A building is 1450ft tall. How many meters tall is the building ? Use the fact that 1m = 3.28ft
1 answer:
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<h2>Hello!</h2>
The answer is:
It takes Ella 3 seconds to do a push-up and 3 seconds to do a sit up.
<h2>Why?</h2>To find how many seconds Ella took to do a push-up and a sit-up we must write two equations using the given information.
Let be "x" the time needed to push-ups and "y" be the time needed to do sit-ups.
So, writing the equations we have:
First equation,
If she can do 13 push-ups and 7 sit-ups in 60 seconds, we have:
Second equation,
If she can do 13 push-ups and 19 sit-ups in 96 seconds, we have:
Now, creating a system of equations, and using the reduction method to solve it, we have:
Multiplying the first equation by -1, we have:
Then, substituting "y" into the first equation, we have:
Hence, we have that It takes Ella 3 seconds to do a push-up and 3 seconds to do a sit up.
Have a nice day!
<span>Trapezoid area = ((sum of the bases) ÷ 2) • height
</span>
<span>Trapezoid area = ((5 + 3) / 2) * 5
</span>
Trapezoid area = ((8) / 2) *5
<span>Trapezoid area = 20
Source:
http://www.1728.org/quadtrap.htm
</span>
</span>
<span>Trapezoid area = ((5 + 3) / 2) * 5
</span>
Trapezoid area = ((8) / 2) *5
<span>Trapezoid area = 20
Source:
http://www.1728.org/quadtrap.htm
</span>