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2 years ago

SOMEONE HELP ME PLS I DONT UNDERSTAND AND GIVE ONE OF THE SELECTED OPTIONS PLS :)

Mathematics

1 answer:

VLD [36.1K]2 years ago

4 0

X = 130°

they are alternate exterior angles. the one you have highlighted is correct.

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What can be represented by the expression -3 + 3?

Tcecarenko [31]

Answer: Zero

Step-by-step explanation:

If you calculate -3 + 3 you get the answer of zero. Not sure if there is more to the problem.

5 0

3 years ago

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Nonlinear Systems of Equations

zheka24 [161]

The square root and cube root identities are proved.

According to the statement

we have to find that the use of the square root identity (x − y)2 = x2 − 2xy + y2

And use of cube root identity a3 + b3 = (a + b)(a2 − ab + b2).

So, For this purpose, we know that the

A. Let us assume the two conditions.

So,

2x + 3y = 6 -(1)

4x + 7y = 8 -(2)

Here we use elimination method

So, Multiply 4 with (1) and 2 with (2)

8x + 12y = 24

8x + 14y = 16

Now eliminate x from these equations

-2y = 8

here y is -4.

and the x become

2x + 3y = 6

2x -12 = 6

2x = 18

x = 9.

B. For the use of identity $(x- y)^{2} = x^{2} - 2xy + y^{2}$

Let us assume a number 26 and 28 then fill it in the condition then

$(28- 26)^{2} = 28^{2} - 2(28)(26) + 26^{2}$

Then

$(28- 26)^{2} = 784 - 1456 + 676$

$(28- 26)^{2} = 4$

And we have to prove the cube root identity then

The identity is

$a^{3} + b^{3} = (a + b)(a^{2} - ab + b^{2})$

Then let us assume the number 8 and 9 then

$a^{3} + b^{3} = (a + b)(a^{2} - ab + b^{2})$

$8^{3} + 9^{3} = (8 + 9)(8^{2} - 8*9 + 9^{2})$

$8^{3} + 9^{3} = (17)(64 - 72 + 81)$

$8^{3} + 9^{3} = (17)(73)$

$8^{3} + 9^{3} = (1241)$

Hence by this way we prove the square and cube root identities.

So, The square root and cube root identities are proved.

Learn more about square root and cube root here

brainly.com/question/661780

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3 0

1 year ago

0.075 as a fraction

Rudiy27

.075 will be written as 75/1,000. The fraction can then be simplified to the fraction 3/40.

8 0

3 years ago

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A rectangle’s area and perimeter have the same numerical value. The length of the rectangle is 12 units. What is the width of th

Alex_Xolod [135]

Answer:

2.4

Step-by-step explanation:

12x2.4 = 28.8 (Area)

12+12+2.4+2.4 = 28.8 (Perimeter)

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3 years ago

This question is 20 Points and will mark brainliest

Dmitriy789 [7]

Answer:

Step-by-step explanation:

sqrt(x) ≤1

Square each side

x ≤1

But we have to look at the limit on the square root

We know that square root must be greater than or equal to zero so x ≥0

0 ≤x ≤1

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3 years ago

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