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Colt1911 [192]
3 years ago
13

Answer this please...

Mathematics
1 answer:
Airida [17]3 years ago
8 0

Answer:

The third one:

8 {(5 * 3) + (2 * 5)} + (2 * 10)

Step-by-step explanation:

8$ / h & 10$ extra for work past 6 PM

To find how much he gets paid you need to multiply the amount he gains per hour (here it's 8$), and multiply it by the amount of hour he works. Than add the extra money he makes (here 10$ for each time he worked past 6 PM)

. For 5 days he worked for 3 hour on each of these days => 5 days * 3 hours = Total amount of hours he worked for these 5 days

. For other 2 days he worked for 5 hours on each of these days => 2 days * 5 hours = Total amount of hours he worked for these 2 days

. .  $/h {(Total of hours worked for 5 days) + ( Total of hours worked for 2 other days)} + (Extra money made because for 2 days he worked past 6 PM)

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Solve the simultaneous equations 5x+4y = 1 and 3x - 6 y = 2.
hjlf

x=31​,y=−61​

Put the equations in standard form and then use matrices to solve the system of equations.

5x+4y=1,3x−6y=2

Write the equations in matrix form.

(53​4−6​)(xy​)=(12​)

Left multiply the equation by the inverse matrix of (53​4−6​).

inverse((53​4−6​))(53​4−6​)(xy​)=inverse((53​4−6​))(12​)

The product of a matrix and its inverse is the identity matrix.

(10​01​)(xy​)=inverse((53​4−6​))(12​)

Multiply the matrices on the left hand side of the equal sign.

(xy​)=inverse((53​4−6​))(12​)

For the 2×2 matrix (ac​bd​), the inverse matrix is (ad−bcd​ad−bc−c​​ad−bc−b​ad−bca​​), so the matrix equation can be rewritten as a matrix multiplication problem.

(xy​)=(5(−6)−4×3−6​−5(−6)−4×33​​−5(−6)−4×34​5(−6)−4×35​​)(12​)

Do the arithmetic.

(xy​)=(71​141​​212​−425​​)(12​)

Multiply the matrices.

(xy​)=(71​+212​×2141​−425​×2​)

Do the arithmetic.

(xy​)=(31​−61​​)

Extract the matrix elements x and y.

x=31​,y=−61​

5 0
4 years ago
Read 2 more answers
Find the surface area of the rectangular prism (above) using its net (below).
Lesechka [4]

Answer:

48 units sq

Step-by-step explanation:

Find the area of each square/rectangle

2x2

2x5

2x5

2x5

2x2

2x5

Add all the parts together

4 + 10 + 10 + 10 + 4 + 10

= 48 units sq

6 0
2 years ago
Concrete can be purchased by the cubic yard. How much will it cost to pour a slab 15 feet by 15 feet by 3 inches for a patio if
DerKrebs [107]

The answer is C. $95.83. To get the answer, you need to convert all units into yard first. Then, multiply all the given numbers having a result of 2.0827 cubic yards. Lastly, multiply the result to the concrete cost of $46. So the cost to pour a slab for a patio is $95.83.

8 0
3 years ago
Ryan is opening up a bookstore, where he sells both new and old books. He
Bas_tet [7]

Answer:

Ryan's  revenue last month if he sold 16 new books and 25 old books

 is  $337.50.

Step-by-step explanation:

The number of old books sold by Ryan = 25

The cost of each old book = $5.50

⇒ Total amount earned by selling 25 old  books = 25 x $5.50

                                                                                  =  $137.5

The number of new books sold by Ryan = 16

The cost of each new book = $12.50

⇒ Total amount earned by selling 16 new  books = 16 x $12.50

                                                                                  =  $200

Hence Total amount earned by Ryan

= Amount earned by selling old books + Amount by selling new books

=  $137.5 +  $200

= $337.50

or,  Total amount earned by Ryan = $337.50

Hence Ryan's  revenue last month if he sold 16 new books and 25 old books  is  $337.50.

8 0
3 years ago
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What would be the most appropriate domain for the functions
aivan3 [116]

Answer:

Plz subscribe my Gaming channel Sameer Duos

Step-by-step explanation:

The correct answer is whole number

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3 years ago
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