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storchak [24]
3 years ago
13

-6 - (-7) The answer is not -13 Or -1 Or 13 I’m not sure how to do it :(

Mathematics
2 answers:
djverab [1.8K]3 years ago
6 0

Anytime you have an even number of minus signs, the equivalent is a plus sign. This is equivalent to

... -6 +7 = +1

_____

If you want to play around with the number line, you can find -6 at 6 units to the left of zero. Likewise, -7 is 7 units to the left of zero.

Whenever you add numbers on the number line, you go in the direction they are from zero. Both 1 and 2 are to the right of zero, so when you add 1 and 2 you go 1 unit right, then another 2 units right.

If you were to add 1 and -2, you start by realizing that -2 is to the left of zero. So you go 1 unit to the right (add 1), then 2 units to the left (add -2). The result is -1.

____

When you subtract a number on the number line, you go the direction opposite that number is from zero. (Essentially, you add its opposite.) In your problem, you have numbers -6 and -7, both to the left of zero. When you start from -6 and <em>subtract</em> -7, you go 7 units to the right, since that is the opposite direction that -7 is from zero.

Staring at -6 and going 7 units right, you end at +1.

When subtraction is written as adding the opposite, your problem is written

... -6 + (+7) = -6 +7 = +1

murzikaleks [220]3 years ago
3 0

its 1, if its not, your school's thing sucks and needs to be reprogramed

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lukranit [14]

Step-by-step explanation:

20x = 4x +16

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3 years ago
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Hey you ‼️ yeah I unfortunately need your help again these are hard:(
Helga [31]

Answer:

Step-by-step explanation:

The point of this question is to find out the point where two lines intersect. First we need to get the equation of those lines

Slope of line 1:

(Yb -Ya)/(Xb - Xa) =

(-10 - (-14))/(-1 - (-3)) =

4/2 =

2

Use that slope to find the Y-intercept of line 1

y = 2x + b

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-14 = -6 + b

-8 = b

Therefore Line 1 is:

y = 2x - 8

Slope of line 2

(11 - 13)/(-1 - (-3)) =

-2/2 =

-1

Y-intercept of line 2

y = -x + b

13 = -(-3) +b

13 = 3 + b

10 = b

Therefore line 2 is

y = -x + 10

Now we have 2 equations to solve for the coordinates x and y

y = 2x - 8

y = -x + 10

Substitute y out in one of the equations

2x - 8 = -x + 10

3x = 18

x = 6

Plug x into one of the equations

y = 2(6) - 8

y = 12 - 8

y = 4

Therefore the solution is:

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8 0
3 years ago
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Answer:

(a)Therefore the value of x=\pi

(b) Therefore the value of x =\frac{\pi}{2}

Step-by-step explanation:

Horizontal tangent line: The first order derivative of a function gives the slope of the tangent of the function. The slope of horizontal line is zero.If the slope of tangent line is zero then the tangent line is called horizontal tangent line.

(a)

Given function is,

f(x)= 3x+3sin x

Differential with respect to x

f'(x)=3+3cos x

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(b)

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⇒x = 90° =\frac{\pi}{2}

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