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Basile [38]
3 years ago
15

What is 3(k-6)=15? Please provide an explanation.

Mathematics
2 answers:
Gwar [14]3 years ago
8 0
First you would have use the distributive property to make this an easier problem.So take 3 times k (if the variable has no number just add a one) and 3 times -6 to get the problem of 3k-18=15. Now you would add 18 to -18 and get 0 and do it on the 15. 15+18=33,now you have 3k=33.now you divide 3/3 and get 1 and divide 33 by 3 to get 11.
Answer is k=11
Mkey [24]3 years ago
5 0
I might be able to give you a hand here!
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What is the best first step for solving the given system using substitution while avoiding fractions -9x+4y=10 -9x+3y=3
Sever21 [200]

Answer:

Solve for x in the first equation. ⇒ the first answer

Step-by-step explanation:

* Lets study how to solve the system of the equation using

 the substitution method

- The first equation is ax + by = c

- The second equation is dx + ey = f

* To chose the first step

- Solve for x or y depends on the integer answer

EX: ax = c - by ⇒ x = c/a - (b/a)y

      b/a = integer , c/a = integer ⇒ best choice

- If not solve for next variable

EX: by = c - ax ⇒ y = c/b - (a/b)y

      a/b = integer , c/b = integer ⇒ best choice

- If not repeat with the second equation to find the best choice

* Lets check our equations:

∵ -9x + 4y = 10 ⇒ (1)

∵ -9x + 3y = 3 ⇒ (2)

* If we start with the first equation and solve for x

∵ -9x = 10 - 4y ⇒ (2)

- It will be difficult if we divide by -9, but the second equation

 has -9x, so we will solve of -9x not for x and substitute the value

 of -9x in the second equation

* Substitute (3) in (2)

∴ 10 - 4y + 3y = 3 ⇒ collect the like terms

∴ -y = -7 ⇒ y = 7

substitute the value of in (3)

∴ -9x = 10 - 4(7) ⇒ -9x = -18 ⇒ ÷ -9 in both sides

∴ x = 3

∴ The best choice to avoid fraction is:

  Solve for x in the first equation.

7 0
3 years ago
Read 2 more answers
ANSWER ASAP!! A movie club charges $10 per month, plus $1.50 per rental. Diego spends no more than $25 per month on movies. Desc
Dafna11 [192]

Answer:

The graph has a closed circle at 10

Step-by-step explanation:

Let

x ----> the number of rentals

The phrase "no more" means "less than or equal to"

so

The inequality that represent this situation is

1.50x+10\leq 25

solve for x

1.50x\leq 25-10

1.50x\leq 10

x\leq 10

The number 10 is included in the solution

therefore

The graph has a closed circle at 10

8 0
3 years ago
Read 2 more answers
Sum of two digit number is9.When we interchange the digits it is found that the resulting new number becomes twice the other num
ruslelena [56]

Answer:

4 and 5

Step-by-step explanation:

Let the numbers be x and y

If their sum is 9, hence;

x + y = 9 ....1

When reversed

10y+x = 2(10x+y)

10y+x = 20x + 2y

10y - 2y = 20x - x

8y = 19x

y = 10x/8 ...2

Substitute equation 2 into 1;

From 1;

x+y = 9

x +(10x/8) = 9

18x/8 = 9

18x = 72

x = 72/18

x = 4

Since x+y =9

y = 9-x

y =9-4

y = 5

Hence the numbers are 4 and 5

8 0
3 years ago
Hellooo menejkfnfkdjdkdkdmmdmfjf
Vesna [10]
Helloo, i don’t see the image seen above, is that the only picture?
6 0
3 years ago
9.12cm<br> 10.36cm<br> 11.34cm<br> 12.61cm
Vinvika [58]
Tan80 = QR / RS
QR = 5.67 (2)
QR = 11.34

answer

<span>11.34cm</span>
8 0
3 years ago
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