Answer:
The length is 7 m
The width is 10 m
Step-by-step explanation:
length = x
width = 2x - 4
length * width = area
It is given that the area is 70 
From there
x * (2x - 4) = 70
- 4x = 70
- 4x - 70 = 0
- 2x - 35 = 0
Now we have a quadratic equation, which is a + bx + c = 0, where a 
0
In this equation a = 1, b = -2 and c = -35
Discriminant (D) formula is b² - 4ac
D = 
- 4 * 1 * (-35) = 144 > 0
This discriminant is more than 0, so there are two possible x
Their formulas are 
and 
= 
= -5 < 0 (the length of the rectangle has to be more than 0, so we don't use this x)
= 
= 7 > 0 (this one is right)
Calculating the dimensions
length = x = 7 (m)
width = 2x - 4 = 2 * 7 - 4 = 10 (m)
Answer: Answer = B 32 cubic units
Step-by-step explanation:
Answer is B on Edge
Answer:
1,360 beats when she is resting
Step-by-step explanation:
17 times per 15 seconds in a 20 minute span
how many 15 seconds are in 60 seconds.
There is 4 periods of 15 minutes in one minute
17 * 4 = 68
68 * 20 = 1360
I think that is correct
The domain is the charity amount and range is the donation.
<h3>How to find the domain and range?</h3>
The collection of all x values, or independent quantity, for which the function f(x) exists or is defined, is known as the domain. Range is the collection of all y values, the dependent quantity, that are produced when all x values (the domain) are substituted into the function. All x and y values that could be used to solve the inequality are referred to as the domain and range, respectively. A solution is any set of values that could be used to prove the inequality.
Given: The amount to be donated is 250 dollars and half of the charity amount.
Let x= donation amount and y= charity amount
This can be written as x= f(y) where x= 250+y/2
Thus since domain is an independent variable therefore charity is the domain and range being the dependent variable, donation would be considered as range.
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