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3 years ago

13

Just a follow up to my previous question "There is a 20% off sale going on at your local electronic store. The price of an mp3 p

layer is 35.96$. What is the new price?" The answer is 44.95$. So how would you complete the question?

1 answer:

Vikki [24]3 years ago

4 0

The new price of the mp3 player is $44.95.

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Prove that 25^11−5^19 is divisible by 31.

SCORPION-xisa [38]

Answer:

Divisible by 3 is the answer

Step-by-step explanation:

First get everything to have the same base of 5

25^11 - 5^19

(5^2)^11 - 5^19

5^(2*11) - 5^19

5^22 - 5^19

Now factor out the GCF 5^19 to get

5^22 - 5^19

5^(19+3) - 5^(19+0)

5^19*5^3 - 5^19*5^0

5^19(5^3 - 5^0)

5^19(125 - 1)

5^19*(124)

At this point, we factor the 124 into 31*4 to end up with this full factorization: 5^19*31*4

Therefore, 25^11 - 5^19 is equivalent to 5^19*31*4

Since 31 is a factor of the original expression, this means the original expression is divisible by 31.

4 0

3 years ago

Mai biked 7 and 1/4 miles today, and Noah biked 3 5/8 miles. How many times the length of Noah's bike ride was Mai's bike ride?

Firdavs [7]

Answer:

2 times

Step-by-step explanation:

Mai biked $7\frac{1}{4} = \frac{29}{4}$ miles today and Noah biked $3\frac{5}{8} = \frac{29}{8}$ miles today.

We are asked how many times the length of Noah's bike ride was Mai's bike ride.

Therefore, the length of Mai's bike ride was $(\frac{29}{4} \div \frac{29}{8}) = 2$ times the length of Noah's bike ride.

Therefore, we will take option B will be correct. ( Answer )

7 0

3 years ago

If nx10^p is a positive number written in scientific notation which statements must be true? Select all that apply

liq [111]

For this case we have the following number written in scientific notation:

$n * 10 ^ p$

We know that this number is greater than zero because it is a positive number.

Therefore, the following statements are true:

p ∈ (-∞, ∞)

n must be between 1 and 10

n ∈ [1, 10]

Answer:

The following statements are correct about the number written in scientific notation:

p ∈ (-∞, ∞)

n ∈ [1, 10]

3 0

3 years ago

Helpp its for a test and I don’t know how to do it

lozanna [386]

X f(x)
1 -12
0 -9
-1 -6

5 0

3 years ago

47.9 less than k is -21.6

Law Incorporation [45]

K is equal to -69.5 K=69.5 You put it in an equation 47.9-K=-21.6Then you subtract 47.9 from both sides and you get K=69.5

3 0

4 years ago