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valentina_108 [34]
3 years ago
6

Which expression is equivalent to 4 (3n - 5)?

Mathematics
1 answer:
Fynjy0 [20]3 years ago
4 0
12n - 20 is the answer
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A metal bar has the D of 7.9 g/mL. If the volume of the bar is 500mL, what is the mass in kg?​
morpeh [17]

Answer:

It will be 0.5kg cuz kg and liters are same

8 0
3 years ago
How many distinct diagonals of a convex heptagon (7-sided polygon) can be drawn?
valkas [14]

The convex heptagon has 14 distinct diagonals can be drawn

Step-by-step explanation:

A polygon is said to be a heptagon if it has 7 vertices, 7 sides and 7 angles. A heptagon is called a convex heptagon if the lines connecting any two non-adjacent vertices lie completely inside the heptagon

The formula of number of diagonals in any polygon is d=\frac{n(n-3)}{2} , where

  • d is the number of the diagonals of the polygon
  • n is the number of sides of the polygon

∵ The heptagon has 7 sides

∴ n = 7

∵ The number of diagonals = \frac{n(n-3)}{2}

- Substitute n by 7 in the rule above

∴ The number of diagonals = \frac{7(7-3)}{2}

∴ The number of diagonals = \frac{7(4)}{2}

∴ The number of diagonals = \frac{28}{2}

∴ The number of diagonals = 14

The convex heptagon has 14 distinct diagonals can be drawn

Learn more:

You can learn more about the polygons in brainly.com/question/6281564

#LearnwithBrainly

4 0
3 years ago
Two squares were used to form a figure. The side lengths of each square is shown.
olasank [31]

Answer:

48

Step-by-step explanation:

8*8 = 64 (big square)

4*4 = 16 (shaded square)

64 - 16 = 48

6 0
2 years ago
How do you solve this using special right triangle this is geometry
svlad2 [7]

Hello from MrBillDoesMath!

Answer:

11.1

Discussion:

cos(42) = x / 15    =>   multiply both sides by 15

x = 15 * cos(42)    => as cos(42) = .743 approx

x = 15 * (.743)

x = 11.15

Thank you,

MrB

3 0
3 years ago
What statement about 6x^2+7x-10 is true
nasty-shy [4]
One of the factors is (x+2)
5 0
3 years ago
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