Let Cody be x years old now. and y be Evan's age now.
x = 2y
x -7 + y - 7 = 10
x + y = 24
Substitute for x = 2y:-
2y + y = 24
y = 8
and therefore
x = 2*8 = 16
Answer is Cody is now 16 and Evan is 8
Answer:
x=8
Step-by-step explanation:
Solve the following system using elimination:
{7 x + 2 y = -19 | (equation 1)
{2 y - x = 21 | (equation 2)
Add 1/7 × (equation 1) to equation 2:
{7 x + 2 y = -19 | (equation 1)
{0 x+(16 y)/7 = 128/7 | (equation 2)
Multiply equation 2 by 7/16:
{7 x + 2 y = -19 | (equation 1)
{0 x+y = 8 | (equation 2)
Subtract 2 × (equation 2) from equation 1:
{7 x+0 y = -35 | (equation 1)
{0 x+y = 8 | (equation 2)
Divide equation 1 by 7:
{x+0 y = -5 | (equation 1)
{0 x+y = 8 | (equation 2)
Collect results:
Answer: {x = -5, y = 8
2/cos x
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Obtuse angle. If wrong I’m sorry lol
