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Naddik [55]
2 years ago
10

The sum of three numbers is 72. One number is two times 10 and another number is three times 10. What is the third number?

Mathematics
2 answers:
noname [10]2 years ago
8 0
The third number is 20
dusya [7]2 years ago
8 0
The third number is 22
Explanation: If you multiply 10 by 2 you get 20 and if you multiply 10 by 3 you get 30. Add those together and you get 50. Then you subtract 50 from 72 and you would get 22... I hoped this helped!
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the vet says that lena's puppy will grow to be at most 28 inches tall. lena's puppy is currently 1foot tall. how many more inche
GenaCL600 [577]
16, because 1 foot is 12 inches, so 28 - 12 = 16
4 0
3 years ago
a swimming pool is 20 meters long and 12 meters wide. what volume of water does the pool hold if the average depth of water is 1
ser-zykov [4K]

Answer:

420 meters

Step-by-step explanation:

to find volume for a rectangular shape you need to do length×Width×Height

In this problem the...

Length=20

Width=12

and depth which is same as height=1.75

To find the volume you just have to do 20×12×1.75

4 0
2 years ago
A gem cutter cuts a polyhedral crystal from a garnet gemstone. The crystal has 10 fewer vertices than edges and twice as many ed
Vikki [24]

Answer:

vertices (V) = 6, faces (F) = 12 and edges (E) = 16

Step-by-step explanation:

A polyhedron is a three-dimensional shape with straight edges and flat faces and sharp corners.The point where the faces of a polyhedron meet each other is known as the edge while the corners of the polyhedron is known as the vertices.

Euler formula gives the relationship between the number of vertices (V), faces (F) and edges (E) of a polyhedron. This formula is given as:

F + V - E = 2.

Given that:

E - V = 10, Therefore E = V + 10

F = 2 × V = 2V

Substituting into the Euler formula:

2V + V - (V + 10) = 2

2V + V - 10 - V = 2

2V = 12

V = 12/2 = 6

Therefore, E = V + 10 = 6 + 10 = 16

F = 2V = 2 × 6 = 12

3 0
3 years ago
Please help me with this question. Algebra 2 is hard!!
trapecia [35]

Answer:

  • domain: {x ∈ ℝ : x ≤ 5}
  • range: {y ∈ ℝ : y ≤ -1}

Step-by-step explanation:

<u>Domain</u>

The domain of a function is the set of x values for which the function is defined. Here, the domain is limited by the values of x that make the square root defined. That is, the expression under the radical cannot be negative:

  -3x +15 ≥ 0

  15 ≥ 3x . . . . . . add 3x

  5 ≥ x . . . . . . . . divide by 3

  x ≤ 5 . . . . . . . . put x on the left (swap sides)

The rest of the notation in the domain expression simply says x is a real number.

  domain: {x ∈ ℝ : x ≤ 5} . . . . . . matches the first choice

__

<u>Range</u>

The range of a function is the set of values that f(x) can have. We know the square root can be zero or any positive number. When it is zero, f(x) = -1.

When it is a positive number, that value is multiplied by -4 and added to -1, so f(x) is a number more negative than -1. Then the range of the function is all numbers -1 and below:

  range: {y ∈ ℝ : y ≤ -1} . . . . . . matches the last choice

_____

<em>Comment on domain/range problems</em>

When working domain and range problems, it works well to have a good understanding of the domain and range limitations of the functions we usually work with: polynomials, square root, logarithm, trig functions, exponential functions. Domain and range problems generally involve combinations of these or ratios of combinations of these.

3 0
3 years ago
Evaluate ((6+2) ÷ (10-8) +10) ∙ 5
miskamm [114]
You can do that on photo math
5 0
3 years ago
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