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Mekhanik [1.2K]
3 years ago
11

A quilt was originally priced at $25 but went on sale for 20% off. If Pamela bought the quilt and paid 10% sales tax, how much d

id she pay in total?
Mathematics
1 answer:
love history [14]3 years ago
5 0

Answer:

22.20

Step-by-step explanation:

25 × .80 ×1.10=22.20

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What are two fractions equivalent to 5/12
saul85 [17]

Answer:

10/24 and 15/36, more answers possible

Step-by-step explanation:

if you multiply both the numerator and denominator by the same number, it will always be equivalent to 5/12, as you can simplify it back to that fraction.

5/12, multiply both by two, and you have 10/24

5/12, multiply both by three, and you have 15/36

5 0
3 years ago
Given A-<br> 2 2<br> 1 3<br> what is A-¹?
devlian [24]

The inverse of matrix A = \left[\begin{array}{cc}2&2&1&3\\\end{array}\right] is A^{-1} = \frac{1}{4} \left|\begin{array}{cc}3&-2&-1&2\\\end{array}\right|      

The given matrix is A = \left[\begin{array}{cc}2&2&1&3\\\end{array}\right]

The inverse of a matrix is given by

A^{-1} = \frac{1}{|A|} adjA                   ...(1)

Now, determinant of matrix A is

|A| = \left|\begin{array}{cc}2&2&1&3\\\end{array}\right|

= (3)(2) - (2)(1)

= 6 - 2

= 4

Now, adjoint A will be

A_{11} = 3

A_{12} = -1

A_{21} = -2

A_{22} = 2

AdjA = \left|\begin{array}{cc}3&-2&-1&2\\\end{array}\right|

Now, substituting the values of |A| and AdjA in equation (1), we get

A^{-1} = \frac{1}{4} \left|\begin{array}{cc}3&-2&-1&2\\\end{array}\right|        

Therefore, A^{-1} = \frac{1}{4} \left|\begin{array}{cc}3&-2&-1&2\\\end{array}\right|      

Know more about Inverse of Matrix: -brainly.com/question/12442362

#SPJ9

     

7 0
2 years ago
How many times greater is 7 x 10^6 than 4.5 x 10^-1
kipiarov [429]

Let us assume that : 7 × 10⁶ is P times Greater than 4.5 × 10⁻¹

It means when we Multiply P with 4.5 × 10⁻¹, We should get 7 × 10⁶

⇒ (P × 4.5 × 10⁻¹) = 7 × 10⁶

\mathsf{\implies P = (\dfrac{7 \times 10^6}{4.5 \times 10^-^1})}

\mathsf{\implies P = 1.56 \times 10^7}

⇒ 7 × 10⁶ is 1.56 × 10⁷ times Greater than 4.5 × 10⁻¹

4 0
3 years ago
The exam had 60 questions.Phelix got 85% correct. How many questions did he answer correctly?
hichkok12 [17]
Y is 85% of 60

Equation: Y = P% * X

Solving our equation for Y
Y = P% * X
Y = 85% * 60

Converting percent to decimal:
p = 85%/100 = 0.85

Y = 0.85 * 60 
Y = 51
6 0
3 years ago
Read 2 more answers
I need help what is 145 marked up 175%
Ede4ka [16]
First you multiply 145 by 01.75 to get how much you add to the total. You add 253.75 to 145 and get 398.75 as the answer
7 0
3 years ago
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