Question

Pls solve the maths for me i will give bainliest. i need it due today.

Answer 1

Answer:  2.1     Solve   c2-u2-z2  = 0

In this type of equations, having more than one variable (unknown), you have to specify for which variable you want the equation solved.

We shall not handle this type of equations at this time

Step-by-step explanation:

Answer 2

Answer:

x = 41    ||      surface area = 8950 cm³

Step-by-step explanation:

1)

$c^{2}=u^{2}+z^{2}- \frac{6x}{y+4u}$

$-u^{2}-z^{2}+c^{2}=- \frac{6x}{y+4u}$

$+u^{2}+z^{2}-c^{2}=\frac{6x}{y+4u}$

$({y+4u})(+u^{2}+z^{2}-c^{2})={6x}$

$\frac{({y+4u})(+u^{2}+z^{2}-c^{2})}{6} =x$

$x =\frac{(10+4(-1))((-1)^{2}+7^{2}-(-3)^{2} ) }{6}$

$x=41$

2)

Formula of surface area of cuboid:

2(lh + lw+ hw) square units

2(60*25+60*35+25*35)

2(4475)

8950 cm³