olguita82
05.02.2020 •
Mathematics
Identify the lateral area and the surface area of a right rectangular prism with an 8 cm by 9 cm base and a height of 13 cm.
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Ответ:
LA= 442cm^2
SA= 586cm^2
Step-by-step explanation:
Lateral Area= (2l+2w) h
LA= (2(8) + 2(9)) 13
LA= (16+18) 13
LA= (34)13
LA=442cm^2
Surface Area= 2 (wh + lh + lw)
SA= 2 (104+117+72)
SA= 2(293)
SA= 586cm^2
Ответ:
x = 2.777777778
Step-by-step explanation:
Simplifying
4 + -9x + 21 = 0
Reorder the terms:
4 + 21 + -9x = 0
Combine like terms: 4 + 21 = 25
25 + -9x = 0
Solving
25 + -9x = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-25' to each side of the equation.
25 + -25 + -9x = 0 + -25
Combine like terms: 25 + -25 = 0
0 + -9x = 0 + -25
-9x = 0 + -25
Combine like terms: 0 + -25 = -25
-9x = -25
Divide each side by '-9'.
x = 2.777777778
Simplifying
x = 2.777777778