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tangare [24]
3 years ago
6

How do i solve 2k^2-5k-18=0

Mathematics
1 answer:
devlian [24]3 years ago
5 0

Answer:

factor left the side of the equation

(2k_9)(k+2)=0

set factors equal to 0

2k_9=0 or k+2=0

the answer is K= 9/2 or K =-2

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Tom opened a lemonade stand to earn money to buy a new bike for $200. He sells a cup of lemonade for $1.00. On the first day he
tia_tia [17]

1 - 8

2 - 16

3 - 32

x - +200

Each lemonade has a profit of $1, so the number of cups of lemonade he sells is the same as the amount of dollars he has. You just need to add each previous day's total to the next day's, doubling the amount of cups from the previous day's for each new day.

4 - (32 x 2 = ) 64

8 + 16 + 32 + 64 = 120. We need at least $80 dollars more, so we continue.

5 - (64 x 2 = ) 128

120 + 128 = $248.00 That's more than enough, so Tom will have enough money for his bike after the fifth day of selling lemonade.

6 0
3 years ago
A sequence is defined by the recursive function f(n + 1) =1/3 f(n). if f(3) 9= , what is f(1)
gayaneshka [121]

Answer:

f(1) = 81

Step-by-step explanation:

f(n + 1) = 1/3 f(n)

⇔ f(n) = 3 × f(n + 1)

……………………………

if f(3) = 9  ⇒  f(2) = 3 × f(3) = 3 × 9 = 27

Then

f(1) = 3 × f(2) = 3 × 27 = 81

5 0
2 years ago
Maya has a smart phone data plan that costs $50 per month that includes 2 GB of data, but will charge an extra $15 per GB over t
Mazyrski [523]

Answer:

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$50 is 2GB, and an extra GB used will cost $15. If Maya used 3GB it will cost $65

4 0
3 years ago
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Harrizon [31]

Answer:

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Step-by-step explanation:

To find this answer we have to do multiple steps.

So we know that vertical angles are congruent by the definition of vertical angles, <u><em>look at the picture</em></u>    

So, we also know that a triangle =180 degrees

therefore we can add 32 and 90 to find the 3rd angle measure

32+90=122, then 180(because that's the total of the triangle)-122=58

So, m<1=58 degrees

7 0
3 years ago
If a pier is 200 meters long and each board is 80 centimeters wide, how many boards are in the pier?
Luba_88 [7]
<span>250. 100 CM in 1 Meter. That leaves you with with .8 meters a board, 200/ .8 leaves you with 250</span>
6 0
3 years ago
Read 2 more answers
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