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meriva
3 years ago
14

Show that 8^3 − 1 is divisible by 7.

Mathematics
1 answer:
Brilliant_brown [7]3 years ago
7 0

Answer:

8•8=64•8=512-1=511÷7=73

Step-by-step explanation:

8 to the power of 3 is divisible by 7 because if the result is a real number, then you got it correct. We got a whole number here, so it was easier but if you get decimals, it takes more work. Well, there's your answer, hope it helped!!!

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< Last spring, Kai planted a total of 9 green peppers and tomatoes in the community garden.
ExtremeBDS [4]

Answer:

Step-by-step explanation:

Let x = the number of pepper plants, then (x + 6) = the number of tomato plants. Since the ratio of tomatoes to peppers is 5:2, we have the following:

5/2 = (x + 6)/x

2x + 12 = 5x

12 = 3x

4 = x = the number of pepper plants

3 0
3 years ago
Suppose a can of paint has a diameter of 14 cm and a height of 16 cm. what is the volume of paint in the can? (to nearest whole
RUDIKE [14]
We are given with two dimensions of a can of paint in which I assume is a  cylinder: 14 cm diameter and 16 cm height. In this case, the formula to be used is V = pi*d^2*h/4. substituting the given data above, V = pi*14^2*h/16 equal to 2462 cm^3. units must be consistent throughout to achieve the right answer.
4 0
3 years ago
Read 2 more answers
Bags of almonds cost three dollars more than bags of pecans the owner of a bakery ordered five bags of almonds and three bags of
antiseptic1488 [7]

Answer:

Let bags of pecans cost = x

Make an equation :

Bags of almonds cost = x + 3 (they said almonds cost 3 dollars more)

Total number of bags ordered: (3 bags pecans) + (5 bags of almonds)

Cost for pecans = 3x

Cost for almonds = 5(x + 3) = 5x + 15

Price of pecans + price of almonds = total cost

Solve for x:

3x + 5(x + 3) = 55 (remove brackets)

3x + 5x + 15 = 55 (add like terms)

8x + 15 = 55

8x + 15 - 15 = 55 - 15 (get rid of the 15)

8x = 40

8x/8 = 40/8

x = 5

bags pecans cost is $5

bags of almonds is $5+$3 = $8

6 0
3 years ago
Tate purchased a pair of slippers on the internet for a retail price of $16. After 6.5% sales tax, how much were the slippers?
anyanavicka [17]

Answer:

$15.02

Step-by-step explanation:

Given data

Total cost= $16

tax= 6.5%

let the actual cost of the slippers be x

6.5/100*x+ x= 16

0.065x+x= 16

1.065x= 16

divide both sides by 1.065

x= 16/1.065

x= 15.02

Hence the actual cost of the slippers is $15.02

7 0
2 years ago
Tell whether each sequence is arithmetic, geometric, or neither.
ANEK [815]
As an overview, an arithmetic series has a common difference (d) while a geometric series has a common ratio (r). Common difference is calculated by subtracting two consecutive numbers. Common ratio is calculates by dividing two consecutive numbers.

1.) Geometric series (r = 1/2)
2.) Neither
3.) d = 3
     19 - 16 = 3;  22 - 19 = 3;  25 - 22 = 3
4.) d = 2.8
     5.8 - 3 = 2.8;  8.6 - 5.8 = 2.8;  11.4 - 8.6 = 2.8
5.) r = 4
     24/6 = 4;  96/24 = 4;  384/96 = 4
6.) r = 4
     12/3 = 4
8 0
3 years ago
Read 2 more answers
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