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jasenka [17]
3 years ago
11

Solve the equation x^2-4x-12=0 two ways. By factoring and by Quadratic formula

Mathematics
1 answer:
vichka [17]3 years ago
8 0
By factoring, find two values j and k which satisfy two conditions, jk=ac=-12 and j+k=b=-4, so j and k must be 2 and -6 so the factors are:

(x+2)(x-6)=0

So x=-2 and 6

By the quadratic formula, x=(-b±√(b^2-4ac))/(2a), in this case:

x=(4±√(16+48))/2

x=(4±√64)/2

x=(4±8)/2

x=2±4

x=-2 and 6
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Kanye deposits 3850 at 8% annual simple interest for 1 year how much interest will he earn
aalyn [17]

Answer:

308

Step-by-step explanation:

We are given;

  • Money deposited (Principal) as 3850
  • Annual rate of interest as 8%
  • Period or time = 1 year

We are required to determine the interest accrued;

  • We are going to use the formula of calculating simple interest;
  • Simple interest = (P × R × T)/100

Where P is the principal, R is the rate while T is the time.

Therefore;

Simple interest = (3850 × 8 × 1) ÷ 100

                        = 308

Therefore, the money earned simple interest of 308 within 1 year

7 0
4 years ago
Please help me with this
galben [10]
6+ 4×whatever y equals +9
3 0
4 years ago
Read 2 more answers
#8 please. GCF of 117, 99, and 126
Advocard [28]
The factors of 117 are: 1, 3, 9, 13, 39, and 117
The factors of 99 are: 1, 3, 9, 11, 33, and 99 
The factors of 126 are: 1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, and 126

The greatest common factors of 117, 99, and 126 are: 1, 3, and 9. And according to your answer choices your answer is C. 9
7 0
3 years ago
** PLEASE ANSWER I’L GOVE YOU BRAINLYLIST**
Leviafan [203]

Penelope eats 4 chocolates per day, because in one day, 20 chocolates are in the box. Then, after 2 more days, 8 chocolates are eaten. That means, if she eats an even amount of chocolates, she eats 4 chocolates per day. To check this pattern, on the fourth day, there are 8 chocolates left. 12 - 8 = 4, and the pattern would continue. On the fifth day, 4 chocolates would be left, and on the sixth day, 0 chocolates would be left.

3 0
3 years ago
With work please and thanks
Ipatiy [6.2K]

Answer:

Step-by-step explanation:

He bought a total of 5 tickets, some child, some adult. This is the NUMBER equation.

# of adult tickets + # of child tickets = 5 tickets

Now for the COST equation. Each child ticket costs $2, so the expression for that is 2c; each adult ticket costs $8, so the expression for that is 8a. He spend a total of $22:

$2c + $8a = $22

Money and the number of tickets are NOT THE SAME so they cannot be put into the same equation. They won't add or subtract because they're not like.

Your system is choice A

7 0
3 years ago
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