Answer:
Step-by-step explanation:
x*y = 490
x + y = 49
x = 49 - y
y*(49 - y ) = 490
49y - y^2 = 490
0 = y^2 - 49y + 490
This does factor (oddly). It doesn't look like it, but it does.
(y - 35) (y - 14) = 0
y - 35 = 0
y = 35
y - 14 = 0
y = 14
x = 49 - y
Let y = 14
x = 49 - 14
x = 35
x = 49 - y
let y = 35
x = 49 - 35
y = 14
Solutions
(35,14)
(14,35) Both solutions are valid.
Answer:
B. Cube and E. hexahedron
Step-by-step explanation:
Icosahedron are made of triangles, cubes are made of squares, tetrahedron are made of triangles, octahedron are made of triangles, hexahedron are made of squares, dodecahedron are made of pentagons.
i hope it helps! Have a great day!
Sandra~
The answer is 18 bc if you do all the math thats the answer
Answer:
70
Step-by-step explanation:
180-45-65
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No, y does not vary directly with x. When y varies with x, it means that y and x always have the same ratio. Simplified, the first ratio is 1:5 and the second and third ratios simplified are 1:6. Therefore, y does not vary with x.