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3 years ago

How do we get x+2=6 from 3x+6=18 solve for x and explain how we get that equation

Mathematics

2 answers:

katovenus [111]3 years ago

8 0

Answer:

Step-by-step explanation:

Subtract 6 from 18. 3x=18. You could divide by 3 to get x=6

Elodia [21]3 years ago

4 0

The answer is positive 6

You might be interested in

Write an inequality for ten less than a number is at least 5

alexandr1967 [171]

Step-by-step explanation:

Let the number be x

so,

10 - x ≥ 5

Hope it helps ya

5 0

3 years ago

HELP PLEASE

mario62 [17]

Answer:

26.4

Step-by-step explanation:

Law Of Cosines:

$cos(A)=\frac{b^2+c^2-a^2}{2bc}$

This should work for any side. This can generally be thought as:

$cos(\text{angle}) = \frac{\text{sum of squares of two other sides-opposite side squared}}{\text{2 times the product of the other two sides}}$

If this is too confusing here's the formula for the other sides (which is essentially the same, just different variables)

$cos(B)=\frac{a^2+c^2-b^2}{2ac}$

$cos(C) =\frac{a^2+b^2-c^2}{2ab}$

Anyways now just plug in the known values into the equation

$cos(A)=\frac{4^2+6^2-3^2}{2(6)(4)}\\$

Square and multiply values

$cos(A)=\frac{16+36-9}{48}$

Add the values in the numerator

$cos(A)=\frac{43}{48}$

Take the inverse of cosine on both sides

$A=cos^{-1}(\frac{43}{48})$

calculate arccosine (inverse cosine) using a calculator

$A\approx 26.384$

Round to nearest tenth

$A\approx26.4$

7 0

2 years ago

3 Select the correct answer. What are the solutions to this equation? 16x² + 9 = 25

Charra [1.4K]

Answer:

Step-by-step explanation:

16x^2 + 9 = 25

16x^2 = 16

x^2 = 1

x = 1, -1

4 0

3 years ago

Can someone help me with this

jarptica [38.1K]

The answer is:

x=-8

Because:

If you pick a number(-8) to fill in the equation written below

5x+20+5x=5x-20

After applying the -8 to x you get

-40+20-40=-40-20

When you simply the both sides you get

-60=-60

And that’s right -60 is equal to -60!

5 0

4 years ago

Read 2 more answers

Please help ..........

Bess [88]

Try multiplying all the sides.

4 0

4 years ago

Read 2 more answers