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aleksley [76]
3 years ago
5

What is another way to check my answer for the problem 0.25 x 7

Mathematics
2 answers:
timama [110]3 years ago
6 0
Yhu can divide it......
Zanzabum3 years ago
4 0

Answer:

you can divide the problem

You might be interested in
What is the approximate perimeter of the parallelogram with vertices at 2, 4. 4, 1. -2, -2, and -4, 1
Gennadij [26K]

Answer:

The approximate perimeter of the parallelogram is 20.63 units

<em>(or 21 units if rounded up completely)</em>

Step-by-step explanation:

In principle we know that the Perimeter of a Parallelogram is given by:

\Pi=2(w+l)       Eqn. (1)

<em>where \Pi is the Perimeter, w is the width and l is the length of the parallelogram. We also know that since we have a Parallelogram rectangle it means that the two widths will be of equal size and the two lengths will also be of equal size. </em>

Now lets call each point as:

A(2,4)\\B(4,1)\\C(-2,-2)\\D(-4,1)     Eqn. (2)

then we have a Parallelogram ABCD where AB and CD can be our widths and BD and DA can be the lengths (or vice versa).

Since we know the vertices, we can compute each side of the parallelogram (i.e. AB, BC, CD and DA) using the distance formula that in principle reads:

|d|=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}        Eqn. (3)

Thus using the values from Eqn. (2) and the formula of Eqn. (3) for each side we have:

|AB|=\sqrt{(1-4)^2+(4-2)^2}=\sqrt{13}\\\\|BC|=\sqrt{(-2-1)^2+(-2-4)^2}=3\sqrt{5}\\\\|CD|=\sqrt{(1-(-2))^2+(-4-(-2))^2} =\sqrt{13}\\\\|DA|=\sqrt{(1-4)^2+(-4-2)^2} =3\sqrt{5}

Which proves that since |AB|=|CD| and |BC|=|DA| our calculations are correct and ABCD is in fact a parallelogram. So now we have all sides, and recalling Eqn. (1) and plugging in our values (where we can say  w=|AB|=|CD| and l=|BC|=|DA| we have:

\Pi=2(\sqrt{13}+3\sqrt{5})\\\Pi=20.627 units

<em>which can be rounded up as ≅20.63 units or  ≅21.  </em>

6 0
4 years ago
Eric randomly surveyed 150 adults from a certain city and asked which team in a contest they were rooting​ for, either North Hig
Rainbow [258]

Answer:

Proportion = 0.6 or 60 %

Step-by-step explanation:

Given:

- The obtained 95% confidence interval of a sample of adults rooting for North High:

                                         (0.52 , 0.68)

- Sample size n = 150

Find:

What proportion of the 150 adults in the survey said they were rooting for North High​ School?

Solution:

The proportion of adults rooting for North high corresponds to the mean value of interval, as follows:

                             Proportion = ( 0.52 + 0.68 ) / 2

                            Proportion = 0.6 or 60 %

7 0
3 years ago
Which set of measurements could represent the three sides of a triangle?
yawa3891 [41]

Answer:

The side lengths of a right triangle is 11cm, 60cm and 61cm, that could be selected from the given measurements.

Step-by-step explanation:

The measurements are,

                  7cm, 11cm, 54cm, 60cm, 61cm, 65cm

Step:1

                 To check the right angle triangle, Pythagorean theorem can be used.

                For a Pythagorean theorem,

                                     ..........................(1)

               The side values are lower than the hypotenuse,

                                                        ...................................(2)

               Where,

                         a,b - side values

                            c - Hypotenuse

               For right angle triangle,  c > a, b

               Alternative : 1

               Take, a = 7cm, b = 11cm

               From eqn (2),

                                                   =  = 13.04

              The above value is not equal to the any one of the values of ( 54cm. 60cm, 61cm, 65cm ), So its not an sides of right triangle.

               Alternative : 2

               Take, a = 7cm, b = 54cm

               From eqn (2),

                                                   =  = 54.45

              The above value is not equal to the any one of the values of (60cm, 61cm, 65cm ), So its not an sides of right triangle.

               Alternative : 3

               Take, a = 7cm, b = 60cm

               From eqn (2),

                                                   =  = 60.406

              The above value is not equal to the any one of the values of (61cm, 65cm ), So its not an sides of right triangle.

               Alternative : 4

               Take, a = 7cm, b = 61cm

               From eqn (2),

                                                   =  = 61.40

              The above value is not equal to the values of (65cm ), So its not an sides of right triangle.

                 Alternative : 5

               Take, a = 11cm, b = 54cm

               From eqn (2),

                                                   =  = 55.1089

              The above value is not equal to the any one of the values of (60cm, 61cm, 65cm ), So its not an sides of right triangle.      

                Alternative : 6

               Take, a = 11cm, b = 60cm

               From eqn (2),

                                                  =  = 61

              The above value is equal to the values of (61cm ), So its an sides of right triangle. The three sides are 11, 60 and 61.

Step:2

            Check for solution,

                                     

                                           

Result:

            The side lengths of a right triangle is 11cm, 60cm and 61cm, that could be selected from the given measurements.                

Step-by-step explanation: The side lengths of a right triangle is 11cm, 60cm and 61cm.

4 0
4 years ago
Write each improper fraction as a mixed number, in simplest form
erik [133]
  7/2 = 3 1/2
16/4 = 4
17/3 = 5 2/3
18/2 = 9
22/8 = 2 3/4
21/9 = 2 1/3
4 0
3 years ago
Read 2 more answers
Which expression is equivalent to (3−2²)+5? 5−3²
maw [93]

Answer:

your answer is attached

8 0
3 years ago
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