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Minchanka [31]
4 years ago
12

Is 4/19 a rational number?

Mathematics
1 answer:
xz_007 [3.2K]4 years ago
5 0

no because 4/19 is 0.21052631578 and that is irrational.

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Dina and Masha started out on a 10 km bike path at the same time. When Dina reached the end of the 10 km, Masha still had 2 km t
german

Answer:

4 km/h

Step-by-step explanation:

We are told that Dina and Masha started out on a 10 km bike path at the same time.

Dina's biking speed is 5 km/h.

Let us find taken by Dina to cover 10 kn distance.

\text{Time}=\frac{\text{Distance}}{\text{Speed}}

\text{Time taken by Dina to cover 10 km}=\frac{10km}{5\frac{km}{hr}}

\text{Time taken by Dina to cover 10 km}=\frac{10km}{5}\times \frac{hr}{km}}

\text{Time taken by Dina to cover 10 km}=2hr

Therefore, Dina took 2 hours to complete 10 km.

Since both started at the same time, therefore, Masha also took 2 hours to complete 2 km less than Dina.

Let us find distance covered by Masha.

\text{Distance covered by Masha}=10\text{ km}-2\text{ km}=8\text{ km}

Now let us find Masha's biking speed.

\text{Speed}=\frac{\text{Distance}}{\text{Time}}

\text{Masha's biking speed}=\frac{8\text{ km}}{2\text{ hour}}

\text{Masha's biking speed}=4\frac{\text{ km}}{\text{ hour}}

Therefore, Masha's biking speed is 4 km per hour.

4 0
3 years ago
Two containers designed to hold water are side by side, both in the shape of a
Tresset [83]

Answer:

  1413.7 ft^3

Step-by-step explanation:

The volume of a cylinder is given by ...

  V = πr^2·h

After emptying part of container A into container B, the empty space in container A will be exactly the volume of container B:

  V = π(5 ft)^2·(18 ft) ≈ 1413.7 ft^3

4 0
3 years ago
The volume of a refrigerator is x^3-3x^2-16x-12.It's the height x+2.What are the other two dimensions?
cluponka [151]

Answer:

the other two dimensions are (x + 1) and  (x - 6)

Step-by-step explanation:

Given;

Polynomial function as volume of refrigerator = x³ - 3x²- 16x - 12

factor of the function as height of the refrigerator, = x + 2

Divide the polynomial function by the given factor to get the remaining factors, which are the other two dimensions;

                           x²  - 5x - 6

                          --------------------------------------

            x + 2  √ x³ - 3x²- 16x - 12

                      -  (x³  + 2x²)

                         ------------------------------

                                 -5x² - 16x - 12

                              -  (-5x² - 10x)

                         -------------------------------

                                           -6x - 12

                                         - (-6x - 12)

                         --------------------------------------

                                                 0

Factorize the quotient ( x²  - 5x - 6);

x²  - 5x - 6 =   x²  + x  -6x - 6

                  =   x (x + 1) - 6( x + 1)

                  = (x + 1) (x - 6)

Thus, the other two dimensions are (x + 1) and  (x - 6)

5 0
3 years ago
2. GYMNASIUM You want to estimate the number of students in your school who think the gymnasium should be remodeled. You survey
umka21 [38]
Yes your going to get biased opinions and they would all say yes because they play basketball in the gym so obviously they want good things so they want it to be remodeled
6 0
2 years ago
Read 2 more answers
PLEASE HELP FOR 20 POINTS AND BRAINLIST! ;)
klio [65]

Answer:

12 different combinations.

Step-by-step explanation:

There are two different ways you can do it.  Using One of your balloons and counting from the three balloons. And do it until 3 are all used.  Which is 12. This may not help because I am having trouble explaining it. If you already understand or don't wanna, you can just do, 4 balloons multiplied by 3 ribbons.  And we get 12 again. I hope this helps!

5 0
3 years ago
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