64x³+343y³
= (4x)³ + (7y)³
= (4x+7y)[(4x)^2+(7y)^2-(4x)(7y)]
= (4x+7y)(16x^2+49y^2-28xy)
Answer: (4x+7y)(16x^2+49y^2-28xy)
Hence, The value of x in the congruent triangles abc and dec is 1
<h2>What is geometry?</h2>
the branch of mathematics concerned with the properties and relations of points, lines, surfaces, solids, and higher dimensional analogs.
<h3>How to solve?</h3>
The question implies that the triangles abc and dec are congruent triangles.
The congruent sides are,
ab = de
bc = ce = 4
ac = cd = 5
The congruent side ab = de implies that,
4x - 1 = x + 2
Collect like terms,
4x - x = 2 + 1
Evaluate the like terms,
3x = 3
Divide through by 3
x = 1
Hence, the value of x is 1
learn more about congruent triangles: brainly.com/question/12413243
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Answer:
D
Step-by-step explanation:
(2*6)^4=20736
2^4*6^4 is the same as the expression which is equal to 20736
45/5=9
2x9=18
The answer is 18 seconds.