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
Sunny_sXe [5.5K]
3 years ago
12

A school day lasts from 9:00am to 3:45

Mathematics
1 answer:
coldgirl [10]3 years ago
5 0
9:00 to 3:45 = 6 hours 45 min
1 lesson = 55 min
6 lessons = 5 hours 30 min 
5.3 + 0.25 = 5 hours 55 min
6.45 - 5.55 = 50 min
lunch = 50 min

You might be interested in
Find a number so that 97.3% of it is 36
tiny-mole [99]
So x is the number
x time 97.3%=36
percent measn parts out of 100 so
97.3%=97.3/100=9.73/10=0.973/1=0.973
x times 0.973=36
divide both sides by 0.973
x=36.9989...
answer is aprox 36.9
7 0
3 years ago
A mathematics journal has accepted 14 articles for publication. However, due to budgetary restraints only 7 articles can be publ
butalik [34]
The total number of articles is 14 and only 7 can be published. Since what is asked is the ways to assemble the 7 articles, this is a permutation problem.
14P7 = <span>17297280 ways
If order is not of concern, the problem is just a combination problem
14C7 = </span><span>3432 ways</span><span />
7 0
4 years ago
Read 2 more answers
Help me and there will be an apple at your doorstep. (There might be some shipping issues)
Alexeev081 [22]

Answer:

9.30 maybe

Step-by-step explanation:

I just did mathz

3 0
3 years ago
Read 2 more answers
A plane takes off from an airport and flies at a speed of 400km/h on a course of 120° for 2 hours. the plane then changes its co
butalik [34]

Answer:

Distance from the airport = 894.43 km

Step-by-step explanation:

Displacement and Velocity

The velocity of an object assumed as constant in time can be computed as

\displaystyle \vec{v}=\frac{\vec{x}}{t}

Where \vec x is the displacement. Both the velocity and displacement are vectors. The displacement can be computed from the above relation as

\displaystyle \vec{x}=\vec{v}.t

The plane goes at 400 Km/h on a course of 120° for 2 hours. We can compute the components of the velocity as

\displaystyle \vec{v_1}=

\displaystyle \vec{v_1}=\ km/h

The displacement of the plane in 2 hours is

\displaystyle \vec{x_1}=\vec{v_1}.t_1=.(2)

\displaystyle \vec{x_1}=km

Now the plane keeps the same speed but now its course is 210° for 1 hour. The components of the velocity are

\displaystyle \vec{v_2}=

\displaystyle \vec{v_2}=km/h

The displacement in 1 hour is

\displaystyle \vec{x_2}=\vec{v_2}.t_2=.(1)

\displaystyle \vec{x_2}=km

The total displacement is the vector sum of both

\displaystyle \vec{x_t}=\vec{x_1}+\vec{x_2}=+

\displaystyle \vec{x_t}=km

\displaystyle \vec{x_t}=

The distance from the airport is the module of the displacement:

\displaystyle |\vec{x_t}|=\sqrt{(-746.41)^2+492.82^2}

\displaystyle |\vec{x_t}|=894.43\ km

8 0
4 years ago
two angles are supplementary of the sum is 180. the larger angle measures four degrees more than sevem times the measure of a sm
Aleksandr [31]

Answer:

22 and 158

Step-by-step explanation:

Supplementary angles add to 180. This is means there is a small and large angle. Adding together, they make 180.

  • "the larger angle measures four degrees more than seven times the measure of a smaller angle" is represented as 7x+4.
  • "x represents the measure of the smaller angle" is represented as x.

x + 7x+4 =180

8x+4=180

8x=176

x= 22

This is the measure of the smaller angle. The larger angle is 7(22)+4 = 158

5 0
3 years ago
Other questions:
  • The temperature dropped from 38°F to 12°F in 13 hours. Find the average rate of change per hour.
    14·1 answer
  • Factor completely n²₋n₋30
    8·1 answer
  • Arionna claims that since there are 3 feet in a yard, there are 9 cubic feet in a cubic yard. Which statement about her claim is
    10·2 answers
  • carlos biked 139/8 miles on Saturday and 135/7 miles on sunday which day did he ride further and by how much
    7·2 answers
  • For a group of 50 people, assuming that each person is equally likely to have a birthday on each of 365 days in the year, comput
    7·1 answer
  • PLEASE ANSWER QUICK<br><br> What is the unit rate for the ratio 96:8
    8·1 answer
  • To win a basketball game , one team scored 106 points. They made a total of 39 two-pointers and three-pointers.How many of the b
    6·1 answer
  • Pls help middle school math
    6·1 answer
  • Help me with this math quiestion its the picture below
    6·1 answer
  • Someone help plz and thanks
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!