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Vlada [557]
3 years ago
9

Martina runs 3 miles in 28 minutes. At the same rate, how many miles would she run in 42 minutes? miles

Mathematics
1 answer:
morpeh [17]3 years ago
5 0
3/28= miles/minute 

multiply this number by 42 to get 4.5

so she would go about 4.5 miles in 42 minutes 
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The triangle below is equilateral. Find the length of side xx in simplest radical form with a rational denominator.
mylen [45]

The length of side x in simplest radical form with a rational denominator is 8√3

<h3>How to find the length of side x in simplest radical form with a rational denominator?</h3>

The given parameters are:

Triangle type = Equilateral triangle

Height (h) = 12

Missing side length = x

The missing side length, x is calculated using the following sine ratio

sin(60) = Height/Missing side length

This gives

sin(60) = 12/x

Make x the subject of the formula

So, we have

x = 12/sin(60)

Evaluate the quotient

So, we have

x = 12/(√3/2)

This gives

x = 24/√3

Rationalize

x = 24/√3 * √3/√3

Evaluate

x = 8√3

Hence, the length of side x in simplest radical form with a rational denominator is 8√3

Read more about triangles at

brainly.com/question/2437195

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6 0
1 year ago
Can anyone help me with this math problem? Thank you.
pickupchik [31]

Step-by-step explanation:

Answer is in the picture.

4 0
3 years ago
Solve for x and y <br> x+y=a<br> x−y=b <br> PLZ HELP VERY URGENT
antoniya [11.8K]

Answer:

Step-by-step explanation:

x+y=a

a=x+y

x−y=b

b=x−y

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8 0
3 years ago
The graph of an absolute value function opens up and has a vertex of (0, -3).
Ad libitum [116K]
Absolute value function domain is all real numbers

absolute value has vertex of(0,-3)
and it opens up
means that the lowest y value is -3
highest is infinity


domain=-inifnity to infinity
range=-3 to positive initnify

the answer is C for the domain and B for the range
4 0
2 years ago
Read 2 more answers
How many gallons of a 80% antifreeze solution must be mixed with 80 gallons of 15% antifreeze to get a mixture that is 70% antif
konstantin123 [22]

440 gallons of 80 % antifreeze solution must be mixed with 80 gallons of 15% antifreeze to get a mixture that is 70% antifreeze

<em><u>Solution:</u></em>

Let "x" be the gallons of 80 % antifreeze added

Therefore, "x" gallons of 80 % antifreeze solution must be mixed with 80 gallons of 15% antifreeze

Final mixture is x + 80

Therefore, we can frame a equation as:

"x" gallons of 80 % antifreeze solution must be mixed with 80 gallons of 15% antifreeze to get (x + 80) gallons of 70 % antifreeze

Thus, we get,

x gallons of 80 % + 80 gallons of 15 % = (x + 80) gallons of 70 %

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Thus 440 gallons of 80 % antifreeze solution must be mixed

4 0
3 years ago
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