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Nina [5.8K]
2 years ago
13

Help please please please please

Mathematics
1 answer:
KatRina [158]2 years ago
5 0

Answer: It is a because they are equally reflecting the x axis

Step-by-step explanation:

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2 • -1^3 - 3 • -1^2 +7
sertanlavr [38]

Simplify 1^3 to 1

2 × -1 - 3 × -1^2 + 7

Simplify 1^2 to 1

2 × -1 - 3 × -1 + 7

Simplify 2 × -1 to -2

-2 - 3 × -1 + 7

Simplify 3 × -1 to -3

-2 - (-3) + 7

Simplify brackets

-2 + 3 + 7

Simplify

<u>8</u>

3 0
3 years ago
3. Given the same sample statistics, which level of confidence would produce
Irina-Kira [14]

Answer:

99%, because as the level of confidence​ increases, Zc increases.

Step-by-step explanation:

7 0
2 years ago
A- 13<br> B- 26 <br> C- 52<br> D- there is not enough information
Yakvenalex [24]

Answer:  the anwser is A. 13


7 0
2 years ago
Find a numerical value if one trigonometric function of x if tan2x-sin2x/sin2x=5
seropon [69]

Answer:

The values of x that satisfy the given equation are:

x1 = 1.183 + nπ

x2 = -1.183 + nπ

Step-by-step explanation:

Given tan²x - sin²x/sin²x = 5

Simplifying this, we have

tan²x - 1 = 5

Adding 1 to both sides, we have

tan²x = 6

Because tan²x = (tanx)², we can write as

(tanx)² = 6

Taking square roots of both sides, we have.

tanx = ±√6

x = arctan(±√6) + nπ

≈ 1.183 + nπ or -1.183 + nπ

4 0
3 years ago
I only need help with #10 :) offering 10 pts
Semenov [28]

Answer:

The length of one side of the square is 3.

Step-by-step explanation:

The perimeter of any given shape is all of the sides added together. So, the perimeter of the triangle is 5x + 4x + 3x. Added together, 12x.

The perimeter of the square is (x + 2)*4. Distributed, it's 4x + 8. Since we know they're equal, set it up like this:

12x = 4x + 8

You then find that x = 1. Plug that into one side of the square, x + 2, to get 3.

8 0
3 years ago
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