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alexandr1967 [171]
3 years ago
15

Whether it’s 74.89, 30.29, 38.16 or 66.73

Mathematics
1 answer:
My name is Ann [436]3 years ago
5 0

Let l be the length of one leg, and h be the length of the hypothenuse. Finally, let \alpha be the measure of the angle between them. Then, the following relation holds:

l = h\cos(\alpha)

Plugging your values, we have

34 = x\cos(27)

Solving for x, we have

x = \dfrac{34}{\cos(27)} \approx 38.16

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Can anyone help pls two more
Andreas93 [3]

Answer:

I'll explain below, just follow the directions. I can't directly draw it.

Step-by-step explanation:

find the length and the width of a rectangle whose perimeter is 18 ft

2L + 2W = 18

simplify, divide by 2

L + W = 9

L = (9-W)

:

whose area is 20 square feet

L*W = 20

Replace L with (9-W)

 

W(9-W) = 20

-W^2 + 9W - 20 = 0

Multiply by -1, easier to factor

W^2 - 9W + 20

Factors to

(W-4)(W-5) = 0

Two solutions

W = 4 ft is width, then 5 ft is the Length

and

W = 5 ft is the width, then 4 ft

5 0
3 years ago
If f(x) = -5x + 11 and f(n) = 21, what is the value of n?
Lilit [14]

Answer:

n = -2

Step-by-step explanation:

21 = -5x + 11

10 = -5x

n = -2

8 0
3 years ago
Plz help in a rush!!!!!!!!!!
Bogdan [553]
Your answer is 4.7

Using the Pythagorean Theorem, you can find the length of the missing side:

a^{2}+b^{2}=c^{2}\\(3)^{2}+b^{2}=(5.6)^{2}\\9+b^{2}=31.36\\b^{2}=22.36\\b=\pm \sqrt{22.36}
Length cannot be negative, so your answer is:
b=\sqrt{22.36}=4.728636...\\\\b=4.7
5 0
4 years ago
Read 2 more answers
(6x2 - 10x +9)+(-5x2 + 9x-5)=
arsen [322]

Answer:

x² - x + 4

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

<u>Algebra I</u>

  • Terms/Coefficients

Step-by-step explanation:

<u>Step 1: Define</u>

(6x² - 10x + 9) + (-5x² + 9x - 5)

<u>Step 2: Simplify</u>

  1. Combine like terms (x²):                                                                                x² - 10x + 9 + 9x - 5
  2. Combine like terms (x):                                                                                  x² - x + 9 - 5
  3. Combine like terms (Z):                                                                                     x² - x + 4
6 0
3 years ago
Derek measured the height of a window frame as 5.49 feet, but the actual height was 6 feet. What is the percentage of error in D
Dvinal [7]
The percentage of error in deters measurement is 8.50%

6 - 5.49 = 0.51%
100% = .51/6
100% = 8.5%
5 0
3 years ago
Read 2 more answers
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