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Anna007 [38]
2 years ago
12

A store sells almonds for $7 per pound, cashews for $10 per pound, and walnuts for $12 per pound. A customer buys 12 pounds of m

ixed nuts consisting of almonds, cashews, and walnuts for $118. The customer buys 2 more pounds of walnuts than cashews. The matrix below represents this situation.
If the reduced row echelon form of this matrix represents the amount of each type of nut the customer buys, which statement is a possible interpretation of the results?
Mathematics
1 answer:
shepuryov [24]2 years ago
5 0

Answer:

b

Step-by-step explanation:

I did it on edge 2021

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Use Cramers Rule to solve the system <br> 2x - 3y = 11<br> -6x + 8y = 34
Nastasia [14]

Step-by-step explanation:

given :

2x - 3y = 11

-6x + 8y = 34

find : the solutions of the system by using Cramers Rule.

solutions:

in the matrix 2x2 form =>

[ 2 -3] [x] [11]

=

[-6 8] [ y] [34]

D =

| 2 -3 |

|-6 8 |

= 8×2 - (-3) (-6)

= 16-18 = -2

Dx = | 11 -3 |

| 34 8 |

= 11×8 - (-3) (34)

= 88 + 102

= 190

Dy = | 2 11 |

|-6 34 |

= 2×34 - (-6) (11)

= 68 + 66

= 134

x = Dx/D = 190/-2 = -95

y = Dy/D = 134/-2 = -67

the solutions = {-95, -67}

8 0
3 years ago
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Answer the following.
Assoli18 [71]

Answer:

40000

Step-by-step explanation:

Simple interest (I) is calculated as

I = \frac{PRT}{100}

P is the amount borrowed , R is the interest and T the time in years

Here I = 2000 , R = 5 and T = 1 with P to be found , then

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5P = 200000 ( divide both sides by 5 )

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3 years ago
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The aquarium has 3 more yellow fish than green fish. 60 percent of the fish are yellow. How many green fish are in the aquarium?
balu736 [363]

Answer:

6 green fish

Step-by-step explanation:

green fish = x

(X+3)/60  =  x/40

Cross multiplication

60x = 40x+120

subtract 40x on both sides

20x = 120

Divide both sides by 20

x=6

The aquarium has 3 more yellow fish than green fish  6+3 = 9 (9 yelow)

15 fish in total

60% of 15 = 9

40% of 15 = 6

8 0
3 years ago
A catalog of scientific equipment states that the lens of a particular telescope has a circumference of 6.28 yards. What is the
nexus9112 [7]

The area of lens is 3.14 square yards.

Step-by-step explanation:

Given,

Circumference of lens = 6.28 yards

Circumference = 2πr

6.28=2*3.14*r\\6.28=6.28r\\6.28r=6.28

Dividing both sides by 6.28

\frac{6.28r}{6.28}=\frac{6.28}{6.28}\\r=1

Area of lens = πr²

Area of lens = 3.14*(1)^2=3.14*1

Area of lens = 3.14 square yards

The area of lens is 3.14 square yards.

Keywords: area, circumference

Learn more about area at:

  • brainly.com/question/10414011
  • brainly.com/question/10483199

#LearnwithBrainly

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4 years ago
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