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notsponge [240]
3 years ago
13

Please help me with this

Mathematics
2 answers:
kupik [55]3 years ago
6 0
The answer is 4/13 .....
Andru [333]3 years ago
3 0

Answer:

friend correct answer is 4/13

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What’s the height of the trapezoid if the area is 26 ft2?
Elis [28]

Answer:

The height of the trapezoid would be 4 ft.

If you solve this equation,

2*26/5+8 ,

you'll get the answer.

First do the multiplication, then the subtraction, and finally the division.

7 0
3 years ago
If f(x)=1−x^2 +x^3 , then f(−1)=
Andrews [41]

Answer:

f(-1) = -1

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>

  • Functions
  • Function Notation

Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify</em>

f(x) = 1 - x² + x³

f(-1) is <em>x</em> = -1 for the function f(x)

<u>Step 2: Evaluate</u>

  1. Substitute in <em>x</em> [Function f(x)]:                                                                           f(-1) = 1 - (-1)² + (-1)³
  2. Exponents:                                                                                                        f(-1) = 1 - 1 - 1
  3. Subtract:                                                                                                            f(-1) = -1
6 0
3 years ago
A railway engine of mass 4000kg is moving down a track at a constant speed of 3m/s
Vadim26 [7]

Answer:

1 minute
you just have to divide 180m by 3m= 60s

4 0
3 years ago
Read 2 more answers
A sample of final exam scores is normally distributed with a mean equal to 23 and a variance equal to 16. Part (a) What percenta
deff fn [24]

Answer:

Let X = score of final exam.

X~normal(23, 16)

(a)

percentage of score between 19 and 27

= P(19 < X < 27)

= P((19-23) / sqrt(16) < Z < (27 - 23) / sqrt(16))

= P(-1 < Z < 1)

= 1 - P(Z <= -1) - P(Z >= 1)

= 1 - P(Z >= 1) - P(Z >= 1)

= 1 - 2*P(Z >= 1)

= 1 - 2(0.1587)

= 0.6826

= 68.26%

According to Normal Distribution Table

P(Z>=1) = 1 - P(Z<1) = 1-0.8413

So the final percentage is 68.26%

7 0
4 years ago
The mean of the following numbers is 15. 14,10,18,,21,15,14​
Leona [35]

Answer:

= 15.285714285714

Step-by-step explanation:

6 0
3 years ago
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