MATHEMATICS MIDDLE SCHOOL

Eight times a number increased by 9 is the same as 15 more than 7 times the number. Find the number. ​

Answers

Answer 1
Answer:

Haven translated the word problem into an algebraic expression, the unknown number is 6.

  • Let the number be n.

In this exercise, you're required to find an unknown number by writing an algebraic expression for the word problem and solve for the unknown number.

Translating the word problem into an algebraic expression, we have;

Eight times a number increased by 9:

8n + 9 ....equation 1.

15 more than 7 times the number:

7n + 15  ....equation 2.

Next, we would equate the two equations since we were told that they are the same.

8n + 9 = 7n + 15\n\n8n - 7n = 15 - 9\n\nn = 6

Therefore, the unknown number is 6.

Find more information: brainly.com/question/596290
Answer 2
Answer:

Answer:

the number is 6

Step-by-step explanation:

8x+9=15+7x

8x-7x+9=15+7x-7x

x+9=15

x+9-9=15-9

x=6

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You have 59 total coins for a total of 12..05. You only have quarters and dimes. How many of each coin do you have?

Answers

41 quarters and 18 dimes.

Quarters: 41

Dimes:  18

)Add.

Express your answer in simplest form.

3 3/4+2 1/2

Answers

:D The answer is, 6 1/4. :D
D is the answer  






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What is 2 3/4 minus 1 5/16?

Answers

Hey there, 2 3/4=11/4 and 1 5/16=21/16, 11*16-21*4/4*16=176-84/64=92/64, 92/64 simplified is 23/16, 23/16 as a mixed number is 1 7/16. Therefore, 2 3/4 minus 1 5/16 = 1 7/16
2 3/4= 11/4 which can be multiplied by 4 to be 44/16. 44-22 equals 22, therefore the answer is 22/16, which can be simplified to 11/8 or 1 3/8.

If the cost to the store is $5.50, and they mark it up 75%, what is the selling price?

Answers

Selling price-9.625

5.50*.75=4.125

5.50+4.125=9.625

-D@rkSh@dow
The selling price would be 9.625
5.50x75%=4.125
4.125+5.50=9.625

When x = 3 and y = 5, by how much does the value of 3x^2 – 2y exceed the value of 2x^2 – 3y ?F. 4
G. 14
H. 16
J. 20
K. 50

Answers

3\cdot3^2-2\cdot5-(2\cdot3^2-3\cdot5)=27-10-(18-15)=17-3=14

Mode for
86.4
87.2,95.7,96.4,88.1,94.9,98.5,94.8

Answers

mode is the most frequent number in a data set.  there would be NO mode here because none of the numbers here repeat. Are you sure you typed the numbers in the question correct? I understand if you typed something wrong. There are always typos bound to be somewhere! :)
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