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Elena-2011 [213]
3 years ago
14

7x+4=7x+-4 help pls

Mathematics
1 answer:
Lesechka [4]3 years ago
5 0

Answer:

-8

Step-by-step explanation:

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The equation of line WX is 2x + y = -5. What is the equation of a line perpendicular to line WX in slope-intercept form that con
sveticcg [70]

Answer:

The third choice is the one you want

Step-by-step explanation:

If we are to write the equation of a line perpendicular to WX, we first must determine what the slope of the WX is, because the line perpendicular to WX has a slope that is the flip of the slope of WX with the opposite sign.  Solving for y takes care of finding the slope of WX:

2x + y = -5 so

y = -2x - 5

The slope is -2.  That means that the reciprocal slope is 1/2.  Using that slope along with the coordinates x = -1 and y = -2, we first write the line using point-slope form and then solve it for y.  Start by filling in the m, the x value and the y value:

y - (-2) = \frac{1}{2}(x-(-1))

Getting rid of the double negatives gives us:

y+2=\frac{1}{2}(x+1)

Distributing then gives us:

y+2=\frac{1}{2}x+\frac{1}{2}

And finally solving for y (I am going to express the 2 on the left as 4/2 when I move it by subtraction in order to add those fractions):

y=\frac{1}{2}x+\frac{1}{2}-\frac{4}{2}

And the final equation in slope-intercept form is:

y=\frac{1}{2}x-\frac{3}{2}

8 0
3 years ago
An artist is making a mural by reproducing a painting at a different scale. The original painting is 10 1/2 inches long and 4 in
Tatiana [17]

Answer:

1 inch : 4 feet

Step-by-step explanation:

Size of the Mural is 42 feet long and 16 feet.

The original painting is 10½ inches long and 4 inches wide.

On the length

Length of Painting: Length of Mural

10½ inches: 42 feet

1 inch : 42/10½ feet

1 inch : 4 feet

On the Width

Width of Painting: Width of Mural

4 inch: 16 feet

1 inch : 16/4 feet

1 inch : 4 feet

The Scale of the Original Painting to the Mural is therefore:

1 inch : 4 feet

7 0
3 years ago
Read 2 more answers
suppose that an individual has a body fat percentage of 19.8% and weighs 162 pounds. How many pounds of his weight is made up of
Andrei [34K]

Answer:

32.1 pounds

Step-by-step explanation:

Given data

Percentage of body fat= 19.8%

Weight= 162pounds

Let us find 19.8% of the persons weight

=19.8/100*162

=0.198*162

=32.076

Therefore, 32.1 pounds of the weight is fat

3 0
3 years ago
Solve the proportion to determine the value of x. <br><br> 2x / 5 = x+3 / 3
ale4655 [162]
When you solve a proportion, your first step should be to cross-multiply.

\frac{2x}{5} = \frac{x + 3}{3}

When you cross-multiply, you should get this equation:

(2x)(3) = (x + 3)(5)

Now, solve it using algebra.

(2x)(3) = (x + 3)(5)       Multiply
       6x = 5x + 15         Subtract 5x from both sides
         x = 15

The value of x is 15.
4 0
4 years ago
What is 12 = -5x + 2
Ksivusya [100]

Answer:

Hi there!

Your answer is;

-2= x

Step-by-step explanation:

12= -5x +2

-2

10= -5x

/-5

-2 = x

Hope this helps

7 0
3 years ago
Read 2 more answers
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