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Elena-2011 [213]
3 years ago
12

Solve the system of equations x - y = 12 and x + 7y = -20 by combining the equations.

Mathematics
2 answers:
svetoff [14.1K]3 years ago
8 0

Answer:

x= 8, y= -4

Step-by-step explanation:

You can subtract one equation by another to eliminate x

(x-y)-(x+7y)=12-(-20)

-8y = 32

y= -4

Substitute y =  -4 in the first equation:

x-(-4) = 12

x =8

iogann1982 [59]3 years ago
7 0

Answer:

x=16, y=-4

Step-by-step explanation:

-1(x-y=12)

x+7y=-20

-x+y=-12

x+7y=-20

8y=-32

y=-4

x-4=12

x=16

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Step-by-step explanation:

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The area of a triangle is 3.6 cm2. If the triangle has a base of 6 cm, what is the height?
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The area of a triangle can be calculated using the following equation:

A = 1/2 (B x H)

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Since the area is known and the dimension of the base is also known, substitute the values into the equation to find the height:

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A product is made up of three parts that act independently of each other. If any of the parts is defective, the product is defec
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Answer:

The probability that a product is defective is 0.2733.

Step-by-step explanation:

A product consists of 3 parts. If any one of the part is defective the whole product is considered as defective.

The probability of the 3 parts being defective are:

P (Part 1 is defective) = 0.05

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Compute the probability that a product is defective as follows:

P (Defective product) = 1 - P (non-defective product)

= 1 - P (None of the 3 parts are defective)

= 1 - P (Part 1 not defective) × P (Part 2 not defective) × P (Part 1 not defective)

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Thus, the probability that a product is defective is 0.2733.

3 0
3 years ago
Read 2 more answers
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Pls someone help me with this​
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