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Free_Kalibri [48]
3 years ago
13

Which expression below has a coefficient of 3?

Mathematics
2 answers:
ahrayia [7]3 years ago
7 0
Your answer would be the last one 
ella [17]3 years ago
4 0
2x^2 + 3x -6
The 3x has a coefficient of 3
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Jorge received a 3.1% increase in his pay at work. If he now makes $8.00 per hour, how much was he making before his raise? (Rou
Blababa [14]

Answer:

$7.76

Step-by-step explanation:

Let x be the amount he was making before the raise.

He had an increase of 3.1% of x added to x which resulted in a new salary of $8.00 per hour.

Mathematically:

(\frac{3.1}{100} * x) + x = 8\\\\0.031x + x = 8\\\\1.031x = 8\\\\=> x = 8 / 1.031

x = $7.76

He was making $7.76 before the raise.

4 0
3 years ago
Jim is two years older than his sister Mary. The sum of their ages is greater than 32. Describe Mary’s age. Create and inequalit
-Dominant- [34]

Let the two ages be j and m, respectively.  Then j+m>32.

Solving for Mary's age, we get   m > 32 - j.  Because j = m + 2, m > 32 - (m+2).

Continue solving for m:  Adding m to both sides of this inequality results in

2m > 32 - 2.  Then 2m > 30, and m > 15.  Mary's age is greater than 15.

4 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
The product of 5 and a number y
zysi [14]

Answer: 5y

Step-by-step explanation:

Product means the multiplication of, so taking the product of 5 and y we simply have;

5*y=5y

8 0
2 years ago
Read 2 more answers
Let p: A number is greater than 25.
Alexeev081 [22]
If the number is between 25 and 35 It would have to be either 28 or 32.
4 0
3 years ago
Read 2 more answers
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