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natka813 [3]
3 years ago
12

Twice the difference of a number and two is five

Mathematics
1 answer:
dezoksy [38]3 years ago
6 0

Answer:

2 (n - 2) = 5

n = 4.5

Step-by-step explanation:

2 (n - 2) = 5

2n - 4 = 5

     +4.   +4

2n = 9

divide both sides by 2

n = 9/2 = 4.5

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City code says you need to have a total of at least 54 toilet stalls, but each bathroom can only have 6 stalls. How many bathroo
Lady bird [3.3K]

City code says you need to have a total of at least 54 toilet stalls, but each bathroom can only have 6 stalls.

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6 0
3 years ago
A) -x + 9 = 56 <br> Solve and verify
leonid [27]

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-47

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3 0
3 years ago
Replace ? with an expression that will make the equation valid.
AlexFokin [52]

Answer:

4x³

Step-by-step explanation:

d/dx ln(x⁴ + 7) = 1/(x⁴ + 7) × _?

To obtain the missing expression, let us simplify d/dx ln(x⁴ + 7). This can be obtained as follow:

Let y = ln (x⁴ + 7)

Let u = (x⁴ + 7)

Therefore,

ln(x⁴ + 7) = ln u

Thus,

y = ln u

dy/du = 1/u

Next, we shall determine du/dx. This is illustrated below:

u = (x⁴ + 7)

du/dx = 4x³

Finally, we shall determine dy/dx of ln (x⁴ + 7) as follow:

dy/dx = dy/du × du/dx

dy/du = 1/u

du/dx = 4x³

dy/dx = 1/u × 4x³

But:

u = (x⁴ + 7)

Therefore,

dy/dx = 1/(x⁴ + 7) × 4x³

Thus, the missing expression is 4x³

6 0
3 years ago
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