Answer:
x = 64
Step-by-step explanation:
2/x = 1/32
cross multiply
2 × 32 = x × 1
64 = 1x
64 = x
Answer: 3x+5y
Coz we need to add and they are variables
The first expression, 12C3, is the right answer. There is no limitation saying that the team must be made up of one student from each year level. Furthermore, no distinction has been made among the three players (no assignments of Boards 1, 2, or 3), as the question just asks how many different groups. Since order does not matter, this is a combination. (If order mattered, this would be a permutation).
15 + .65x = 80
15 + .65x = 80
15 - 15 + .65x = 80 - 15
.65/.65x = 65/.65
x = 100
Beth swam 100 laps.
Answer:
Step-by-step explanation:
x-3y-z=-9;-2x+y+2z=3;2x+y+3z=8
Solution :
{x,y,z} = {1,3,1}
System of Linear Equations entered :
[1] x - 3y - z = -9
[2] -2x + y + 2z = 3
[3] 2x + y + 3z = 8
Solve by Substitution :
// Solve equation [3] for the variable y
[3] y = -2x - 3z + 8
// Plug this in for variable y in equation [1]
[1] x - 3•(-2x-3z+8) - z = -9
[1] 7x + 8z = 15
// Plug this in for variable y in equation [2]
[2] -2x + (-2x-3z+8) + 2z = 3
[2] -4x - z = -5
// Solve equation [2] for the variable z
[2] z = -4x + 5
// Plug this in for variable z in equation [1]
[1] 7x + 8•(-4x+5) = 15
[1] -25x = -25
// Solve equation [1] for the variable x
[1] 25x = 25
[1] x = 1
// By now we know this much :
x = 1
y = -2x-3z+8
z = -4x+5
// Use the x value to solve for z
z = -4(1)+5 = 1
// Use the x and z values to solve for y
y = -2(1)-3(1)+8 = 3
Solution :
{x,y,z} = {1,3,1}