31 +31 + 17+17 = 96 feet around the whole room
96 / 8 = 12
he will need to buy 12
Answer:
The amount invested at 4% is $20,500 and the amount invested at 10% is $500
Step-by-step explanation:
Let
x -----> the amount invested at 4%
(21,000 -x) ----> the amount invested at 10%
we know that
The interest of the amount invested at 4% plus the interest of the amount invested at 10% must be equal to $870
so
Solve for x
therefore
The amount invested at 4% is $20,500 and the amount invested at 10% is $500
Answer:
x = - 2√2
x = -2
Step-by-step explanation:
A . 5 + x² = 2 x² +13
5 + x² - 2 x² - 13 = 0
- x² -8 = 0
- x² = 8
x² = -8
x = - √8
x = - 2√2
B . 5 + x³ = 2 x³ + 13
5 + x³- 2 x³ - 13 = 0
- x³ -8 = 0
-x³ = 8
x³ = -8
x = - ∛8
x = -2
Answer:
<h2>4 ft x 7 ft = 28 sq ft
</h2>
Step-by-step explanation:
Assuming that each section is rectangular, each area can be found with
Where is width and is length.
Notice that the area of each section is found with the product of width and length, that means the right answer must be a product.
Therefore, the right answer is the second choice.
Answer:
54
Step-by-step explanation:
50+53+52+68+54+49+55+51=432
432/8=54