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Vedmedyk [2.9K]
3 years ago
8

A _____ is a statement that has been proved

Mathematics
1 answer:
krok68 [10]3 years ago
4 0

Answer:

Fact

Step-by-step explanation:

A Fact is a statement that has been proved :)

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Kevin and Randy Muise have a jar containing 80 ​coins, all of which are either quarters or nickels. The total value of the coins
SCORPION-xisa [38]

Answer:

  • 39 quarters and 41 nickels

Step-by-step explanation:

Let the number of quarters be x and nickels be y.

<u>Given:</u>

  • Quarter is 25 cents
  • Nickel is 5 cents
  • Number of coins is 80
  • Total amount is $11.80 = 1180 cents

<u>We have equations:</u>

  • x + y = 80
  • 25x + 5y = 1180

<u>Solve the system by elimination, subtract 5 times the first equation from the second one:</u>

  • 25x + 5y - 5x - 5y = 1180 - 80*5
  • 20x = 780
  • x = 780/20
  • x = 39

<u>Find the value of y:</u>

  • 39 + y = 80
  • y = 80 - 39y = 41

<u>Verify:</u>

  • 25*39 + 5*41 = 975 + 205 = 1180
7 0
2 years ago
6.
Ilia_Sergeevich [38]

Answer:

  • A. 5 to the power of negative 5 over 6

Step-by-step explanation:

  • \sqrt[3]{5} \sqrt{5} /\sqrt[3]{5^5} =
  • 5^{1/3+1/2-5/3}=
  • 5^{1/2-4/3}=
  • 5^{3/6-8/6}=
  • 5^{-5/6}
6 0
2 years ago
So I need to calculate the surface area for each figure. And the base is 6 and Side is 3?
Pie
Area=basexhigh so, Area= 6x3 , so answer will be 18
8 0
3 years ago
I do not need an explanation, just a simple angle number!
Murljashka [212]

Answer:

Step-by-step explanation:

a + 143 = 180    {Linear pair}

a = 180 - 143

a = 37

37 + 93 + b = 180 {Angle sum property of triangle}

130 + b = 180

         b = 180 - 130

         b = 40

c + b = 90

c  + 40 = 90

c = 90 - 40

c = 50

d + 120 = 180   {Linear pair}

d = 180 - 120

d = 60

? = 60 + 40         {Exterior angle property of triangle}

? = 100

3 0
2 years ago
The volume of a single layer in a rectangular prism is 18 cubic centimeters. There are 5 layers in this rectangular prism. What
sweet [91]

Answer: 90cm^3

Step-by-step explanation:

A rectangular prism is a three-dimensional solid.

A rectangular prism has six faces (each one of these faces are rectangles), eight vertices and twelve edges.

You know that this rectangular prism has 5 layers and the volume of one of these layers is 18 cubic centimeters (18cm^3).

Assuming that all these layers are equal, the volume of this rectangular prism can be calculated with:

V_{prism}=5*V_1

Where V_1 is the volume of one layer.

Substituting, you get:

V_{prism}=(5)(18cm^3)\\\\V_{prism}=90cm^3

8 0
3 years ago
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