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
klemol [59]
3 years ago
7

school has 8 periods a day each of 45 minutes’ duration. How long would each period be, if the school has 9 periods a day, assum

ing the number of school hours to be the same?
Mathematics
1 answer:
Morgarella [4.7K]3 years ago
4 0

Answer:

40 min per period

Step-by-step explanation:

When it has 8 periods :

Total time = 45 min per period for 8 period

Total time = 45 × 8 min

When it has 9 periods : let each period be of x min

Total time = x min per period for 9 period

Total time = x × 9 min

As total time remains same,

45 × 8 = x × 9

5 x 8 = x

40 = x

You might be interested in
Which set of steps will translate f(x)=6x to g(x) =6x-5-7?
BaLLatris [955]

Answer:

vertical translation of 5 units in the negative y direction, followed by a vertical translation of 7 units in the negative y direction.

Step-by-step explanation:

given f(x)=6x

f(x)=6x ---> f(x)=6x - 5    (Vertical translation by 5 units in the negative y (i.e downward) direction)

f(x)=6x - 5 ---> f(x)=6x - 5  - 7 (Vertical translation by 7 units in the negative y (i.e downward) direction)

hence it is a vertical translation of 5 units in the negative y direction, followed by a vertical translation of 7 units in the negative y direction.

4 0
3 years ago
Help again...brainliest
laiz [17]

Answer:

A.

Step-by-step explanation:

Atom is the smallest thing g possible and organ is the biggest on that list.

8 0
3 years ago
The numbers 7, 11, 12, 13, 14, 18, 21, 23, 27, and 29 are written on separate cards, and the cards are placed on a table with th
kaheart [24]

Answer:

3/10

Step-by-step explanation:

<em>Step 1 : Write the formula of calculating probability</em>

Probability = Number of favourable outcomes/Number of total outcomes

<em>Step 2 : Identify the favourable (requires) outcomes and the total outcomes</em>

  • Total outcomes are the total cards that are placed on the table = 10 cards
  • The favourable outcomes are the number of cards that have an even number on them.

       12, 14, 18 = 3 cards

<em>Step 3 : Substitute the values in the formula</em>

Probability = Number of favourable outcomes/Number of total outcomes

Probability = 3/10

Therefore, the probability of picking a card with and even number is 3/10.

!!

7 0
3 years ago
Determine whether the two expressions are equivalent. If so, tell what property
Aleksandr-060686 [28]

Answer:

They are equivalent by Associative Property

Step-by-step explanation:

(3•6)•9 is 18•9 which is 162

3•(6•9) is 3•54 which is also 162

So the difference between the two expressions is that they are grouped differently. In the first expression the 3•6 had to be multiplied first. In the other expression the 6•9 had to be multiplied first. But really both were 3•6•9 and it's all multiplication and can happen in any order. But the order 3, 6, 9 did not change. That is Associative property that says you can multiply by grouping factors differently and still get the same answer.

8 0
3 years ago
A news article says that high school students are currently spending an average of 15 hours per week doing homework online. You
Wewaii [24]

Answer:

Step-by-step explanation:

The null hypothesis is the hypothesis that is assumed to be true. It is an expression that is the opposite of what the researcher predicts.

The alternative hypothesis is what the researcher expects or predicts. It is the statement that is believed to be true if the null hypothesis is rejected.

From the given situation,

news article says that high school students are currently spending an average of 15 hours per week doing homework online. This is the null hypothesis.

H0: µ = 15 hours

You don't think this is an accurate estimate, although you're not sure whether the real value is higher or lower. This is the alternative hypothesis.

Ha : µ ≠ 15 hours

6 0
3 years ago
Other questions:
  • the area of a rectangular photograph is 35 square inches. If the width of the photo is 5 inches how tall is the photo
    11·1 answer
  • Write the standard form of the equation. through (2-4) slope=-1
    5·1 answer
  • The total cost for renting a boat is $25 and the cost of fuel a operating the boat is $1.30 per day write equation that will giv
    12·1 answer
  • I have four times as much money as my brother has. Our total is $55. How much does each of us have?
    15·2 answers
  • Please help me. i am having a bit of trouble.
    6·2 answers
  • The pentagons ABCDE and JKLMN are similar. Find the length x of LM
    8·1 answer
  • I need some help with this
    5·1 answer
  • Will mark brainly :)
    10·1 answer
  • There are 22 students in a homeroom. How many different ways can they be chosen
    7·1 answer
  • The ladder to the slide is 21 feet high. how long is the slide
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!