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Svetlanka [38]
3 years ago
6

2

Mathematics
2 answers:
zubka84 [21]3 years ago
8 0

Answer:

Tax=$3.75

Total= $78.75

Step-by-step explanation:

You multiply the percentage and money for example.

100 dollar phone. The tax is 20%, you move the decimals two times to the left.  (.20) then you multiply .20 and 100 to get the tax, which is 20. Now since you know the tax is 20 dollars, you add it to the amount of the item, so the total is 120 dollars.

Sophie [7]3 years ago
6 0

Answer:

the ammount of tax is $15.

the total price paid is $90.

Step-by-step explanation:

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Cameron and Logan decided to share a large sub sandwich. Cameron ate 3/6 and Logan 2/6 of the sandwich. How much of the sandwich
torisob [31]

Answer:

Together, the boys ate 5/6 of the sandwich, leaving 1/6 of the sandwich left.

7 0
3 years ago
I think it’s b but I’m not sure... please show work I need help ASAP
ohaa [14]
The answer is b. Great job! here ill show you the work.
15x +90 > 270
move constant to the right side and change its sign, like this:
15x>270-90
then subtract the numbers
15x>180
lastly, divide both sides by 15. 
hope this helped!
5 0
3 years ago
Janae wrote the following polynomial expression: 2x5 - 4x3 + 6x8.
emmasim [6.3K]

Answer:

Justin is correct

Step-by-step explanation:

2x^5 - 4x^3 + 6x^8.

We need to rewrite the polynomial in decreasing order

6x^8 +2x^5 -4x^3

The leading coefficient is 6

8 0
3 years ago
Is 9 a possible solution for -2x + 4 ≥ -14?
konstantin123 [22]

Answer:

Yes

Step-by-step explanation:

-2(9)+4= -14  and -14 is equal to -14.

6 0
3 years ago
The​ life, in​ years, of a certain type of electrical switch has an exponential distribution with an average life β=44. If 100 o
Bond [772]

Answer:

0.9999

Step-by-step explanation:

Let X be the random variable that measures the time that a switch will survive.

If X has an exponential distribution with an average life β=44, then the probability that a switch will survive less than n years is given by

\bf P(X

So, the probability that a switch fails in the first year is

\bf P(X

Now we have 100 of these switches installed in different systems, and let Y be the random variable that measures the the probability that exactly k switches will fail in the first year.

Y can be modeled with a binomial distribution where the probability of “success” (failure of a switch) equals 0.0225 and  

\bf P(Y=k)=\binom{100}{k}(0.02247)^k(1-0.02247)^{100-k}

where  

\bf \binom{100}{k} equals combinations of 100 taken k at a time.

The probability that at most 15 fail during the first year is

\bf \sum_{k=0}^{15}\binom{100}{k}(0.02247)^k(1-0.02247)^{100-k}=0.9999

3 0
3 years ago
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