She done better at the 2nd test because she only got 4 wrong but on the first test she got 6 wrong.
4/8 and 3/6. Both of these z= 1/2
First, simplify out the brackets:
-20 - 4n = -12
Then, combine like terms by moving the -20 to the other side
-4n = -12 + 20
-4n = 8
Divide by -4 on both sides to isolate the n
n = 8/-4
n = -2
Answer:
There are 2,598,960 ways to receive 5 cards from a deck of 52.
Step-by-step explanation:
The order in which the cards are chosen is not important, which means that the combinations formula is used to solve this question.
Combinations formula:
is the number of different combinations of x objects from a set of n elements, given by the following formula.

a. How many ways are there to receive 5 cards from a deck of 52?

There are 2,598,960 ways to receive 5 cards from a deck of 52.
Answer:
The number of years to double the lump sum in value is;
N = 72/10 = 7.20
N = 7.20 years
Step-by-step explanation:
Using the rule of 72 for the approximation:
The formula for rule of 72 is;
Number of years to double = 72/interest rate in percentage
Given;
Interest rate = 10%
The number of years to double the lump sum in value is;
N = 72/10 = 7.20
N = 7.20 years