Answer:
See below.
Step-by-step explanation:
To find the surface area, find the area of the square base and add it to the area of each triangle face. Find the area of the base by multiplying base length by base length. Find the area of each triangle face by multiplying 1/2 * b*h.
Example:
For a base which is 12 by 12. The area is 12 x 12 = 144.
For the triangle face, the area is 1/2 * 12 * 15 = 90. Since there are 4 faces, the total area is 4 * 90 = 360.
Together the surface area is 360 + 144 = 504.
<u>1) </u> 
2) Rectangular shape is square shape patio !
<u>Step-by-step explanation:</u>
Here we have , the area of Bianca’s rectangular backyard patio is represented by the expression x2 – 18x + 81, and the length of the patio is represented by the expression x − 9: We need to find
1. what is the expression for the width of the patio? Explain and show all work.
We know that area of rectangle = 
⇒ 
Factorizing RHS:
⇒ 
⇒ 
⇒ 
⇒
2. what special rectangular shape is the patio?
Now , we see that
A rectangle whose length & width are equal is known as a square ! Hence , Rectangular shape is square shape patio !
a .
16.000x9x5 over 100 is the answer :)
Answer: He will have 3750 in 5 years.
Step-by-step explanation: You need to do 500x1.5x5=3750! 500 dollars is the amount in the account. 1.5 is the interest. 5 is the amount of years.
Let x be the number of $5 items sold.
Let y be the number of $25 items sold.
x + y = 150
x = 150 - y .........(1)
5x + 25y = 1950 ......(2)
Plugging the expression for x from (1) into (2), we get:
5(150 - y) + 25y = 1950
750 - 5y + 25y = 1950
20y = 1200
y = 60 items.
The answer is, there were 60 items sold at $25.
