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ruslelena [56]
3 years ago
14

If 12 keychains cost $9 then how much does 20 keychains cost? $________ Also if you could may you provide steps on how you got t

he answer​

Mathematics
2 answers:
AleksandrR [38]3 years ago
5 0

Answer:

Step-by-step explanation:

12k=9

12k*5/3=9*5/3

20k=15

Jlenok [28]3 years ago
5 0

Answer:

20 keychains will be $15

Step-by-step explanation:

i did 9 divided by 12 equals 0.75 so thats how much each keychain costs. 0.75x20=15

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Who can help ? <br> please
Assoli18 [71]

Answer:

The apple is definitely equal to 7 each apple.

Step-by-step explanation:

Not sure about the tomato and pear.

5 0
2 years ago
The total cost to play paintball can be represented by the expression (48x+54). If Rocco and five friends split the cost equally
KonstantinChe [14]

Answer:

8x + 9

Step-by-step explanation:

The total number of people splitting the cost equally = Rocco and five friends = 6 people

The total cost to play paintball can be represented by the expression (48x+54)

The cost for each person is calculated as: The total cost to play paintball/ Total number of people

= (48x+54)/6

= 48x/6 + 54/6

= 8x + 9

Therefore, the cost for each person is

8x + 9

6 0
3 years ago
Find the sum of all integers 30 to 80, INCLUSIVE. (Is there a formula to do this?)
Marina86 [1]
Yes there is actually a formula for this. This is an arithmetic progression with a common difference of 1. 

The sum of terms can be solved by using the formula

S = (n/2) * (a1 + an)

where S is the sum of the terms
n is the number of terms 
a1 is the first term
an is the last term

we can calculate the number of terms, n by using the formula

an = a1 + (n-1)*d

d is the common difference equal to 1 

therefore n = 51

substituting to the first equation

S = 2805
4 0
3 years ago
How do you find the y intercept when given points
tia_tia [17]

Answer:

On graph Y is vertical line and the intercept is where it matches x ,  as x is horizontal and always first to find. The usual equation to find x = 0 will always give you the y value in the given equation.

Step-by-step explanation:

3 0
3 years ago
4 to the 4th power times 4 to the 3rd power over 4 to the 5th power
11111nata11111 [884]

\bf ~\hspace{7em}\textit{negative exponents} \\\\ a^{-n} \implies \cfrac{1}{a^n} ~\hspace{4.5em} a^n\implies \cfrac{1}{a^{-n}} ~\hspace{4.5em} \cfrac{a^n}{a^m}\implies a^na^{-m}\implies a^{n-m} \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ \cfrac{4^4\cdot 4^3}{4^5}\implies \cfrac{4^{4+3}}{4^5}\implies \cfrac{4^7}{4^5}\implies \cfrac{4^7\cdot 4^{-5}}{1}\implies 4^{7-5}\implies 4^2\implies 16

3 0
3 years ago
Read 2 more answers
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