1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Varvara68 [4.7K]
3 years ago
7

Jack went to baseball practice at 5:45 p.m. He returned home at 8:22 p.m. How long was he gone for? SHOW YOUR WORK PLEASE

Mathematics
1 answer:
Alexxandr [17]3 years ago
4 0

Answer:

2 hours and 37 mins

Step-by-step explanation:

you want to get to a full hour so 5:45 closes hour would be 15 minutes later which would be 6:00 and then you add 2 hours which would be 8:00 and you have 22 minutes to get 822 p.m. so you add the minutes together 15 + 22 which you'll get 37 and you'll have the 2 hours on the side so it would be 2 hours and 37 minutes

You might be interested in
What are the next two terms in the sequence?<br> 7, 19, 31, 43, ...
gavmur [86]

Answer:

youre just adding 12 each time

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
What is 3(5x-6)+2(x+8)?
Mashutka [201]

Answer:

I believe it's D. 17x-2

4 0
3 years ago
Read 2 more answers
Help solving this math
9966 [12]

Answer:

  1. 24 cm²
  2. 6400 -1600π ≈ 1373.45 square units

Step-by-step explanation:

1. You can look at this several ways.

It can be considered to be a stack of 1+2+3 = 6 squares that are 2 cm on a side, so have a total area of 6 × (2 cm)² = 24 cm².

You can lop off one of the squares sticking out and put it into the empty corner to form a 6 cm by 4 cm rectangle with an area of (6 cm)(4 cm) = 24 cm².

You can consider it to be a 6 cm square with 3 squares cut out of it that are 2 cm on a side: (6 cm)² -3(2 cm)² = (36 -12) cm² = 24 cm².

__

2. The shaded area is the difference in areas of a square 80 units on a side and a circle of 40 units radius. If we let d represent the side dimension of the square, then the area formulas are ...

  Square area = d²

  Circle area = π(d/2)²

So the difference area is ...

  shaded area = d² -(π/4)d² = d²(1 -π/4)

For d=80, the shaded area is ...

  shaded area = 80²(1 -π/4) = 6400 -1600π ≈ 1373.45 square units

6 0
3 years ago
Fred solved the equation 8(3x – 7) = -6(x + 7) + 4 as shown.
OleMash [197]

Answer: He added 4 to a negative 42 and said it was 46 but its supposed to simplify to -38. X=3/5

3 0
3 years ago
The cost of unleaded gasoline in the Bay Area once followed an unknown distribution with a mean of $4.59 and a standard deviatio
Aleks04 [339]

Answer:

P(\bar X\leq 4.55)=0.0142

c. 0.0142

Step-by-step explanation:

1) Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Let X the random variable that represent interest on this case, and for this case we know the distribution for X is given by:

X \sim N(\mu=4.59,\sigma=0.1)  

And let \bar X represent the sample mean, the distribution for the sample mean is given by:

\bar X \sim N(\mu,\frac{\sigma}{\sqrt{n}})

On this case  \bar X \sim N(4.59,\frac{0.1}{\sqrt{16}})

2) Solution to the problem

We want this probability:

P(\bar X\leq 4.55)

The question on this case is ".Find the probability that the average price for 30 gas stations is less than $4.55". So then our value for n=30.

If we apply the formula for the z score to our probability we got this:

P(\bar X \leq 4.55)=P(Z\leq \frac{4.55-4.59}{\frac{0.1}{\sqrt{30}}})=P(Z

And using the normal standard table or the following excel code we calculate the probability "=NORM.DIST(-2.19,0,1,TRUE)"

P(\bar X\leq 4.55)=0.0142

8 0
3 years ago
Other questions:
  • 2=7+b/4 what's the steps were suppose to do can someone step me through
    9·1 answer
  • The perimeter of a square is 96 inches. if the side length is 2x + 4, what is the value of x and the length of each side?
    10·1 answer
  • Suppose that on the leeward side of the island of Oahu, in the small village of Nanakuli, about 30% of the residents are of Hawa
    12·1 answer
  • What is -20 + (-68)=
    13·2 answers
  • What percent is 24 of 96
    15·1 answer
  • Factor the Greatest common factor. HELP PLEASE ASAP
    8·1 answer
  • What slope passes through points (2,7) and (4,7) ?
    9·1 answer
  • I need help on this answer
    9·2 answers
  • Can someone help me out with this my grade are bad
    12·1 answer
  • What argument does the author anticipate and indirectly refute in this excerpt from the Declaration of Independence?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!