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tamaranim1 [39]
3 years ago
5

Solve the matrix equation. The inverse of the coefficient matrix is given. EXPLAIN. The answer's D. (2/9,-4/3,-1/3)

Mathematics
1 answer:
Lerok [7]3 years ago
4 0

Answer:

Right answer is D number

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Marysya12 [62]
Since he sells 5 large cards for every 2 small, we can multiply the number of small cards he needs to sell by 2.5 to find how many large cards he needs to sell.

So let x=the number of small cards sold, and 2.5x=the number of large cards sold

The equation is:Total profit=x+(2.5x)

Since a small card is $2.5, a large card is $4, and the total profit will be $10,000 plug those in to make the equation:

10,000=2.5x+4(2.5x)

We can combine the x's to get 10,000=12.5x and then divide both sides by 12.5 to get x=800.

So he needs to sell 800 small cards.

Multiply that by that 2.5.

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Duane has 12 times as many baseball cards as tony. between them they have 208 baseball cards. how many baseball cards does each
omeli [17]
There are a total of 208 cards.  For every one card Tony has, Duane has 12, which means that there are 13 cards in each "set." If you divide the total number of cards (208) by 13, you get 16 "sets."  So out of the total 208 cards, Tony has 16 cards and Duane has 12 times 16 or 192 cards.
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3 years ago
Solve for height using the tangent method. Show your work.
Murljashka [212]

Answer:

b = 17.318    height = 23.318 ft

Step-by-step explanation:

This IS very similar to the other one, Emily..... Have you tried to solve it the same way?

b =   152 tan 6.5  = 17.318 ft      (using a calculator)

    add the height of the victim's head (6 ft)

17.318 + 6 = 23.318 ft

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2 years ago
What is the vertex for the following quadratic?<br> f(x)= 2x^2-12x+16
LenaWriter [7]

Answer:

(3, -2)

Step-by-step explanation:

To find the vertex, put the equation into vertex form by completing the square

2(x^2 - 6x) + 16  [pulling out the 2]

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2(x - 3)^2 - 2 [simplify the equation]

vertex is (3, -2)

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3 years ago
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