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ss7ja [257]
3 years ago
13

Which expressions are equivalent to −6n+(−12)+4n ?

Mathematics
2 answers:
Pepsi [2]3 years ago
8 0

Answer

choice a is the correct answer

Step-by-step explanation:

mars1129 [50]3 years ago
4 0

Answer:

4(n - 3) - 6n

Step-by-step explanation:

-6n + (-12) + 4n = -2n - 12

4(n - 3) - 6n = 4n - 12 - 6n = -2n - 12

2(2n - 6) = 4n - 12

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Help please!!!!!!!!!!!!!!!!!!!!!!!!!!!!
MatroZZZ [7]

9514 1404 393

Answer:

  second step is wrong; x = 5

Step-by-step explanation:

The correct solution is ...

  3(x -3) +9 = 15

  3x -9 +9 = 15 . . . . . . . not 3x -3

  3x = 15

  x = 5

_____

Jeremy did what a lot of students do -- failed to apply the outside factor to <em>all</em> of the terms in parentheses.

6 0
3 years ago
What is the surface area of a sphere with a radius of 12 units?
seraphim [82]

Answer:

C

Step-by-step explanation:

The surface area (A) of a sphere is calculated as

A = 4πr² ← r is the radius, here r = 12, hence

A = 4π × 12²

  = 4π × 144 = 576π units² → C

6 0
4 years ago
Please help. I think I know but I'd like to have it confirmed.
V125BC [204]
Part 1
40 \times 10.5 = 402
Part 2
40 \times 10.5 + 5 \times 1.5 \times 10.5 \\ = 402 + 78.75 \\ = 480.75
4 0
3 years ago
The option for the first one is graph A or graph B
horrorfan [7]

First answer: Graph A

Second answer: E) Increase less

Graph A shows a flatter curve compared to B which is steeper. The steeper the curve, the faster the increase.

4 0
4 years ago
A dollar bill is about 15.5 cm long. If seventeen trillion dollar bills were laid end to end around the Earth's equator, how man
Mariana [72]

Answer:

The dollar bills would encircle earth 65753.1 times

Step-by-step explanation:

We have

Length of dollar bill = 15.5 cm

Total dollar bills = 17 trillion = 17\times 10^{12}

Thus the length of 17 trillion dollar bills equals

15.5\times 17\times 10^{12}cm\\\\=263.5\times 10^{12}cm\\\\=\frac{263.5\times 10^{12}}{10^{5}}km\\\\=263.5\times 10^{7}km

Now taking shape of earth as a perfect sphere the circumference of earth becomes

C=2\pi r\\\\=2\times \pi \times 6378km\\\\=40074.1558km

Thus the number of times the dollar bills would encircle earth equals

\frac{263.5\times 10^{7}km}{40074.1558km}=65753.21times

6 0
3 years ago
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