truesarah111
27.11.2019 •
Mathematics
Can someone me with this question?
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Ответ:
L^2=(x2-x1)^2+(y2-y1)^2
So if we first look at the two "bottom" points...we get:
b^2=(-1--3)^2+(-2--4)^2
b^2=2^2+2^2
b^2=4+4
b^2=8
b=√8
Now if we look at the two "left" point that make of a side we have:
s^2=(-3--6)^2+(-4--1)^2
s^2=3^2+(-3)^2
s^2=9+9
s^2=18
s=√18
So the area of this rectangle is bs so
A=√8√18
A=√144
A=12 u^2
Ответ:
Let x = chloe's age.
Let y = Leonel's age.
To help solve this, construct a system of equations.
x = 5 + y.
8y = 3x.
We can solve this by substitution. Substitute 5 + y for x in the second equation.
8y = 3(5 + y). Distribute the 3.
8y = 15 + 3y. Subtract 3y from both sides.
5y = 15. Divide each side by 5.
y = 3. Plug this into one of our original equations.
x = 5 + 3. Add your numbers together.
x = 8
Chloe is 8 years old