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plug30
10.06.2020 •
Mathematics
Where to Dig: The dinosaur's
tail bones are at the solution
point to the system of
equations below.
- 2x - 7y = -250
y = 140
Every time you click a point
using the CPS, the equations
below will update. Remember,
the solution is the point that
makes both equations true.
-2( x ) - 7(y) =250 X
4( x) - (y) =140 X
Solved
Show answers
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Ответ:
x = 41
y = 24
Step-by-step explanation:
Systems of equations is,
-2x - 7y = -250 ------(1)
4x - y = 140 ------(2)
Equation (1) multiplied by 2 then added to equation (2)
-4x -14y = -500
(+) 4x - y = 140
-15y = -360
y =![\frac{360}{15}](/tpl/images/0681/8529/e93ee.png)
y = 24
by putting y = 24 in equation (2),
4x - 24 = 140
4x = 140 + 24
x =![\frac{164}{4}](/tpl/images/0681/8529/c944a.png)
x = 41
For x = 41 and y = 24 both the equations are true.
Equation (1), -2(41) - 7(24) = -250 [True]
Equation (2), 4(41) - (24) = 140 [True]
Ответ: