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Ulleksa [173]
3 years ago
15

!!10 points!! If ABC - DEF, what is the scale factor of ABC to DEF? Sorry this is my 4th or 5th post on math xD

Mathematics
1 answer:
Tema [17]3 years ago
7 0

Answer:

D

21/7 is basically 1/3 so it would be C

Step-by-step explanation:

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What is a = 1/2 (b-c) if b is the subject
natulia [17]

Answer:

b = 2a + c

Step-by-step explanation:

Given

a = \frac{1}{2} (b - c)

Multiply both sides by 2 to clear the fraction

2a = b - c ( add c to both sides )

2a + c = b

5 0
3 years ago
PLEASE HELP 70 POINTS
AlexFokin [52]

Answer:

-1 = -5

0 = -1

2 =  5

Step-by-step explanation:

In order to do this you need to follow these five (5) steps:

1) Know what each of the variables mean in an equation of a line. The equation of a line is y = mx + b where y = y-coordinate, m = slope, x = x-coordinate, and b = y-intercept. (Remember that the slope is the steepness  of a line and the y-intercept is the point where the line intersects  the y-axis. The x- and y-coordinates are values of the points on the line of y = 3x - 1.)

2) Identify the m (slope) and the b (y-intercept). The slope is 3, which can also be written as 3/1. The y-intercept is -1. (Remember that subtraction of 1 is the SAME thing as adding -1!) Since the y-intercept is a point it will be plotted at (0, -1).

3) Plot the y-intercept first. Start at the origin (intersection of the x- and y-axes) since the x coordinate is 0. Then move DOWN 1 unit since the y-coordinate is negative.

4) Use the m (slope) to plot at least three new points. The slope can also be represented as "rise/run" or the amount of units that you move UP or DOWN (vertically), then LEFT or RIGHT (horizontally). (Remember: if the numerator is positive (move UP); numerator is negative (move DOWN); denominator is POSITIVE (move RIGHT); denominator is NEGATIVE (move LEFT)). Since our slope is 3/1, and both the numerator and denominator are POSITIVE, that means we will be "rising" (moving UP) 3 units and "running" (moving RIGHT) 1 unit.

Start at the y-intercept  of (0, -1) and move up 3 units and to the right 1 unit. You should be at (1, 2). Plot a point here. Then do it again. You should now be at (2, 5). Plot another point. Now, do it one more time. You should now be at (3, 8). Plot your last point. (If you wish to continue plotting additional points, feel free to do so.)

4 0
3 years ago
Read 2 more answers
The width of a rectangle is the length minus 7 units. The area of the
AleksandrR [38]

Answer:

8 units

Step-by-step explanation:

<em>here's</em><em> your</em><em> solution</em>

<em>=</em><em>></em><em> </em><em>let </em><em>the </em><em>length</em><em> of</em><em> </em><em>rectangle</em><em> </em><em>be </em><em>X </em>

<em>=</em><em>></em><em> </em><em>then </em><em>width</em><em> </em><em>=</em><em> </em><em>x </em><em>-</em><em> </em><em>7</em>

<em>=</em><em>></em><em> </em><em>area </em><em>=</em><em> </em><em>8</em><em>u</em><em>n</em><em>i</em><em>t</em><em>s</em>

<em>=</em><em>></em><em>></em><em> </em><em>area </em><em>=</em><em> </em><em>length</em><em>*</em><em>width</em>

<em>=</em><em>></em><em> </em><em> </em><em>area</em><em> </em><em>=</em><em> </em><em>x </em><em>(</em><em>x-7)</em><em> </em><em>=</em><em> </em><em>8</em>

<em>=</em><em>></em><em> </em><em>x^</em><em>2</em><em> </em><em>-</em><em> </em><em>7</em><em> </em><em>=</em><em> </em><em>8</em>

<em>=</em><em>></em><em> </em><em>now,</em><em> </em><em>x^</em><em>2</em><em> </em><em>-</em><em> </em><em>7</em><em>x</em><em> </em><em>-</em><em> </em><em>8</em><em> </em><em>=</em><em> </em><em>0</em>

<em>=</em><em>></em><em> </em><em>factories</em><em> </em><em>the </em><em>above </em><em>equation </em><em>by </em><em>middle</em><em> term</em><em> split</em>

<em>=</em><em>></em><em> </em><em>x^</em><em>2</em><em> </em><em>-</em><em> </em><em>7</em><em>x</em><em> </em><em>-</em><em> </em><em>8</em>

<em>=</em><em>></em><em> </em><em> </em><em>x^</em><em>2</em><em> </em><em>-</em><em> </em><em>8</em><em>x</em><em> </em><em>+</em><em> </em><em>x </em><em>-</em><em> </em><em>8</em><em> </em>

<em>=</em><em>></em><em> </em><em>take </em><em>the </em><em>common</em>

<em>=</em><em>></em><em> </em><em>x(</em><em>x </em><em>-</em><em> </em><em>8</em><em>)</em><em> </em><em>+</em><em> </em><em>1</em><em>(</em><em>x </em><em>-</em><em> </em><em>8</em><em>)</em>

<em>=</em><em>></em><em> </em><em>(</em><em>x </em><em>+</em><em> </em><em>1</em><em>)</em><em> </em><em> </em><em>(</em><em>x </em><em>-</em><em> </em><em>8</em><em>)</em>

<em>neglect</em><em> </em><em>(</em><em>x </em><em>+</em><em> </em><em>1</em><em>)</em><em> </em><em>because </em><em>this</em><em> </em><em>will </em><em>in </em><em>negative</em><em> </em><em>for </em><em>X</em>

<em>=</em><em>></em><em> </em><em>x </em><em>-</em><em> </em><em>8</em><em> </em><em>=</em><em> </em><em>0</em>

<em>=</em><em>></em><em> </em><em>x </em><em>=</em><em> </em><em>8</em>

<em> </em><em>=</em><em>></em><em>so,</em><em> </em><em>x </em><em>=</em><em> </em><em>8</em><em> </em>

<em> </em><em>=</em><em>></em><em>length</em><em> </em><em>=</em><em> </em><em>8</em><em> </em><em>units</em>

3 0
3 years ago
Solve for v: -10=-5/4v
vagabundo [1.1K]

Answer:

v = 8

Step-by-step explanation:

-10= -5/4v first multiply both sides of the equation by -4/5

-10(-4/5) = v this cancels out the right side.

multiply the left side.

so you are left with 40/5 = v

next, simplify you will get 8=v

8 0
3 years ago
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Rick is a salesman whose base monthly salary is $2,200. He earns 5% commission on total sales. Last month his total earnings wer
Masteriza [31]
A Because if you subtract his monthly salary and his amount paid then multiply the amount of 5% by the extra not excluding his monthly salary you get 6500$<span />
3 0
3 years ago
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