Answer:
e
Step-by-step explanation:
i will give free points to people who answer my problem
Everyone should do this derivation, because otherwise the "quadratic formula" is some sort of "magic" LOL...
ax^2+bx+c=0
x^2+bx/a+c/a=0
x^2+bx/a=-c/a
x^2+bx/a+b^2x/(4a^2)=b^2/(4a^2)-c/a
(x+b/(2a))^2=(b^2-4ac)/(4a^2)
x+b/(2a)=±√(b^2-4ac)/(2a)
x=-b/(2a)±√(b^2-4ac)/(2a)
x=(-b±√b^2-4ac)/(2a)
You can set up an equation.
Let x = measure of the length.
Width: 2/3x
Length: x
From the question, we know that the perimeter is 70 and based on our prior knowledge, we know that for a rectangle, the perimeter is equal to 2 times the length added to two times the width.
2(2/3x + x) = 70
4/3x + 2x = 70
10/3x = 70
x = 21
So the length is 21 meters.
And since the width is 2/3 the length, 2/3 x 21 is 14.
So the width is 14 meters.
And if you add 21 + 21 + 14 + 14, it will equal 70 meters.
Now let's find the area.
21 x 14 = 294 square meters.
Answer:
One train weighs 30 tons and another train weighs 99 tons.
Step-by-step explanation:
30+99 adds up to 129
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<u><em>Answer:</em></u>She will be able to cut them into <u><em>12.5 pieces</em></u>
<u><em>Explanation:</em></u>We know that the total number of cakes is 5 cakes and that the portion of each piece would be </span>
<span>.
To know the total number of pieces she can divide, we would simply divide the total number of cakes by the portion of each cake as follows:
number of pieces = </span>
<span>
number of pieces = </span>
<span>
number of pieces = 12.5 pieces
Hope this helps :)
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