Okay, the easiest way
(I personally) find surface area is to find the area of each face
[L x W (OR H)] and then add all of the areas together.
Question 1) The Area of 1 of the faces is 4, because 2 x 2 is 4. Since there is 6 faces, do 6 times 4, or 
feet in total.
<h2>Steps:</h2>
So for this, we will be doing a system of equations. Using the info from our question, our two equations are:
(let x = greater number and y = lesser number)
Now, for this I will be using the substitution method. Since we know that x = 4y - 1, substitute that into the second equation:
From here we can solve for y. Firstly, combine like terms:
Next, subtract 4y on both sides of the equation:
Next, multiply both sides by -1:
Now that we know the value of y, substitute it into either equation to solve for x:
<h2>Answer:</h2>
In short, <u>5 is the lesser number and 19 is the greater number.</u>
5x + 4y = 20
4y = 20 - 5x
y = 20/4 - 5/4x
y = 5 - 5/4x
The x intercept is when y = 0
0 = 5 - 5/4x
5/4x = 5
x = 4.5/5
x = 4
The y intercept is when x = 0
y = 5 - 5/4x
y = 5 - 5/4.0
y = 5
Answer:
<h2>A = 60 in²</h2><h2 />
Step-by-step explanation:
a = 12 in
b = 8 in.
h = 6 in.
<u>plugin values into the formula:</u>
A = 1/2 h(a + b)
A = <u>(12 + 8) </u> x 6
2
A = 60 in²
1. You would do 45 × 3 = 135 miles
2. 630 ÷ 2 = 315. 630 + 315 = 945 miles
3. 54 × 11 = 594 miles
1. Time is distance ÷ speed, so 4760 ÷ 560 = 8 1/2hours
2. 27 ÷ 54 = 0.5 hours, or 30 minutes
3. 1748 ÷ 437 = 4 hours
I hope this helps!
