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lara [203]
2 years ago
8

During training, an athlete ran 250 m/min. But then on race day, he increased his speed to 300 m/min and finished the race 1 min

ute faster than he had during training. What distance is the race?
Mathematics
1 answer:
Grace [21]2 years ago
4 0

Answer:

stop cheating for rsm

Step-by-step explanation:

pov: classroom2146 high school

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Solve for x and y.<br><br> 4x-3y=16<br> -2x+4y=-2<br><br> DUE 2/7/17!
Trava [24]
\left \{ {{4x-3y=16\:(I)} \atop {-2x+4y=-2\:(II)}} \right.

<span>Multiply the 2nd equation by (-4). This will eliminate the x's when you add the two new equations together.
</span>\left \{ {{4x-3y=16\:\:\:\:\:\:\:\:\:\:} \atop {-2x+4y=-2\:*(-4)}} \right.
\left \{ {{\diagup\!\!\!\!4x-3y=16} \atop {-\diagup\!\!\!\!4x+8y=-4}} \right.
--------------------
5y = 12
\boxed{\boxed{y =  \frac{12}{5}}}\end{array}}\qquad\quad\checkmark

Let's replace the value found in the first equation:
4x-3y=16\:(I)
4x-3*( \frac{12}{5}) =16
4x -  \frac{36}{5} = 16
least common multiple (5)
\frac{20x}{\diagup\!\!\!\!5} - \frac{36}{\diagup\!\!\!\!5} = \frac{80}{\diagup\!\!\!\!5}
20x - 36 = 80
20x = 80 + 36
20x = 116
x = \frac{116}{20} \frac{\div4}{\div4} \to\: \boxed{\boxed{x = \frac{29}{5} }}\end{array}}\qquad\quad\checkmark



4 0
4 years ago
Is 4.64 prime or composite
AlladinOne [14]

Answer:

Therefore all numbers that end with five and are greater than five are composite numbers. The prime numbers between 2 and 100 are 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89 and 97.

Step-by-step explanation:

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aliya0001 [1]

Answer:

I think is is 14 square inches.

Step-by-step explanation:

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-Dominant- [34]

Answer:

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Step-by-step explanation:

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Lapatulllka [165]

This equation is put in slope-intercept form.  That means it is in Y = mx+b.

m stands for the slope, and b stands for the y-intercept.  So, in this case -9 is the B value, so -9 is the y-intercept.


Ordered Pair: (0,-9)

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4 years ago
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