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2 years ago

Consider the equation: 3(–4n – 9) = 21

Mathematics

2 answers:

earnstyle [38]2 years ago

8 0

Answer:

The answer is Negative Four -4

Step-by-step explanation:

hram777 [196]2 years ago

7 0

Answer: N=-4

Step-by-step explanation:

STEP

Pulling out like terms

2.1 Pull out like factors :

-4n - 9 = -1 • (4n + 9)

Equation at the end of step

-3 • (4n + 9) - 21 = 0

STEP

Pulling out like terms

4.1 Pull out like factors :

-12n - 48 = -12 • (n + 4)

Equation at the end of step

-12 • (n + 4) = 0

STEP

Equations which are never true:

5.1 Solve : -12 = 0

This equation has no solution.

A a non-zero constant never equals zero.

Solving a Single Variable Equation:

5.2 Solve : n+4 = 0

Subtract 4 from both sides of the equation :

n = -4

One solution was found :

n = -4

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mash [69]

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3 years ago

PLS HELP ME I SUCK AT MATH

Rainbow [258]

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3 years ago

Make n the subject of the formula

kogti [31]

Answer:

$\mathsf{ \frac{m + 21}{5} = n }$

Step-by-step explanation:

To make "n" the subject of the formula, rearrange the formula so it begins with " n = "

To isolate the variable "n", you need to inverse the other terms on that side of the equation where "n" really is.

=> m = 5n - 21

there's a "-21" next to "5n", inverse of subtraction is addition, so add 21 on both sides of the equation.

=> m + 21 = 5n - 21 + 21

=> m+ 21 = 5n

There's also a 5 attached to n, that means the multiplication of n with 5, the inverse of multiplication is division, so dividing both sides of the equation by 5

$\mathsf{ \frac{m + 21}{5} = n }$

3 0

3 years ago

Use the drop-down menus to complete each equation so the statement about its solution is true.

disa [49]

Answer:

Step-by-step explanation:

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3 years ago

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GalinKa [24]

What? Can you re-type this?

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3 years ago