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belka [17]
3 years ago
9

The ratio of the ages (in years) of two teachers is 8 : 9. The sum of their ages is 51. What is the age of each teacher?

Mathematics
1 answer:
Keith_Richards [23]3 years ago
8 0

Answer:

Check pdf

Step-by-step explanation:

Download pdf
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How do you do prime factorization?
blondinia [14]
Both methods start out with a factor<span> tree. A </span>factor<span> tree is a diagram that is used to break down a number into its </span>factors until<span> all the numbers left are </span>prime. The first way you can use a factor<span> tree to find the </span>factorization of a number is to divide out prime<span> numbers only. Let's </span>factor<span> 24 using this method.</span>
6 0
3 years ago
What are the factors of 2x^2 + 5x -12?
Andrews [41]

Answer:

(2x - 3) • (x + 4)

Step-by-step explanation:

Step  1  :

Equation at  step  1  :

 (2x2 +  5x) -  12

Step  2  :

Trying to factor by splitting the middle term

2.1     Factoring  2x2+5x-12  

The first term is,  2x2  its coefficient is  2 .

The middle term is,  +5x  its coefficient is  5 .

The last term, "the constant", is  -12  

Step-1 : Multiply the coefficient of the first term by the constant   2 • -12 = -24  

Step-2 : Find two factors of  -24  whose sum equals the coefficient of the middle term, which is   5 .

-24    +    1    =    -23  

     -12    +    2    =    -10  

     -8    +    3    =    -5  

     -6    +    4    =    -2  

     -4    +    6    =    2  

     -3    +    8    =    5

Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above,  -3  and  8  

                    2x2 - 3x + 8x - 12

Step-4 : Add up the first 2 terms, pulling out like factors :

                   x • (2x-3)

             Add up the last 2 terms, pulling out common factors :

                   4 • (2x-3)

Step-5 : Add up the four terms of step 4 :

                   (x+4)  •  (2x-3)

            Which is the desired factorization

3 0
3 years ago
Corey invested $800 in a CD at a simple interest rate. After 24 months, his account was worth $1000.
Vladimir [108]

Answer:

made 25%

Step-by-step explanation:

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3 years ago
Mrs. Cho drives 45 miles in one hour if her speed stays constant how many hours will it take for her to drive 405 miles?
igomit [66]
You do 405 divided by 45 and the answer is 9
7 0
3 years ago
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What is the probbability of flipping a coin 15 times and getting heads 6 times?
asambeis [7]

Answer:

if I'm wrong let me know 25

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2 years ago
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