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balandron [24]
3 years ago
15

Find the sum 12x²+9x²

Mathematics
2 answers:
DIA [1.3K]3 years ago
6 0
21x squared, just add the numbers together
Harman [31]3 years ago
4 0

Answer:

21 x^2

Step-by-step explanation:

12x²+9x²

Since they are like terms (both have x^2) we add them together

21 x^2

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A department store has a discount on shoes based on a percentage of the price. Suppose one pair of shoes is marked down from 80
AysviL [449]

Answer:

Discounted price = $160

Step-by-step explanation:

Let x be the discounted price of shoes.

Given:

A department store has a discount on shoes based on a percentage of the price.

and marked down on one pair of shoes is $80 to $64.

So, the discounted rate = 80 - 64 = 16

therefore, the percent of discount is.

% value  =\frac{discounted\ rate}{original\ rate}\times 100

% value  =\frac{16}{80}\times 100

% value =\frac{16\times 100}{80}

% value =\frac{16\times 10}{8}

% value =2\times 10

% value = 20%

Find the price for a $200 pair of shoes after the same discount is applied.

So the discount is 20% and the discounted price of the shoe is 80% of $200.

% value  =\frac{discounted\ price}{original\ price}\times 100

80 =\frac{x}{200}\times 100

x=\frac{80\times 200}{100}

x=80\times 2

x = $160

Therefore, the discounted price of the shoe is $160.

4 0
4 years ago
Solve these for points<br> I5 - 9I = <br> I5I - I9I =
Aleksandr-060686 [28]
|5-9| = 4

|5| - |9| = -4
4 0
4 years ago
Read 2 more answers
Solve for x.<br> 7 inches<br> Х<br> 11 inches
jonny [76]

Answer:

8.49 inches

Step-by-step explanation:

x^2 + 7^2 = 11^2

x^2 + 49 = 121

X^2 = 121 - 49

x^2 = 72 (then take square root on both sides)

x = 8.49 inches

7 0
4 years ago
The quotient of n and 7 is 39
Harrizon [31]
N = 273

273 / 7 = 39
Dividend / divisor = quotient


Work Backwards:

n/7 = 39
n = 39 X 7
n = 273
8 0
3 years ago
A cylindrical tank is filled with 66.85 mm3 of fuel. The area of the base of the cylinder is 15 mm2. What is the height of the f
Rashid [163]
Volume = (Area of the base)x(Height)
66.85 = 15(H)
66.85/15 = H
H = 4.4567

The height is 4.4567mm.
3 0
4 years ago
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