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Katen [24]
4 years ago
6

What two number multiply to -48 and add to -2?

Mathematics
1 answer:
Novosadov [1.4K]4 years ago
5 0

Answer:

6 and -8

Step-by-step explanation:

Solve:

xy = 48

x + y = -2

You can say y = -2-x = -(x+2) and then substitute that in the first:

-x(x+2) = 48

-x² -2x - 48 = 0

x² + 2x + 48 = 0

Quadratic formula can do the rest if you don't "see" the factorization.

You might be interested in
If f(1) = 9 and f(n) = -4f(n-1) + 4 then find the value of f(3).
Novay_Z [31]

Answer:

132

Step-by-step explanation:

f(1) = 9

f(n) = -4f(n-1) + 4

Let n = 2

f(2) = -4f(2-1) + 4 = -4 f(1) +4 = -4(9) +4 = -36+4 = -32

Let n = 3

f(3) = -4f(2-1) + 4 =-4f(2)+4 =  -4 (-32) +4 = 128+4=132

4 0
2 years ago
A county is 50% African-American and 50% Caucasian, and an African-American is on trial. A jury has been selected that contains
zepelin [54]

Answer:

The defendant claim is credible. It should be advised that the defendant can pursue his claim of racial bias in jury

Step-by-step explanation:

Since the county comprises of 50% African-American and 50% Caucasian. If a jury of 8 members are to be selected from the county's people,

The probability of selection of 4 African-American is 4/8(50%) = 1/2

The probability of selection of 4 Caucasian is 4/8(50%) = 1/2.

This above is a binomial probability distributions. It is a probability of two possible outcomes, summing up to equals 1.

Selection of 2 African-American and 6 Caucasian in 8 jury members actually show a racial bias. It does not reflect 50% each proportion and probability.

Probability of African-American Jury selection is 2/8(1/4)

Probability of Caucasian Jury selection is 6/8(3/4)

4 0
3 years ago
The regular price of a Space Invader game is $30, but it is on sale. The discount is $15. What percent discount is this?
masha68 [24]

Answer:

50%

Step-by-step explanation:

15=30x

x=0.5

x=50%

3 0
3 years ago
Read 2 more answers
Samuel has 2 1/4 cups of flour. She uses 1/3 of the flour to make pancakes. How many cups of flour did he use? Please try to exp
Kruka [31]

Answer:

Samuel uses 1 11/12 cups of flour.

Step-by-step explanation:

Okay, this is assuming he uses the rest of the flour she didn't use.

The first step would be to find the Greatest Common Factor(GCF) of the fractions

2 1/4 and 1/3 have different denominators, but they both can divide into 12.

1/4 * 3/3 = 3/12

1/3 * 4/4 = 4/12

Now we can also convert 2 3/12 into an improper fraction to make it easier

2* 12/12 = 24/12

24/12+ 3/12 = 27/12

Here's the part were we subtract the two numbers.

27/12- 4/12 = 23/12

The last step is to simplify the fraction

23/12 = 1 11/12 cups

5 0
3 years ago
HELP ME PLEASE!!!!! Which are the solutions of 3x2 – 2x – 5 = 0 by factoring?
Lunna [17]

Answer:

B

Step-by-step explanation:

Bbbbbbbbbbnbbbbbbbbbbb

7 0
3 years ago
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