Answer:
x = 4
, y = 6
Step-by-step explanation:
Solve the following system:
{x + 3 y = 22 | (equation 1)
2 x - y = 2 | (equation 2)
Swap equation 1 with equation 2:
{2 x - y = 2 | (equation 1)
x + 3 y = 22 | (equation 2)
Subtract 1/2 × (equation 1) from equation 2:
{2 x - y = 2 | (equation 1)
0 x+(7 y)/2 = 21 | (equation 2)
Multiply equation 2 by 2/7:
{2 x - y = 2 | (equation 1)
0 x+y = 6 | (equation 2)
Add equation 2 to equation 1:
{2 x+0 y = 8 | (equation 1)
0 x+y = 6 | (equation 2)
Divide equation 1 by 2:
{x+0 y = 4 | (equation 1)
0 x+y = 6 | (equation 2)
Collect results:
Answer: {x = 4
, y = 6
9514 1404 393
Answer:
4x +3/2y
Step-by-step explanation:
The perimeter is twice the sum of length and width. We can use this to find the width.
P = 2(L+W)
15x +17y = 2(7/2x +7y +W)
15x +17y = 7x +14y +2W . . . . . . eliminate parentheses
8x +3y = 2W . . . . . . . . . . . . . . . subtract 7x +14y
W = 4x +3/2y . . . . . . . divide by 2
The width of the rectangle is 4x +3/2y.
Answer:
sin C = 7/25
cos C = 24/25
tan C = 7/24
Step-by-step explanation:
opposite of C = 7
adjacent of C = 24
hypotenuse of C = 25
sin = opposite / hypotenuse
so sin C = 7/25
cos C = adjacent / hypotenuse
so cos C = 24/25
tan = opposite / adjacent
so tan C = 7/24
Answer:
8 ≤ c or backwards c ≥ 8
Step-by-step explanation:
subtract one from 9?
12/80=3/20
Hope it helped
(Im in seventh grade too!)
