This is a simple equation:)
We have to isolate "n" to be alone.
-21 = n - 8

First add 8 to both sides.
-21 = n - 8
+8 = + 8 it cancels out on the right side of the equal side and you solve on the left side

soooo
-21 + 8 = -13
-13 = n

Finally our answer is
-13 = n

When in doubt, eat a pineapple:)

8 0

2 years ago

-- Choose the correct simplification of the expression -5x2(4x – 6x2 – 3).

natali 33 [55]

$\huge \bf༆ Answer ༄$

Let's simply ~

${ \qquad{ \sf{ \dashrightarrow}}} \: \: \sf \: - 5 {x}^{2} (4x - 6 {x}^{2} - 3)$

${ \qquad{ \sf{ \dashrightarrow}}} \: \: \sf \:( - 5x {}^{2} \times 4x) - ( - 5 {x}^{2} \times 6 {x}^{2} ) - ( - 5 {x}^{2} \times 3)$

${ \qquad{ \sf{ \dashrightarrow}}} \: \: \sf \: - 20 {x}^{3} - ( - 30 {x}^{4} ) - ( - 15 {x}^{2} )$

${ \qquad{ \sf{ \dashrightarrow}}} \: \: \sf \: - 20 {x}^{3} + 30 {x}^{4} + 15 {x}^{2}$

${ \qquad{ \sf{ \dashrightarrow}}} \: \: \sf \:30 {x}^{4} - 20 {x}^{3} + 15 {x}^{2}$

5 0

2 years ago

The speed of light is estimated at 186,000 miles per second rounded to the nearest thousand miles per second.

AlexFokin [52]

A. 185,190 rounded to the nearest thousand is 185,000
B. 185,990 rounded = 186,000
C. 186,789 rounded = 187,000
D. 186,899 rounded = 187,000

so ur answer is B

7 0

2 years ago

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