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aev [14]
4 years ago
10

Homework help. Solve 4x-2=2x-10

Mathematics
1 answer:
ahrayia [7]4 years ago
7 0
4x - 2 = 2x - 10

First, subtract 2x from both sides. / Your problem should look like: 4x - 2 - 2x = -10
Second, subtract 4x - 2 - 2x to 2x - 2. / Your problem should look like: 2x - 2 = -10
Third, add 2 to both sides. / Your problem should look like: 2x = -10 + 2
Fourth, simplify -10 + 2 to get -8. / Your problem should look like: 2x = -8
Fifth, divide both sides by 2. / Your problem should look like: x =  -\frac{8}{2}
Sixth, simplify \frac{8}{2} to 4. / Your problem should look like: x = -4

Answer: x = -4

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Debora [2.8K]
Funny cause I just did something similar a few minutes ago

6 0
3 years ago
A mystery number is multiplied by 11 then 10 is subtracted from it to give you a result of 34. What is the mystery number?
klemol [59]

Answer:

4

Step-by-step explanation:

And let the missing number be x

We can solve using Algebra

11x - 10 = 34

11x = 34 + 10

11x = 44

x = 44/11

x = 4

For verification:

4(11) - 10 = 34

44 - 10 = 34

34 = 34

Hence, Proved

3 0
3 years ago
Write expression as a sine or cosine of an angle.<br>cos 94° cos 18° + sin 94° sin 18° ​
MArishka [77]
<h3>Answer:  cos(76)</h3>

=========================================================

Explanation:

The original expression is of the pattern cos cos + sin sin. This pattern matches the second identity in the hint. Specifically, we'll say the following:

cos(A - B) = cos(A)cos(B) + sin(A)sin(B)

cos(A)cos(B) + sin(A)sin(B) = cos(A - B)

cos(94)cos(18) + sin(94)sin(18) = cos(94 - 18)

cos(94)cos(18) + sin(94)sin(18) = cos(76)

----------

We can verify this by use of a calculator. Make sure your calculator is in degree mode.

  • cos(94)cos(18) + sin(94)sin(18) = 0.24192
  • cos(76) = 0.24192

Both expressions give the same decimal approximation, so this helps confirm the two expressions are equal. You could also use the idea that if x = y, then x-y = 0. Through this method, you'll subtract the left and right hand sides and you should get (very close to) zero.

6 0
3 years ago
The length of a rectangle is eight more than twice its width. The perimeter is 96 feet. Find the dimensions of the rectangle
blagie [28]

Step-by-step explanation:

Length = L

Width = W

L=8 more than 2W

L = 8 * 2W

L = 16W

Perimeter = 96

perimeter is the lengths of all sides added together

so

2L + 2W = 96

we have

L = 16W

2L + 2W = 96

let's do substitution

put what L = into 2L + 2W = 96

so

2(16W) + 2W = 96

can you rearrange that to get w

put answer in comment

4 0
2 years ago
Show that every positive integer is of the form 2q and that every odd integer is of the
irinina [24]
IF n is a positive integer THEN  n mod 2=0
IF n is an odd integer THEN n mod 2=1
SO you can draw that conclusion.
You are welcome.
6 0
3 years ago
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