MATHEMATICS HIGH SCHOOL

How many solutions does this equation have?
-7k-2=-9k+10

Answers

Answer 1
Answer:

Answer: k = 6

Step-by-step explanation: only one solution

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-28=7(x-7) What does x=

Answers

Answer:

-28=7(x-7)

First expand the terms on the right side

That is

-28 = 7x - 49

Group like terms

7x = -28 + 49

7x = 21

Divide both sides by 7

7x/7 = 21 /7

x = 3

Hope this helps

Answer:

so x=3

Step-by-step explanation:

-28=7(x-7)

opening the brackets by multiplying

-28=7x-49

adding 49 on both sides

-28+49=7x-49+49

21=7x

dividing 7 on both sides

21/7=7x/7

x=3

i hope this will help you :)

You owe some friends $25 and pay them back $18. Which number sentence shows this situation?25 + 18
-25 + 18
-18 + 25
-25 + (-18)

Answers

If you would like to know which number sentence shows the following situation, you can find this like this: 

$25 - $18 = $7

You still owe your friends $7.
The correct result would be 25 - 18 = - 18 + 25.

Answer:

-18 + 25

Step-by-step explanation:

Identify the solution set of the inequality, using the given replacement set.x < –4; {–10, –4.3, –4, –3.9, 2, 6.5}

A. {–10, –4.3, –4}
B. {–4, –3.9, 2}
C.{–10, –4.3}
D. {–3.9, 2}

Answers

Thank you for posting your question here at brainly. Feel free to ask more questions.   

The best and most correct answer among the choices provided by the question is C.{–10, –4.3} .    
      
Hope my answer would be a great help for you.  
Hello there.

Identify the solution set of the inequality, using the given replacement set.

x < –4; {–10, –4.3, –4, –3.9, 2, 6.5}

C.{–10, –4.3}

Please answer these rly simple but I'm confused still questions

Thanks!

Answers

just divide the miles they traveled by how long it took them

A screwdriver cost $99, if you save $79 what is the percent of change?

Answers

To calculate the percentage of change We:
⇒work out the difference of the two costs
                               $99-$79=$20
⇒Divide the difference by the original
                                (20)/(99)
⇒Multiply by 100 to get the answer as a percentage
                          (20)/(99) × 100
                           =20.2%
When we have a check:
$99 × 0.202 = 19.998 ≈ $20
                                        ║
                              The right answer

Determine the solution to the system of equations by using substitution. Y=4x+10
Y=-5x-10

Answers

Steps:
1. Substitute the y in 4x + 10 with -5x-10
-5x-10= 4x + 10
2. Add 5x on both sides
-10= 9x + 10
3. Subtract 10 on both sides
-20= 9x
4. Divide by 9 on both sides
5. Your answer is
X= -20/9
y=4x+10\ny=-5x-10\n\n4x+10=-5x-10\n9x=-20\nx=-(20)/(9)\n\ny=4\cdot(-(20)/(9))+10\ny=-(80)/(9)+(90)/(9)\ny=(10)/(9)\n
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