68.7 - t is your expression.
We need to find out the difference between their heights.
Difference means we subtract.
Since she is taller, we are subtracting her height by t. So the answer is 68.7 - t
Answer:
x ∈ {-a, -b}
Step-by-step explanation:
1/(a+b+x) = 1/a +1/b +1/x . . . . given
abx = bx(a+b+x) +ax(a+b+x) +ab(a+b+x) . . . . multiply by abx(a+b+x)
(a+b)x^2 +(a+b)^2x +ab(a+b) = 0 . . . . . subtract abx
x^2 + (a+b)x +ab = 0 . . . . . divide by (a+b)
This is a quadratic equation in x. It will have two solutions, as given by the quadratic formula.
x = (-(a+b) ±√((a+b)^2 -4(1)(ab))/(2(1)) = (-(a+b) ± |a -b|)/2
Without loss of generality, we can assume a ≥ b, so |a -b| ≥ 0. Then ...
x = (-a -b -a +b)/2 = -a
x = (-a -b +a -b)/2 = -b
There are two solutions: x ∈ {-a, -b}.
Answer:
approximately 8.16 times
Step-by-step explanation:
Answer:
The width of the rectangle is 2.5 feet
Step-by-step explanation:
Here, we want to calculate the width of the rectangle given its length
Let the area = perimeter = x
Mathematically;
area of rectangle = L * B = 10B
The perimeter of the rectangle = 2(L + B)
Also;
x = 10B
Let’s equate this to the perimeter
x = 10B = 2(L + B)
10B = 2(10 + B)
10B = 20 + 2B
10B -2B = 20
8B = 20
B = 20/8
B = 5/2
B = 2.5
The weight of each one of the five little girls if taken separately is 242.4 lb.
<h3>
Weight of each girl when taken separately</h3>
The weight of each girl can be determined from the average weight of the girls.
Weight of each girl = (Total weight) / number of girls
W = (129 + 125 + 124 + 123 + 122 + 121 + 120 + 118 + 116 + 114)/5
W = 1,212/5
W = 242.4 lb
Thus, the weight of each one of the five little girls if taken separately is 242.4.
Learn more about weight here: brainly.com/question/2337612
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