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eduard
3 years ago
9

Please help I will give brainly.

Mathematics
2 answers:
Yuri [45]3 years ago
6 0
53.505 seconds im pretty sure
Vilka [71]3 years ago
5 0

Answer:

53.505 seconds

Step-by-step explanation:

Since we are told that the sum of the two laps in a whole number we can then know that the only number between 53 and 54 seconds that would work here is 53.505 seconds.

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Lily took out a 5-year loan from the bank for $31,000 to purchase a new car. At the end of the loan, she had paid a total of $37
otez555 [7]

Answer:

=24.5%

Step-by-step explanation:

  1. Simple interest = (principal×rate×time)÷100. *brackets first*
  2. transpose the formula to make rate the subject: rate= (100×simple interest) ÷ (principal×time)
  3. plug in values: rate = (100×37975) ÷ (31000×5)
  4. the result is 24.5%
8 0
3 years ago
Apply Crammer's Rule to find the solution to the following quations .2x + 3y = 1, 3x + y = 5​
Bond [772]

Answer:

The solution to the equation system given is:

  • <u>x = 2</u>
  • <u>y = -1</u>

Step-by-step explanation:

First, we must know the equations given:

  1. 2x + 3y = 1
  2. 3x + y = 5​

Following Crammer's Rule, we have the matrix form:

\left[\begin{array}{ccc}2&3\\3&1\end{array}\right] =\left[\begin{array}{ccc}x\\y\end{array}\right] = \left[\begin{array}{ccc}1\\5\end{array}\right]

Now we solve using the determinants:

x=\frac{\left[\begin{array}{ccc}1&3\\5&1\end{array}\right]}{\left[\begin{array}{ccc}2&3\\3&1\end{array}\right] } =\frac{(1*1)-(5*3)}{(2*1)-(3*3)} = \frac{1-15}{2-9} =\frac{-14}{-7} = 2

y=\frac{\left[\begin{array}{ccc}2&1\\3&5\end{array}\right]}{\left[\begin{array}{ccc}2&3\\3&1\end{array}\right] } =\frac{(2*5)-(3*1)}{(2*1)-(3*3)}=\frac{10-3}{2-9} =\frac{7}{-7}=-1

Now, we can find the answer which is x= 2 and y= -1, we can replace these values in the equation to confirm the results are right, with the first equation:

  • 2x + 3y = 1
  • 2(2) + 3(-1)= 1
  • 4 - 3 = 1
  • 1 = 1

And, with the second equation:

  • 3x + y = 5​
  • 3(2) + (-1) = 5
  • 6 - 1 = 5
  • 5 = 5

 

4 0
3 years ago
Which sets of ordered pairs represent a function? Select all that apply.
antoniya [11.8K]

Answer:

B, C, and E

Step-by-step explanation:

In order for a function to be a function, an ordered pair cannot be on the same x coordinate

7 0
2 years ago
Tucker has 5 pennies 6 dimes and 5 quarters what is the ratio of pennies to total coins?
dimulka [17.4K]

Answer:

  5 : 16

Step-by-step explanation:

Tucker has a total of 5 + 6 + 5 = 16 coins. The ratio of 5 pennies to that total is ...

  pennies : total coins = 5 : 16

3 0
3 years ago
Six friends, four boys and two girls, went to a movie theater. They wanted to sit in a way so no girl sits on either first or la
mel-nik [20]

Answer:

120 ways

Step-by-step explanation:

Since no girl wil sit either first or last

Hence, in all irrespective whether boy or girl = (6 - 1)! = 5! = 5 X 4 X 3 X 2 = 120

∴ Number of arrangements = 120 ways

8 0
3 years ago
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