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3 years ago

1

Mathematics

1 answer:

Artemon [7]3 years ago

3 0

Answer:

x = 4

Step-by-step explanation:

2x − y = 11 ⇒ -y = - 2x +11 ⇒ y = 2x - 11

x + 3y = -5

x + 3(2x - 11) = -5

x + 6x - 33 = -5

+33 +33

7x = 28

÷7 ÷7

x = 4

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Help plz.. x/6-1=1/3(9-3x)

solniwko [45]

Step-by-step explanation:

x/6-1=1/3(9-3x)

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3 years ago

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3 years ago

What fuction respersents a slope of -4 and yintrersection -2?

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4 years ago

The area of a trapezoid is 243cm2. The height is 18cm and the length of one of the parallel sides is 10cm. Find the length of th

Irina18 [472]

Answer:

$Side_2 = 17\ cm$

Step-by-step explanation:

Given

Shape: Trapezoid

$Area = 243cm^2$

$Height = 18cm$

$Side_1 = 10cm$

Required

Determine the length of the second parallel side

The area of a trapezoid is:

$Area = \frac{1}{2}(Side_1 + Side_2) * Height$

Substitute values for Area, Height and Side1

$243 = \frac{1}{2}(10 + Side_2) * 18$

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$2 * 243 = 2 * \frac{1}{2}(10 + Side_2) * 18$

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Hence;

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3 years ago

Let S be the universal set, where: S={1,2,3,...,18,19,20}

just olya [345]

Answer:

A∪B = {1,2,3,4,5,6,7,8,9,11,13,14,15,16,18,20}

A∩B = {1,5,6,7,8,9,11,14,15}

Step-by-step explanation:

A∪B is the elements in A or B. So, for this question, we just need to find the numbers that are in A or B. Remember not to add anything that is not in set A or B and not write the same number twice.

A∩B is the elements in A and B. Therefore, for this question, we just need to find the numbers which appeared in both set A and B.

Hope this helps :)

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3 years ago

Read 2 more answers