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.
Hey there,
This is a two-step problem and two equations are involved in figuring out the problems.
Looking at the points you know the y-intercept of both equations but you would need to solve for the slope.
First Step:
= 
The slope of the first equation would be 
now we write it in slope intercept form and get y = x + 1.
Second Step:
Perpendicular lines have slopes that are the negative reciprocal of the original line. So the perpendicular line would have the slope as 
.
The equation would be: y = x - 2
Hope I helped,
Amna
Answer:
-35+7u
Step-by-step explanation:
Answer:
20
Step-by-step explanation:
This reads mathematically exactly how it is stated in words. The word "is" means =, the word "of" means multiply, and "what number" is x. Therefore, the equation from that looks like this: 16 = .80x. Don't forget that you cannot use a percent in an equation without first changing it to its decimal equivalency. Solve that for x by dividing both sides by .80 to get that x = 20
