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Nadya [2.5K]
3 years ago
7

Someone help me with question #1 plzz

Mathematics
1 answer:
Oliga [24]3 years ago
6 0

Answer:

x = 8 units

Step-by-step explanation:

Note that the ratio of the middle-length legs is 12/18, and that of the shortest-length legs is x/12.

Then:

12        x

----- = -----

18       12

... which, through cross- multiplication, becomes 18x = 144.  Then x = 8 units

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Work out the gradient of the straight line that passes through (2,6) and (6,12)
Furkat [3]

Answer:

The gradient of the straight line that passes through (2, 6) and (6, 12) is m = \frac{3}{2}.

Step-by-step explanation:

Mathematically speaking, lines are represented by following first-order polynomials of the form:

y = b + m\cdot x (1)

Where:

x - Independent variable.

y - Dependent variable.

m - Slope.

b - Intercept.

The gradient of the function is represented by the first derivative of the function:

y' = m

Then, we conclude that the gradient of the staight line is the slope. According to Euclidean Geometry, a line can be form after knowing the locations of two distinct points on plane. By definition of secant line, we calculate the slope:

m = \frac{y_{B}-y_{A}}{x_{B}-x_{A}} (2)

Where:

x_{A}, y_{A} - Coordinates of point A.

x_{B}, y_{B} - Coordinates of point B.

If we know that A(x,y) = (2,6) and B(x,y) = (6,12), then the gradient of the straight line is:

m = \frac{12-6}{6-2}

m = \frac{6}{4}

m = \frac{3}{2}

The gradient of the straight line that passes through (2, 6) and (6, 12) is m = \frac{3}{2}.

5 0
2 years ago
A rectangle is drawn so that the width is 4 feet shorter than the length. the area of the rectangle is 32 square feet. find the
Bogdan [553]
L=W-2LW=35 substitute in W-2 for L(W-2)(W)=35W2 -2w -35=0(W-5)(W-7)=0therefore w=7 and L=5
3 0
3 years ago
4 minute mile whats the average speed mi/min
g100num [7]

1/4 mile per minute is the average speed.

8 0
3 years ago
Read 2 more answers
How many solutions does the following linear equation have?<br> y = -2x -4<br> y = 1/2x - 5
Andrews [41]

Answer:

x=2/5, y=-24/5. (2/5, -24/5).

Step-by-step explanation:

y=-2x-4

y=1/2x-5

----------------

-2x-4=1/2x-5

-2x-1/2x-4=-5

-4/2x-1/2x=-5+4

-5/2x=-1

5/2x=1

x=1/(5/2)

x=2/5

y=1/2(2/5)-5

y=1/5-5

y=1/5-25/5

y=-24/5

5 0
3 years ago
Which line represents the linear equation
IgorLugansk [536]

Answer:

The equation –3y = 15 – 4x rewritten in slope-intercept form is  

✔ y = (4/3)x – 5

.

The y-intercept is  

✔ –5

and the slope of the line is  

✔ 4/3

.

Line  

✔ B

is the graph of the line –3y = 15 – 4x.

8 0
2 years ago
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