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Oliga [24]
2 years ago
11

Work out the surface area of this cylinder 8cm diameter 16.8cm height

Mathematics
1 answer:
zimovet [89]2 years ago
5 0
Surface area: 522.76cm
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One month Yoko rented 3 movies and 5 video games for a total of $40. The next month she rented 9 movies and 7 video games for a
KATRIN_1 [288]

Answer:

  • movie: $3.75
  • video game: $5.75

Step-by-step explanation:

Two equations in two unknowns can be written:

  3m +5v = 40

  9m +7v = 74

These can be solved a variety of ways. One of them is using Cramer's rule. It tells you the solution to

  • ax +by = c
  • dx +ey = f

is given by ...

  • ∆ = bd -ea
  • x = (bf -ec)/∆
  • y = (cd -fa)/∆

For the numbers above,

  • ∆ = 5·9 -7·3 = 24
  • m = (5·74 -7·40)/24 = 90/24 = 3.75
  • v = (40·9 -74·3)/24 = 138/24 = 5.75

The rental cost for each movie is $3.75; for each video game, it is $5.75.

___

The attached graph shows a graphing calculator solution to these equations.

5 0
3 years ago
there are 27 red or blue marbles in a bag. The number of red marbles is 5 less than 3 times the number of blue marbles. How many
Natasha2012 [34]
8 blue marbles and 19 red
7 0
3 years ago
What two numbers has a gcf of 2 and a lcm of 60?​
Monica [59]

GCF - Greatest Common Factor

The numbers with a GCF of 2:

2 & 4, 2 & 8, 26 & 46...

LCM -Least Common Multiple

Numbers with an LCM of 60:

15 & 4, 12 & 5...

Hope it helps! :-)

Answered by

*GraceRosalia*

5 0
2 years ago
Plz help fast! worth 100 points ​
zloy xaker [14]

An equilateral triangle sides are all equal to each other. This means that is one side of an equilateral triangle is x + 3 then the sides of the other two triangles as also each x + 3

The formula for perimeter of a triangle is:

Perimeter = side 1 + side 2 + side 3

Or in the case of an equilateral triangle it would be:

Perimeter = 3(side)

This means that for the formula of this equilateral triangle you have:

Perimeter = 3(x + 3)

If asked the three out side of the parentheses can be distributed, meaning that you multiply the outside number (in this case that is 3) to all the number inside the parentheses (in this case that is x and 3)

Perimeter = (3 * x) + (3*3)

Perimeter = 3x + 9

Both of these are correct:

P = 3(x + 3)

P = 3x + 9

Hope this helped!

~Just a girl in love with Shawn Mendes

6 0
3 years ago
Read 2 more answers
F(x) = 2x^2 - 3x + 1
-BARSIC- [3]

Answer:

The graph looks like a U

Step-by-step explanation:

6 0
3 years ago
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