All categories

2 years ago

Twice a number, added to seven, is the same

Mathematics

1 answer:

eduard2 years ago

6 0

Answer:

Your number is -10

Hope this helps :)

Step-by-step explanation:

Let x be the number

Twice a number is 2x

Added to 7 means + 7 so 2x + 7

Is means =

2x+7=

At this point I have to assume you mean

"is the same as three subtracted from THE SAME number"

Otherwise, rather than a number, we end up with the

equation of a line....

2x + 7 = x - 3 subtract x from both sides

x + 7 = -3 subtract 7 from both sides

x = -10

Your number is -10

Check: 2x+7 = x-3

2(-10) + 7 = -10-3

-20+7 = -13

-13 = -13

The answer fits the parameters of the problem.

You might be interested in

Find the area of the shaded regions: the green is the shaded area

algol13

Answer:

the green area stands for the safe operation space

Step-by-step explanation:

u say b×h meaning say 80degrees ×9cm which is 720..

7 0

2 years ago

An amusement park charges admission plus a fee for each ride. Admission plus 2 rides costs $10. Admission plus five rides costs

LenaWriter [7]

Answer:

The charge for admission is $6 and the charge for each ride is $2

Step-by-step explanation:

Let

x ----> the charge for admission

y ----> the charge for each ride

we have that

$x+2y=10$ -----> equation A

$x+5y=16$ -----> equation B

Solve the system by elimination

Subtract equation B from equation A

$x+2y=10\\-(x+5y)=-16\\---------\\2y-5y=10-16\\-3y=-6\\y=2$

Find the value of x

substitute the value of y in any equation

$x+2(2)=10$

$x+4=10$

$x=10-4$

$x=6$

therefore

The charge for admission is $6 and the charge for each ride is $2

8 0

2 years ago

The intensity of a sound varies inversely where of its distance from the source at a distance of 1 meter the intensity of a jet

xz_007 [3.2K]

Answer:

1/250 W/m² or 0.004 W/m² or 4 mW/m²

Step-by-step explanation:

The cargo worker is (50 m)/(1 m) = 50 times the reference distance. The intensity varies as the inverse of the square of the distance, so will be ...

(1/50)²×(10 W/m²) = 10/2500 W/m² = 1/250 W/m²

This might be more conveniently written as 4 mW/m².

4 0

2 years ago

Please give answer..

Phantasy [73]

Answer: The correct answer is <em>-x+3y=6</em>

Step-by-step explanation:

<u>Solve for x:</u>

y=1/3x+2

1) Flip the equation:

1/3x+2=y

2) Add -2 to both sides:

1/3x+2+−2=y+−2

1/3x=y−2

3) Divide both sides by 1/3:

(1/3x)/(1/3)=(y−2)/(1/3)

x=3y−6

In standard form (Ax=By=C): -x+3y=6

6 0

8 months ago

A cubic box that holds 125 units

love history [14]

Answer: more info

Step-by-step explanation:

5 0

3 years ago