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Mathematics

2 answers:

tatyana61 [14]3 years ago

8 0

Answer:

Step-by-step explanation:

because it is

faust18 [17]3 years ago

8 0

Answer:

Step-by-step explanation:

A is incorrect because the range of the data is basically just subtraction. The range of 20-40 year old men's heart rates are higher than 50-70 year old men. B is incorrect. Think of "median" as "middle". The heart rates of the 20-40 year old men is higher than the heart rates of the 50-70 year old men. C is incorrect, because the minimum heart rate is the "starting point" of the box plot, in these cases for the 20-40 year old men, that would be 75, which is higher than the 50-70 year old men.

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8/9=4/5k how to solve

velikii [3]

Divide both sides by 4/5 or multiply by the reciprocal.

Flip 4/5 to get the reciprocal.
The reciprocal of 4/5 is 5/4 so we will multiply both sides by that.

5/4 * 8/9 = 4/5 * 5/4 * k

4/5 and 5/4 cancel out so now you have

5/4 * 8/9 = k

multiply top and bottom
(5 *8 )/(4*9)

40/36

Simplify

10/9

5 0

4 years ago

PLEASE HELP WITH EXPLANATION

Alja [10]

Answer:

There are 2 solutions to this equation

$x=-\frac{1}{4} +i\frac{\sqrt{19} }{4} ,x=-\frac{1}{4} -\frac{\sqrt{19} }{4}$

Step-by-step explanation:

for a quadratic equation of the form ax^2 + bx + c = 0 the solutions are

$x_{1,2}=\frac{-b±\sqrt{b^{2}-4ac } }{2a}$

$x=\frac{-2+\sqrt{2^{2}-4.4.5 } }{2.4} :-\frac{1}{4}+ i\frac{\sqrt{19} }{4} \\x=\frac{-2-\sqrt{2^{2}-4.4.5 } }{2.4} :-\frac{1}{4} -i\frac{\sqrt{19} }{4}$