Answer:
260 seashells
Step-by-step explanation:
If there are 50 seashells on the beach and after one week there are 120 seashells on the beach and this same pattern continues, then the number of sea shells form weekly will form an arithmetic progression.
The sequence formed will be;
50,120...
To find the number of seashells that we will have in the 4th week is equivalent to finding the 4th term of the sequence.
The formula for calculating the nth term of a sequence is as given below;
Tn = a+(n-1)d where;
a is the first term
n is the number of terms
d is the common difference.
According to the sequence;
a = 50,
d = 120-50 = 70
n = 4 (since we are looking for the 4th term)
Substituting this values in the given formula we have;
T4 = 50+(4-1)70
T4 = 50+3(70)
T4 = 50+210
T4 = 260
This means that there will be 260seashells on the 4th week if the same pattern continues.
Answer:
Sarah's statement is false.
Step-by-step explanation:
If a fraction is less than 1, it means that its numerator is less than its denominator.
So, if we multiply two fractions both are less than 1, then, numerators of both the fractions are less than their denominators.
Hence, in the resultant fraction, the numerator is less than the denominator and hence its value is less than 1.
Answer: 
Step-by-step explanation:
It is important to remember that:
- Integers contains the positive numbers (+), negative numbers (-) and zero.
- The numbers greater than zero are Positive Integers.
- The numbers less than zero are Negative integers.
- An integer and its opposite have the same distance from zero, but they are located on opposite sides of the number line.
In this case we know that 
is a Positive Integer, therefore, based on the information mentioned before, we can say that its negative (or its opposite) is:
Answer:
the third one
Step-by-step explanation:
-b to start is -(-6) which is 6
needs the plus and minus
the first expression is the whole numerator
