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Blababa [14]
4 years ago
9

One number is 6 less than 3 times another number and their sum is 62.find the numbers

Mathematics
1 answer:
zysi [14]4 years ago
3 0

y = 6 - 3x

x + y = 62

Since we already know the value of y, we can use substitution to find the value of x.

x + 6 - 3x = 62

<em><u>Subtract 6 from both sides.</u></em>

x - 3x = 56

<em><u>Combine like terms.</u></em>

-2x = 56

<em><u>Divide both sides by -2</u></em>

x = -28

Now that we know the value of x, we can solve for the value of y.

x + y = 62

-28 + y = 62

<em><u>Add 28 to both sides</u></em>

y = 90

The value of y is 90, and the value of x is -28 (this is your answer)

To make sure that these values are correct, we can plug them into the original equations.

y = 6 - 3x

x + y = 62

90 = 6 - 3(-28)

90 = 90 √ this is correct

-28 + 90 = 62

62 = 62 √ this is also correct

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A blue parachute that falls 12 feet in 6 seconds
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4 years ago
I need help with this stuff and i need the answers step by step thank you!!
abruzzese [7]

Answer:

2. A

3. C

4. B

Step-by-step explanation:

2. To answer # 2, just add all the sides together...

(5x-7) + (3x-4) + (2x-6)

=  10x - 17

3. To answer # 3, divide/mulitply both the numerators and denominators by the same number and check to see if that answer matches the displayed answer...

a) 28 divided by 7 is 4,  so divide the whole fraction by 7 to see if the fraction is proportional...  

  28/7 = 4

  49/7 = 7

   \frac{4}{7} =\frac{4}{7}

b) 4 goes into 16  4 times so multiply \frac{4}{7} by 4...

   4 x 4 = 16

   7 x 4 = 28

   \frac{16}{28} =  \frac{16}{28}

c) 4 goes into 16 4 times so multiply the whole fraction by 4...

   4 x 4 = 16

   7 x 4 = 28

   \frac{16}{28} ≠ \frac{16}{35}

d) 4 goes into 20 5 times to multiply the whole fraction by 5...

   4 x 5 = 20

   7 x 5 = 35

   \frac{20}{35} = \frac{20}{35}

C is the answer because the fractions are not proportional.

4) 25% is a quarter of 100%. A third of 100% is 75%.

   $120 - 0.25($120) = $90

   Another expression for the for sale price is...

   B) 0.75($120) = $90

7 0
3 years ago
20. Find the area of the shape below.
Furkat [3]

Answer:

Step-by-step explanation:

5 0
3 years ago
Your teacher writes the fact below on the board.Using only mental math, will the answer be less than or greater than 5? How do y
Levart [38]

Answer:

Less than 5

Step-by-step explanation:

The eason behind the answer being less than 5 is because if you multiply something by a fraction that is less than a whole number, then you will get less than the original number you multiplied the fraction with.

Hope this helps :)

4 0
2 years ago
Consider the expansion of (a + b)^12. Determine the coefficients for the terms with the powers of a and b shown.
ratelena [41]

Answer:

The answer to your question is:

Step-by-step explanation:

                                             (a + b)¹²

a¹² + 12a¹¹b + 66a¹⁰b² + 220a⁹b³ + 495a⁸b⁴ + 792a⁷b⁵ + 924a⁶b⁶ + 792a⁵b⁷

+ 495a⁴b⁸ + 220a³b⁹ + 66a²b¹⁰ + 12ab¹¹ + b¹²

a. a²b¹⁰   = 66

b. a⁵b⁷   = 792

c. a⁸b⁴ = 495

4 0
3 years ago
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