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siniylev [52]
4 years ago
13

Simplify the expressions1.) 6(–2y) – 9 + 4(–2y + 6) 2.)5(b – 4) + 12

Mathematics
1 answer:
GarryVolchara [31]4 years ago
3 0

Answer:

1.) -20y+15

2.)5b-8

just expand the brackets!!!❤️

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5 0
3 years ago
A thread is wound 200 times round a reel of diameter 5 cm. Use the value 3 for it to find the approximate length of the thread i
Radda [10]

Answer:

Length of the thread = 30 metres

Step-by-step explanation:

Length of the thread in one round of a reel = Circumference of the reel

                                                                    C = 2\pi r

Since radius of the reel = \frac{\text{Diameter}}{2}

                                       = \frac{5}{2}

                                       = 2.5 cm

Circumference of the reel = 2(π)(2.5)

                                           = 5π

                                           = 5×3

                                           = 15 cm

Length of the thread wound in one round around the reel = 15 cm

Since, thread is wound 200 times round a reel, length of the thread

= 200 × 15                                                      

= 3000 cm

≈ 30 metres

Therefore, Option (B) will be the answer.

0 0
3 years ago
What is a prime in coordinates
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When you have a point A and then transform it using a linear transformation (like rotation, reflections, etc.), we mark it as A' to say, "This is the point which corresponds to A after the transformations were applied". This establishes a link between the two, even though they may appear to be unrelated to someone looking at the graph.
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3 years ago
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Mako’s goal is to save $42. He currently has $2 and plans to save $18 per week. Let x represent the number of weeks Mako saves m
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take them seriously, they weren't a joke

7 0
3 years ago
What is the slope of a line perpendicular to the line passing through (-23, 8) and (12, -17)
Radda [10]

Answer:

m=\frac{7}{5}

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Order of Operations: BPEMDAS

<u>Algebra I</u>

  • Slope Formula: m=\frac{y_2-y_1}{x_2-x_1}
  • Slope of a perpendicular line is the negative reciprocal of the original

Step-by-step explanation:

<u>Step 1: Define</u>

Point (-23, 8)

Point (12, -17)

<u>Step 2: Find slope </u><em><u>m</u></em>

  1. Substitute:                    m=\frac{-17-8}{12+23}
  2. Subtract/Add:               m=\frac{-25}{35}
  3. Simplify:                        m=\frac{-5}{7}

<u>Step 3: Find perpendicular slope </u><em><u>m</u></em>

  1. Take negative:          m=\frac{5}{7}
  2. Take reciprocal:        m=\frac{7}{5}

And we have our final answer!

7 0
3 years ago
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