step-by-step explanation:

Answer:

The product is 700

Step-by-step explanation:

I just multiplied them If it correct plz give me brainliest thanks :)

Answer:

x=16

Step-by-step explanation:

50+40=90

40-8=32

32/2=16

x=16

Answer:

x=16

Step-by-step explanation:

since it is a right triangle it is 90 degrees so 90-50-40

than do 40=8+2x and solve for x which is 16 :)

Answer:

Step-by-step explanation:

Answer:

51 Magmortars!!!

Step-by-step explanation:

Hope this helps!!!

Answer:

you have 51

Step-by-step explanation:

if you have 50 and you get 1 more then your adding so you would do this

50+1=51

Answer: This means 38% of the large square is shaded. Incorrect. There are 62 small unshaded squares out of the 100 in the large square, so the percent of the large square that is unshaded is 62%.

...

Example

Problem What percent of the grid is shaded?

Answer 23% of the grid is shaded.

2 more rows

Answer:

The answer is 90

Step-by-step explanation:

Since the shaded part fills in about 3/4 of the diagram, percent multiplied to be 100. please mark me brainliest

El máximo común divisor es 12

Por cierto, hablo inglés, así que estoy usando Google Translat. :)

Answer: 22.34375

Step-by-step explanation:

35 and 3/4 is equal to 35.75

Therefore,

35.75 x (3/8) is equal to 13.40625 underground.

So 35.75 - 13.40625 = 22.34375 feet above ground

Answer:

2280

Step-by-step explanation:

Multiply 5 times 2325 it ain't that hard g just use google lol

Answer:

least to greatest: 1/3, sqrt 1, sqrt 2, 2.5

Step-by-step explanation:

sqrt 1 = 1

sqrt 2 = 1.41421356237 = 1.4

1/3 = 0.33

2.5 = 2.5

Answer:

X = 4x-18

Step-by-step explanation:

X = “a number”^^

Answer:

0.833...

(3's are infinite)

Answer:

0.08333333333

.Step-by-step explanation:

0.5 divided by 6=0.08333333333

rounded: 0.083repeating

Answer:

The constant of proportionality is the constant value of the ratio of two proportional quantities x and y, typically the equation is Y=KX.

Step-by-step explanation:

Answer:

the answer is 27

i did this by doing 6 x 2 which is 12 so i then did 16 - 12 which is 4 then i add the 2 in it which is 42 i then did 6 x 7 which is 42 and thats 0

this is my statement and i did this on paper and got this right!

Answer:

27

Step-by-step explanation:

See photo below

Answer:

hello your question has some missing part and the table as it relates better to the question

set up the ANOVA table ( to 1 decimal if necessary )

Step-by-step explanation:

attached below is the image of the Analysis of variance using Minitab software

Attached below as well is the Require Anova table

Answer:

The answer is 1/6

Step-by-step explanation:

This is the answer due to the fact that a dice has 6 sides meaning there is a 1 in 6 chance of rolling the different numbers

Answer:

[tex]the \: proberbility \: is \: \frac{2}{6} = \frac{1}{3} [/tex]