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anyanavicka [17]
4 years ago
6

What 21 over 4 equivalent to

Mathematics
2 answers:
Likurg_2 [28]4 years ago
5 0
 \frac{21}{4} = ? 

To find an equivalent fraction you multiply. 

<span> \frac{21}{4} x 2 = 

</span>⇒ 21 x 2 = 42 
⇒ 4 x 2 = 8

42/8 is equivalent to 21/4 

Law Incorporation [45]4 years ago
4 0
21/4 is equivalent to...

4 x 5 = 20
so, 21/4 = 5 1/4

5 1/4 = 5.25

5 1/4 = 5 2/8 = 42/8

42/8 = 84/16


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PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!
Kitty [74]

Answer:   (-2, 5) and (2, -3)

<u>Step-by-step explanation:</u>

Graph the line y = -2x + 1 (which is in y = mx + b format) by plotting the y-intercept (b = 1) on the y-axis and then using the slope (m = -2) to plot the second point by going down 2 and right 1 unit from the first point:

        y - intercept = (0, 1)            2nd point = ( -1, 1).

Graph the parabola y = x² - 2x - 3 by first plotting the vertex and then plotting the y-intercept (or some other point):

y = x^2-2x-3\quad \rightarrow \quad a=1,\ b=-2,\ c=-3\\\\\text{axis of symmetry:}\ x = \dfrac{-b}{2a}\ \longrightarrow \ x=\dfrac{-(-2)}{2(1)}=\dfrac{2}{2}=1\\\\\text{y-value of vertex:}\ f(1) = (1)^2-2(1)-3\quad \longrightarrow \quad y = 1 - 2 - 3=-4\\\\\text{y-intercept:}\ f(0)= (0)^2-2(0)-3\ \longrightarrow \ y=0 - 0 - 3 = -3 \\

         vertex = (1, -4)                2nd point (y-intercept) = (0, -3)


<em>see attached</em> - the graphs intersect at two points:  (-2, 5) and (2, -3)


8 0
3 years ago
The heights of adult men in america are normally distributed, with a mean of 69.1 inches and standard deviation of 2.65 inches.
Nesterboy [21]
The solution for this problem is:It's given that the heights are normally distributed. 
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5 0
3 years ago
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Murrr4er [49]

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4 0
3 years ago
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Oliga [24]

answer: $1,440

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8 0
3 years ago
What is the value of the expression 3y−z/y+5z when y = 6 and z = 2?
mixer [17]

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3 years ago
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