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2 years ago

Prove step by step that 5^20-5^19 is an even number with out using a calculator Please can you tell me the steps and why?

Mathematics

1 answer:

hammer [34]2 years ago

8 0

9514 1404 393

Answer:

factor out 5^19

Step-by-step explanation:

a) Reason from parity:

both 5^20 and 5^19 are products with only odd numbers (5) as factors. Hence each is an odd number. The difference of odd numbers is always even.

b) Factor:

5^20 -5^19 = 5^19(5 -1) = 5^19×4

This product has an even factor (4), so is even.

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Alina [70]

Answer:

b = (c - 3a)/4

Step-by-step explanation:

3a + 4b = c

4b = c - 3a

b = (c - 3a)/4

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1 year ago

the number of members in a club dropped from 80 to 52. what is the percent of decrease in the number of members

Illusion [34]

Percent of decrease :
Original - New / Original
so...
80 - 52 / 80 ---->
28/80
.35 multiply by 100 to get percent
35% increase Hope I helped if you have any questions let me know! :)

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2 years ago

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2 years ago

I need help rn please

nirvana33 [79]

Hello!

$\large\boxed{\text{ slope = -3}}$

Use the slope formula to solve for the slope of the line (m):

$m = \frac{y^{2} -y^{1} }{x^{2} -x^{1} }$

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2 years ago

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RoseWind [281]

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