Answer:
100
Step-by-step explanation:
Given :
To Find : the value of expression 5a.
Solution :
We are given the value of 'a' i.e. a=20
Now to find the value of given expression 5a
⇒
put a = 20 in the equation
⇒
⇒
⇒
Thus , The value of expression 5a when a = 20 is 100
Answer:
The price per pound of gummy bears is $3.20 and the price per pound of jelly beans is $7.50
Step-by-step explanation:
Let
x ----> the price per pound of gummy bears
y ----> the price per pound of jelly beans
we know that
-----> equation A
-----> equation B
Solve the system by graphing
Remember that the solution is the intersection point both graphs
using a graphing tool
The solution is the point (3.2,7.5)
see the attached figure
therefore
The price per pound of gummy bears is $3.20 and the price per pound of jelly beans is $7.50
About 1407 sharks would be needed to have a margin of error of 0.25
<h3>What is margin of error?</h3>
Margin of error is used to determine by what value there is deviation from the real value. Margin of error (E) is given by:
The 90% confidence level have a z score of 1.645. Hence for E = 0.25, standard deviation = 5.7 feet, hence:
About 1407 sharks would be needed to have a margin of error of 0.25
Find out more on margin of error at: brainly.com/question/10218601