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KiRa [710]
2 years ago
6

Tina was given the function y = x 2+ x – 5. For what x value(s) would y = 15?

Mathematics
1 answer:
ziro4ka [17]2 years ago
6 0

Answer:

the correct answer is 4

Step-by-step explanation:

y = x^2 + x - 5

y = 4^2 + 4 - 5

y= 16 + 4 -5

y = 15

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a local pizzeria sold 65 pizzas yesterday.(a) the owner offers the employees a bonus if the number of pizza increased by 20 pers
BigorU [14]

Answer: 78 pizzas

Step-by-step explanation:

65/10=6.5=10%

6.5*2=13 pizzas=20%

65+13=78 pizzas

4 0
2 years ago
A literature professor decides to give a 10-questiontrue-false quiz to determine who has read an as-signed novel. She wants to c
Darya [45]

Answer:

The teacher should set the score 7 as the lowest passing grade.

Step-by-step explanation:

Let <em>X</em> = number of correct guesses.

All the questions are of true-false format.

The probability of getting a correct answer is, <em>p</em> = 0.50.

The total number of questions is, <em>n</em> = 10.

The random variable <em>X</em> follows a Binomial distribution with parameters <em>n</em> = 10 and <em>p </em>= 0.50.

The probability mass function of <em>X</em> is:

P(X=x)={10\chose x}0.50^{x}(1-0.50)^{10-x};\ x=0,1,2,3...

Now the teaches chose the grading scheme such that the probability of passing a student who guesses on every question is less than 0.05.

Then the probability of failing such a students is at least 1 - 0.05 = 0.95.

Compute the probability distribution of <em>X</em>.

Consider the probability distribution attached below.

The value of <em>x</em> for which P (X ≤ x) is at least 0.95 is, <em>x</em> = 7.

So the teacher should set the score 7 as the lowest passing grade.

7 0
2 years ago
a pool tank fills 60 gallons of water in 1/5 of an hour. How many gallons of water can be filled up in 1 hour?
klasskru [66]
If it takes 1/5 hour to fill 60 gallons
than multiply the fraction by 5 to get a whole hour
and multiply the 60 gallons by 5 to get the amount of water created in that hour
60*5= 300 gallons of water in 1 hour
5 0
3 years ago
Read 2 more answers
What do you get when you subtract 9 from b?
In-s [12.5K]
Answer:

4

step by step:

b-9=4
5 0
3 years ago
-9 ÷ ____ =5<br><br><br>(fill the blank)​
Alona [7]

Answer:

The answer is -1.8

Step-by-step explanation:

5 x -1.8 = -9 = -9 divided by -1.8 = 5

3 0
2 years ago
Read 2 more answers
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