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hammer [34]
2 years ago
11

Please help! -3n+147=0

Mathematics
1 answer:
horrorfan [7]2 years ago
6 0

Answer:

n = ±7

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Order of Operations: BPEMDAS
  • Equality Properties

<u>Algebra I</u>

  • Solving quadratics

Step-by-step explanation:

<u>Step 1: Define equation</u>

-3n² + 147 = 0

<u>Step 2: Solve for </u><em><u>n</u></em>

  1. Subtract 147 on both sides:                    -3n² = -147
  2. Divide -3 on both sides:                          n² = 49
  3. Square root both sides:                           n = ±7
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FACTOR the expression 6x+3y-12 using the greatest common multiple.
Vedmedyk [2.9K]

Answer:

Step-by-step explanation:

For 6x+3y-12 the greatest common factor is 3 so

3(2x+y-4)

For -2+6x+4+4x

10x+2 and 2 is greatest common factor so

2(5x+1)

8 0
3 years ago
What is the area of this figure?<br><br> Enter your answer in the box.<br><br> mm²
Rainbow [258]

Answer:

84mm^{2}

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7 0
3 years ago
What is the nth term of the sequence -2 -8 -18 -32 -50
andreev551 [17]

Answer:

-2n²

Step-by-step explanation:

Using the image attached:
We see that the second differences (blue ones) are all equal so we conclude that this is a quadratic sequence.
The quadratic sequence has the form:
T_{n} = an^{2}  +bn +c

To find the value of a we just divide second difference ( -4 ) by 2:

  • a = \frac{-4}{2}= -2

Now we have:

  • T_{n}= -2n^{2}  +bn+c

Substitute n_{1} and n_{2} into the equation above:

  • T_{1} = -2(1)^{2}  +b(1) +c
  • T_{2} = -2(2)^{2}  +b(2)+c

Since T_{1} = -2 and T_{2} = -8 , after simplification we have:

  • b +c =0
  • 2b+c=0

The solution of this system is:

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The general term is :

T_{n} = -2n^{2}

6 0
2 years ago
Help? Would be appreciated!!
MaRussiya [10]

Answer:

a. 5 ones

b.8 hundreds

c.9 thousandths

d.1 tenths

e. 7 hundreths

f. 1 millions

hope that helps you

7 0
2 years ago
Michelle plans on raising $80 for her softball team. To raise the money, she is selling team shirts for $10 each.
8_murik_8 [283]

Given:

Michelle plans on raising $80.

Selling price of each shirt = $10

So far she has raised $20.

To find:

The number of more shirts she needs to sell.

Solution:

Let x be the number of more shirts she needs to sell.

Selling price of one shirt = $10

Selling price of x shirt = $10x

Total raising amount = $(10x + 20)

Michelle plans on raising $80. So,

10x+20=80

Subtract both sides by 20.

10x=80-20

10x=60

Divide both sides by 10.

x=\dfrac{60}{10}

x=6

So, the required equation is 10x+20=80

Therefore, the correct option is A.

6 0
3 years ago
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