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MrRissso [65]
3 years ago
6

Help will give 20 points!

Mathematics
2 answers:
podryga [215]3 years ago
6 0

Answer: What do you need help with?

Step-by-step explanation: I can help with anything.

kvasek [131]3 years ago
6 0

Answer:

help with what i don't see a picture

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A section of a railway has a slope of approximately 0.47. In this section, a vertical change of 1 unit corresponds to a horizont
ioda

Step-by-step explanation:

A slope of 0.47 means that, for every 100 feet of horizontal change, the vertical rise = 47 feet

We can use a proportion here

0.47 / 1 = 1 / x

Cross-multiply

0.47x = 1*1

0.47x = 1

Divide both sides by 0.47

x = about 2.13 units

7 0
3 years ago
Completely simplify the rational expression LaTeX: \frac{7x}{3y} + \frac{12x}{9y}
irina [24]

Answer:

\frac{11x}{3y}

Step-by-step explanation:

\frac{7x}{3y} + \frac{12x}{9y}

To add the two fractions, you need a common denominator.  In this case, the lowest common denominator (LCD) is 9y.  That's because 9y is divisible by both 3y and 9y.

The first fraction must be changed so that its denominator is 9y.  Do this by multiplying both numerator and denominator by 3.

\frac{7x}{3y}\cdot\frac{3}{3}+\frac{21x}{9y}=\frac{21x}{9y}+\frac{12x}{9y}\\=\frac{21x+12x}{9y}\\=\frac{33x}{9y}

Finally, this answer can be simplified ("reduced") by dividing both numerator and denominator by 3, their greatest common factor.

3 0
3 years ago
Find a quadratic equation whose roots are -3 and 5
Natasha2012 [34]

Answer:

  • x² - 2x - 15 = 0

Step-by-step explanation:

<u>Roots:</u>

  • x₁ = -3, x₂ = 5

<u>The equation:</u>

  • (x - x₁)(x - x₂) = 0
  • (x - (-3))(x - 5) = 0
  • (x + 3)(x - 5) = 0
  • x² + 3x - 5x - 15 = 0
  • x² - 2x - 15 = 0
3 0
3 years ago
Read 2 more answers
In a class of 50 students, the number of students who offer Accounting is twice as the number who offer Economics. 10 students o
liraira [26]

Answer:2 5 student offeres accounting 3 1 offer from economics  and i don't know the rest  

Step-by-step explanation:

8 0
3 years ago
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What is the circumference of a circle with a radius of 5.8 centimeters?
Vladimir [108]

Step-by-step explanation:

Radius (r) = 5.8 cm

circumference (c)

= 2πr

= 2 * 3.14 * 5.8

= 36.424

= 36.42 CM

Hope it will help :)

4 0
3 years ago
Read 2 more answers
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