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Leni [432]
3 years ago
8

Number Line B is between A and C. AB= 12 and BC= 17. what is the length of AC?

Mathematics
1 answer:
igor_vitrenko [27]3 years ago
5 0

Answer:

29

Step-by-step explanation:

AB+BC=AC

12+17=29=AC

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How do i solve quadratics and quadratic formula
Murljashka [212]

<u>Step-by-step explanation:</u>

Multiply the first and last coefficient

Find a pair that has the product of ac (above) and the sum of b

Replace the b-term with the pair.

Divide the four terms into two-terms on the left side and two terms on the right side and factor out the common terms from each side.

This is reverse of the distributive property so the terms factored out (on the outside of the common term) combine to create a factor and the common term is the other factor.  

Set each factor equal to zero and solve for the variable.

***************************************************************************************

1a. Answer: a = 1/2      a = -1

2a² + 3a + 1 = 0      → ac=2, b = 3    → use 1, 2  (product is 2 & sum is 3)

2a² + 2a + 1a + 1 = 0

2a² + 2a     +1a + 1        = 0

2a(<u>a + 1</u>)      +1(<u>a + 1</u>)      = 0

(2a + 1)(a + 1) = 0

2a + 1 = 0       and         a + 1 = 0

       a = 1/2    and               a = -1

**************************************************************************************

1b. Answer: y = -5/2    y = -5

2y² + 5y - 25 = 0  → ac=-50, b = 5 → use 10, -5  (product is -50 & sum is -5)

2y² + 10y - 5y - 25 = 0

2y² + 10y      - 5y - 25        = 0

2y(<u>y + 5</u>)      -5(<u>y + 5</u>)      = 0

(2y - 5)(y + 5) = 0

2y + 5 = 0       and         y + 5 = 0

       y = -5/2    and               y = -5

**************************************************************************************

1c. Answer: y = 5     y = 1/2

2y² - 11y + 5 = 0  → ac=10, b = -11 → use -1, -10  (product is 10 & sum is -11)

2y² - 1y - 10y + 5 = 0

2y² - 1y       -10y + 5        = 0

y(<u>2y - 1</u>)      -5(<u>2y - 1</u>)      = 0

(y - 5)(2y - 1) = 0

y - 5 = 0       and         2y - 1 = 0

     y = 5       and               y = 1/2

4 0
3 years ago
The table below shows the ticket rates for whale watching trips offered by Beluga Fun Tours:
pav-90 [236]
Answer should be A.
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3 0
3 years ago
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Scorpion4ik [409]

Answer:

B

Step-by-step explanation:

The original amount will be the coefficient of (1 + 0.04)^r which is $728.00.

6 0
3 years ago
The temperature dropped from 6 Celsius to -5 Celsius.How many degrees did the temperature drop?
kakasveta [241]
-11 degrees. 6+5=11, and it went down, so negative 11 degrees

7 0
3 years ago
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Plz help me step by step explanation would help for work plzzzz And Thank you PLEASE​
AnnyKZ [126]

Answer:

i hope this helps

Step-by-step explanation:

3 0
2 years ago
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