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agasfer [191]
3 years ago
6

Which choice is equivalent to sqroot-125 PLEASE HELP

Mathematics
2 answers:
hodyreva [135]3 years ago
8 0
The answer is c!!!! :)))
Nina [5.8K]3 years ago
7 0

Answer:

C. 5i \sqrt{5}

Step-by-step explanation:

\sqrt{ - 125}  \\  \\  =  \sqrt{ - 1 \times 125}  \\  \\  =  \sqrt{ - 1}  \times  \sqrt{125}  \\  \\  = i \times 5 \sqrt{5}  \\  \\   \huge \red{ \boxed{= 5i \sqrt{5} }}

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Which expression is equivalent to 6⋅6⋅6?<br><br> 36<br><br> 6³<br><br> 66
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6^3

Step-by-step explanation:

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A grocer sells milk chocolate at $2.90 per pound, dark chocolate at $4.90 per pound, and dark chocolate with almonds at $5.50 pe
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Answer: milk chocolate = 10 pounds

Dark chocolate =15 pounds

Dark chocolate with almonds = 25 pounds.

Step-by-step explanation:

What we have here is a proportion problem.

Milk chocolate = $2.90

Dark chocolate = $4.90

Dark chocolate with almonds = $5.50

We are to have 50 pounds of mixed chocolate

Amount the grocer makes from this

= $4.80 × 50 = $240

However, we must consider how much the grocer would have made if he had sold them separately

Weight of milk chocolate = x

Weight of dark chocolate = y

Weight of dark chocolate with almond = z

x+y = z (according to the question)

x+y+z= 50

Equating the collective amount of each type of chocolate with the amount they all cost together

2.90x + 4.90y + 5.50z = 50(4.80)

2.90x + 4.90y + 5.50z = $240

But z = x + y

2.90x + 4.90y + 5.50 (x+y) = $240

2.90x + 4.90y + 5.50x + 5.50y = 240

8.40x + 10.40y = 240 .....eqn 1

Since x + y + z = 50

x + y = 50 - z

But x+ y = z

x + y = 50 - (x+y)

x + y = 50 - x - y

2x + 2y = 50

(Divide through by 2)

x+y = 25 ...... Eqn 2

y = 25 - x

Substitute for y in eqn2

8.4x + 10.4 (25-x) = 240

8.4x + 260 - 10.4x = 240

8.4x - 10.4x = 240 - 260

-2x = -20

x = 10 pounds

y = 25-x

y = 25-10

y=15pounds

x+y+z= 50

10+15+z= 50

25+z=50

z= 50-25

z = 25

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