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stealth61 [152]
3 years ago
6

Find x and y 2x+3y=80

Mathematics
1 answer:
posledela3 years ago
3 0

Answer:

x = 40 + -1.5y

Step-by-step explanation:

Simplifying

2x + 3y = 80

Solving

2x + 3y = 80

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-3y' to each side of the equation.

2x + 3y + -3y = 80 + -3y

Combine like terms: 3y + -3y = 0

2x + 0 = 80 + -3y

2x = 80 + -3y

Divide each side by '2'.

x = 40 + -1.5y

Simplifying

x = 40 + -1.5y

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Another way to show 7 times 1/6 is, 7* .167 or 1.167
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Natali5045456 [20]

Answer:

2.  y = 7/2 x -2

3.   y = 3/4x-1

Step-by-step explanation:

points (0,-2)  (4,12)

slope = (y2-y1)/(x2-x1)

slope = (12--2)/(4-0)

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y = mx+b

y = 7/2 x -2


points (0,-1)  (4,2)

slope = (y2-y1)/(x2-x1)

slope = (2--1)/(4-0)

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the slope is 3/4 and the y intercept is -1

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How do i solve the circumference with the diameter of 1.3?
Contact [7]

Answer:

Inputs:

Radius (r):

0.65

or

Diameter (d):

1.3

or

Area (A):

1.327

Unit of Lenght:

centimeter

Calculate Circumference

Result:

The circumference of a circle with diameter 1.3 is 4.084(*)

Formulas:

r = 0.65

d = 1.3

C = 4.08

C = 2·π·r C = π·d C = √4·π·A π = 3.1415

A = area of the circle

C = circumference or perimeter

r = radius, d = diameter

Step-by-step Solution:

Circumference of a cicle in terms of radius:

Circumference = 2·π·r = 2·3.14·0.65 = 4.09(*)

In terms of diameter:

Circumference = π·d = 3.14·1.3 = 4.08(*)

In terms of area:

Circumference C = √4·π·A = √4·π·1.33 = 4.09(*)

(*) 4.084 cm exactly or limited to de precision of this calculator (13 decimal places).

Note: for simplicity, the operations above were rounded to 2 decimal places and π was rounded to 3.14.

A circumference of 4.084 centimeters is equal to:

4.084E-5 kilometers (km)

0.04084 meters (m)

40.84 millimeters (mm)

2.53768E-5 miles (mi)

0.0446632 yards (yd)

0.13399 feet (ft)

1.60787 inches (in)

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3 years ago
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check the picture below.


recall that the sum of all interior angles in a triangle is 180°, and that a flat-line like the line C, D and E are sitting on, is always 180°.

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