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SashulF [63]
2 years ago
15

What mistake did this student make?

Mathematics
1 answer:
Novay_Z [31]2 years ago
7 0
X=-2 not 2.


EXPLANATION:

x-2y=12
-3x+y=-1
x-2y=12
2(-3x+y)=-1
x-2y=12
-6x+2y=-2
-5x=10
5x/-5=10/-5
x=-2
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An aircraft factory manufactures airplane engines. The unit cost (the cost in dollars to make each airplane engine) depends on t
Juliette [100K]

Answer:

Minimum unit cost = 5,858

Step-by-step explanation:

Given the function : C(x)=x^2−520x+73458

To find the minimum unit cost :

Take the derivative of C(x) with respect to x

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Set = 0

2x - 520

2x = 520

x = 260

To minimize unit cost, 260 engines must be produced

Hence, minimum unit cost will be :

C(x)=x^2−520x+73458

Put x = 260

C(260) = 260^2−520(260) + 73458

= 5,858

7 0
3 years ago
One side if the labtop is 9.5 inches and the other side is 14 inches. Using the Pythagorean Theron, what is the length of the di
Digiron [165]

(side 1)² + (side 2)² = (diagonal)²

(9.5² + (14)² = (diagonal)²

90.25 + 196 = (diagonal)²

286.25 = (diagonal)²

√286.25 = √(diagonal)²

17 = diagonal

Answer: 17 inches

3 0
3 years ago
Answer for all my points, PLEASEEEEEEEEEEEEEEEEEEEEEEEE
natta225 [31]

Answer:

10/10     10.0

Step-by-step explanation:

5 0
3 years ago
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Which relationship between x and y in the equation shows a proportional relationship?
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Answer:

y = 8x

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5 0
3 years ago
Read 2 more answers
Which mathematical statements are true?
valentinak56 [21]
1. incorrect 
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2.incorrect
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3.correct
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4.Incorrect.
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5. Incorrect
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 6.incorrect
sum of the interior angles of a triangle is 180°. since there are 3 equal angles, 180°/3 = 60°. therefore each angle is 60°.
4 0
2 years ago
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