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3 years ago

How do you subtract: a negative number minus a positive number?

1 answer:

3 0

Hello there!

When subtracting a positive number from a negative, you're doing the same as adding two positive numbers, but flipping the value.

For example;

-2 - 2 = -4
2 + 2 = 4

If this doesn't help you, please message me or comment below and I will do my best to explain to you how it works. Thanks!

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If R is the midpoint of QS, QR= 8x-51 and RS = 3x-6, find QS.

sashaice [31]

QS would be 42. So the way i did it was I:

8x-51=3x-6

x=9

Plugged into both equations of QR and RS to then get the answer of 42

7 0

3 years ago

Read 2 more answers

The difference between two numbers is 7. The sum of twice the larger number and three times the smaller number is 19.

Alex17521 [72]

Answer:

x= 8 y= 1

Step-by-step explanation:

First, you identify your variables:

x= larger number

y= smaller number

Second, you find your equations:

x - y = 7

2x + 3y = 19

Third, (I used the substitution method) you make "y" by itself for the 1st equation.

y = x - 7

2x + 3y = 19

Then, you plug in the 1st equation for "y" in the 2nd equation

2x + 3(x - 7) = 19

Then, you distribute and simplify.

2x + 3x - 21 = 19

5x - 21 = 19

5x = 40

x = 8

Finally, you plug in the variable you found ( x ) into one of the equations and solve,

8 - y = 7

- y = -1

y = 1

6 0

3 years ago

Solve 3x2 + 17x - 6 = 0.

geniusboy [140]

$3x^2 + 17x - 6 = 0\\
3x^2-x+18x-6=0\\
x(3x-1)+6(3x-1)=0\\
(x+6)(3x-1)=0\\
x=-6 \vee x=\dfrac{1}{3}$

7 0

3 years ago

Read 2 more answers

Use the drop-down menus to choose steps in order to correctly solve 4k−6=−2k−16−2 for k.

RoseWind [281]

From figure 1: -

From figure 2: 12

From figure 3: 6

From figure 4: -12

From figure 5: -2

Step-by-step explanation:

We need to solve the equation $4k-6=-2k-16-2$ for k.

Solving:

$4k-6=-2k-16-2\\4k-6=-2k-18\\4k=-2k-18+6\\4k=-2k-12\\4k+2k=-12\\6k=-12\\k=\frac{-12}{6}\\k=-2$

So, the options to be selected are:

From figure 1: -

From figure 2: 12

From figure 3: 6

From figure 4: -12

From figure 5: -2

Keywords: Solving equations

Learn more about Solving equations at:

#learnwithBrainly

7 0

3 years ago

How many solutions are there to the equation below?

Vikentia [17]

Answer:

$5x + 48 + 7x = 12(x + 4) \\ 5x + 48 + 7x = 12x + 48 \\ (5x + 7x) + 48 = 12x + 48 \\ 12x + 48 = 12x + 48 \\ 12x - 12x = 48 - 48 \\ 0 = 0$

There is no solution

4 0

2 years ago

Read 2 more answers