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
____ [38]
2 years ago
10

Betty had 1 1/4 hours to finish a test. She was nervous and it took her 1/2 an hour to calm down. How much time did she have lef

t to finish the test? Express the answer as a mixed number.
Mathematics
1 answer:
Airida [17]2 years ago
5 0

Answer:

Betty had 45 minutes to take her test in mixed number form it is

Step-by-step explanation:

1 hour

1/4 an hour = 15 minutes

1/2 an hour is 30 minutes

1 hr 15- 30= 45

45= 3/4 of and hour remaining to test

You might be interested in
I need help with this lol
larisa86 [58]
Yo no he podido ir a ver uow pero no me ha dado like 18
8 0
3 years ago
How old is the expanded notation method work
Akimi4 [234]
Well, 
For example 

2.34 * 10^6 will be....
2,340,000
It is because if you have the positive powers, you move your decimal to the right. In this case the power is 6 so you move your decimal to the right 6 times. 
Here's another example

1.23 X 10^-2 
The answer will be 0.0123 because you move your decimal two the left two times. The power is negative 2 so you move it to the left.

Final tips: If you have positive power, move it to the right and if you have negative power, move it to the left.
3 0
3 years ago
Sarah is a computer engineer and manager and works for a software company. She receives a
daser333 [38]

Answer:

a) Number of projects in the first year = 90

b) Earnings in the twelfth year = $116500

Total money earned in 12 years = $969000

Step-by-step explanation:

Given that:

Number of projects done in fourth year = 129

Number of projects done in tenth year = 207

There is a fixed increase every year.

a) To find:

Number of projects done in the first year.

This problem is nothing but a case of arithmetic progression.

Let the first term i.e. number of projects done in first year = a

Given that:

a_4=129\\a_{10}=207

Formula for n^{th} term of an Arithmetic Progression is given as:

a_n=a+(n-1)d

Where d will represent the number of projects increased every year.

and n is the year number.

a_4=129=a+(4-1)d \\\Rightarrow 129=a+3d .....(1)\\a_{10}=207=a+(10-1)d \\\Rightarrow 207=a+9d .....(2)

Subtracting (2) from (1):

78 = 6d\\\Rightarrow d =13

By equation (1):

129 =a+3\times 13\\\Rightarrow a =129-39\\\Rightarrow a =90

<em>Number of projects in the first year = 90</em>

<em></em>

<em>b) </em>

Number of projects in the twelfth year =

a_{12} = a+11d\\\Rightarrow a_{12} = 90+11\times 13 =233

Each project pays $500

Earnings in the twelfth year = 233 \times 500 = $116500

Sum of an AP is given as:

S_n=\dfrac{n}{2}(2a+(n-1)d)\\\Rightarrow S_{12}=\dfrac{12}{2}(2\times 90+(12-1)\times 13)\\\Rightarrow S_{12}=6\times 323\\\Rightarrow S_{12}=1938

It gives us the total number of projects done in 12 years = 1938

Total money earned in 12 years = 500 \times 1938 = $969000

8 0
2 years ago
Find the product of<br><br><br><img src="https://tex.z-dn.net/?f=%28%20%20-%2012x%20%5E%7B3%7Dyz%20%5C%3A%29%20and%20%28%20%20%2
Alex

(-12x^3 yz)(-4x^3yz^4)\\\\=48x^6y^2 z^5

3 0
2 years ago
Read 2 more answers
Mike paid $11.71 total
yan [13]

Answer:

Bill received 13.68 change back.

Step-by-step explanation:

20-6.32=13.68

7 0
3 years ago
Read 2 more answers
Other questions:
  • Find the equation of the line that has a y-intercept of 6 and is parallel to y= -1/2x+2
    8·1 answer
  • Help!!!!!!!!!!!!!!!!!!!!!!!!!!!
    11·1 answer
  • An archer hits his target 80% of the time. If he shoots 7 arrows, what is the probability of each event
    5·1 answer
  • Please help me correct answer if you said it correct I will give you brainlist please!​
    8·1 answer
  • Solve the system using the substitution method.
    14·1 answer
  • Which are equations? Check all that apply.
    12·2 answers
  • Answer the following question for a chance of
    7·1 answer
  • Will give brainliest: how do i solve this??
    12·1 answer
  • For which equation is (3, 5) a solution?
    15·1 answer
  • 12 cm<br> 5 cm<br> 10 cm<br> 6 cm
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!