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Natasha_Volkova [10]
3 years ago
5

Calvin evaluated Negative two-thirds times 5 and one-sixth using the steps below.

Mathematics
1 answer:
Studentka2010 [4]3 years ago
4 0

Answer:

Step-by-step explanation:

-2/3 * 5 1/6 .....step 1.....correct

(-2/3 * 5) + (-2/3 * 1/6).....his error is here...it should be like I have written it, but Calvin is getting his addition and multiplication mixed up

-10/3 + (-1/9) =

-30/9 - 1/9 =

-31/9 =

- 3 4/9

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A man can walk from A to B and back in a certain time at 7 km/hr.If he walks from A to B at 8 km/hr and returns from B to A at 6
DerKrebs [107]
We calculate the speed by dividing the distance over time:
s = d/t
So the distance described in the problem is always the same, A to B and B to A.
But we are told that;
7 = d/t
7 = 2d/(t + 2)
that is, the first equation say that at speed 7 km/h a distance d is walked in a time t
the second equation say that at a average speed of 7 (that is 8 on one way and 6 in the other: 8 + 6 = 14, half of it), twice the distance is walked in a time equal to the first time plus 2 minutes.
So we have a system of linear equations, 2 of them with two unknowns, we can solve that:
7 = d/t
7 = 2d/(t + 2<span>)
</span>lets simplify them:
7t = d
7(t + 2) = 2d
7t = 2d - 14
we substitute the first in the second:
<span>7t = 2d - 14
</span><span>7t = d
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d = 2d - 14
d = 14
so the distance between A and B is 14 km
4 0
4 years ago
What is the percent increase of 10 to 24?
Aleks [24]
Let me explain it like this. add an extra 0 after 10 and you have 100 so every time you add 10 to the original number you are adding 100% so your answer would be 140%
6 0
4 years ago
Read 2 more answers
Please help me!! Thank you!
Drupady [299]
J i think it is I’m not sure
4 0
3 years ago
Write a linear equation in Slope-Intercept Form for a line that goes through the
Kitty [74]

Answer:

y = -2x -9

Step-by-step explanation:

<h2><u>in order to solve this question you have to do the following : </u></h2>

           1. find the midpoint of the coordinates given

           2. find the gradient of the line

            3. make the equation

<h3><em><u>STEP : The midpoint </u></em></h3>

formula of the midpoint is

\frac{x2 + x1}{2} , \frac{y2 + y1}{2}

now place the values in the equation :

\frac{-4 +-2}{2} , \frac{-5 + -1 }{2}

midpoint = ( -3 , -3)

<h3><em><u>STEP 2 : The gradient </u></em></h3>

formula of finding the gradient

\frac{y2-y1}{x2-x1}

insert the values in the equation:

\frac{-5-(-1)}{-2-(-4)}

=\frac{-4}{2}  = -2

gradient = -2

<h3><em><u>STEP 3: Form the equation </u></em></h3>

use the formula of the equation :

(Y - y1) = m( X - x1)

now make use of the gradient(m) and the midpoints and insert into the equation

(y-(-3)) = -2(x -(-3))

hence

y+3 = -2 (x +3)

y= -2x -6 -3

<h3><u /></h3><h3><u>y = -2x -9 </u></h3>

5 0
3 years ago
True or false? -4 is a natural number.
Vika [28.1K]
No, -4 is not a natural number. It is a negative, the only natural numbers are positiv numbers. Hope this helped!
4 0
4 years ago
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