All categories

2 years ago

Solve for x. -9x - 9 = x + 21

Mathematics

2 answers:

Nataly_w [17]2 years ago

6 0

Answer:

x=-3

Step-by-step explanation:

Original equation: -9x-9 = x+21

Add 9 to both sides: -9x=x+30

Subtract x from both sides: -10x=30

Divide by -10 on both sides: x=-3.

Let me know if this helps!

gregori [183]2 years ago

3 0

Answer:

x = -3

Step-by-step explanation:

1. add 9 to both sides -9x-9+9=x+21+9

2. simplify -9x=x+30

3. subtract x from both sides -9x-x=x+30-x

4. simplify -10x=30

5. divide both sides by -10 -10x/-10 = 30/-10

simplify and you're done!

You might be interested in

(-6, -2) & (-8,-6)<br> what’s the slop?

nevsk [136]

Answer:

The slope is 2.

Step-by-step explanation:

1. To find the slope between 2 points, always use:

$\frac{Y_{2} - Y_{1}}{X_{2} - X_{1}}$

2. Plug in the coordinates:

$\frac{-6 + 2}{-8 + 6}$

3. Simplify:

$\frac{-4}{-2}$ = $2$

4 0

3 years ago

Which represents the polynomial below written in standard form?

STALIN [3.7K]

Answer:

B. $4x^3}+\frac{x^2}{2}-3x+6$

Step-by-step explanation:

The polynomial is $\frac{x^2}{2}-3x+4x^3}+6$

To write in Standard form, the greatest exponent goes first, down to the least.

The greatest exponent is 3, so $4x^3$ goes first.

$4x^3}+\frac{x^2}{2}-3x+6$ is what you end up with

6 0

2 years ago

Read 2 more answers

James deposited $575 into a bank account that earned 5.5% simple interest each year. If no money was deposited into or withdrawn

Usimov [2.4K]

I=prt,,i=575*0.055*2,,i=63.25 total interest then A=p+i,,a=575+63.25,,A=638.25 the answer

5 0

3 years ago

Read 2 more answers

HiCan you please state the Pythagorean TheoremVerbally and algebraically

Natalija [7]

Pythagorean Theorem<h2>Verbally:</h2>

Let's say a and b are the legs, and c is the hypotenuse. Then, algebraically, the theorem is,

$a^2+b^2=c^2$

7 0

1 year ago

Determine if (-1,9) and (-2,6) are solutions to the system of equations: x + y = 8 x2 + y = 10 A) Both are solutions B) Neither

Dahasolnce [82]

Answer:

D) Only (-1,9) is a solution.

Step-by-step explanation:

x+y =8

x^2 + y = 10

Lets check the first point (-1,9)

Put in x =-1 y =9

x+y =8

-1+9 = 8

8 =8

This works

x^2 + y = 10

(-1)^2 +9 =10

1+9 = 10

10 = 10

This works

Lets check the second point (-2,6)

Put in x =-2 y =6

x+y =8

-2+6 = 8

4=8

This does not work

We can stop now. (-2,6) cannot be a solution

7 0

3 years ago