50/80 = 0.625
100 - 0.625 = 0.375
0.375 = 37.5% (move the decimal point to the right 2 spaces)
37.5% decrease is your answer
hope this helps
Answer:
the answer is 50
Step-by-step explanation:
let the width be x
the length will be x+5
perimeter=2l+2w
=2x+10+2x
4x+10=30
4x=20
x=5(width)
length=5+5=10
area =length*width
area=10*5=50 squared units
Answer:
The answer is below
Step-by-step explanation:
When renting a car two options listed below are given. You need the car for 3 days. How many miles must you travel in order for option 2 to be the better option? Tell me your variable and what it represents. Then use that variable to set up an equation you can solve to get the answer.
Option 1
Daily fee $50
Cost per mile $0.15
Option 2
Daily fee $65
Unlimited miles
Solution:
The equation of a straight line is given by:
y = mx + b; where m is the slope of the line (that is rate of change) and b is the y intercept (value of y when x is 0).
Let x represent the number of miles travelled in one day and let y represent the total cost incurred for travelling x miles.
Therefore, for option 1, the total cost per day is:
y = 50 + 0.15x (1)
For option 2, the total cost per day is:
y = 65 (2)
Since, we want to determine, how many miles must you travel in order for option 2 to be the better, hence:
65 < 50 + 0.15x
15 < 0.15x
x > 100 miles
Therefore for option 2 to be better, the car must travel more than 100 miles per day.
Answer:
sin trigonometry ratio
Step-by-step explanation:
Given
See attachment for triangles
Required
Explain why
From the attached diagram, both triangles are similar triangles because
(1) the second triangle is a dilation of the first triangle by a ratio of 1.5
i.e
(2) They have angle 30 degrees, and have their right angles located at the same point
In the first triangle, the sine of 30 degrees is represented as:
This gives:
In the second triangle:
So:
By comparison:
Hence: