I really need help please:((

Mathematics

2 answers:

OLga [1]2 years ago

8 0

3x - 2y = 18

3( 7 ) - 2( 3 ) = 18
24 - 6 = 18

Nimfa-mama [501]2 years ago

5 0

Answer:

x = 6

y = -9

Step-by-step explanation:

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23 in. The perimeter of this quadrilateral is 100 in. What is the length of the side not given? 27 In. 32 in.

-Dominant- [34]

Answer:

Solution:

The formula to find the perimeter of the quadrilateral = sum of the length of all the four sides.

Here the lengths of all the four sides are 5 cm, 7 cm, 9 cm and 11 cm.

Therefore, perimeter of quadrilateral = 5 cm + 7 cm + 9 cm + 11 cm

= 32 cm

3 0

2 years ago

What is the exact answer is betwwen 6×7,381

Alex Ar [27]

You can do:
6x7000 then
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5 0

3 years ago

Read 2 more answers

This composite shape is a rectangle with a semicircle attached on one end. The diameter of the semicircle is 6 feet.

Ugo [173]

As we can see on the picture we have a rectangle and half of circle.

The areas for half circle and rectangle are:

$A_{rectangle}=a\cdot b \\A_{halfcircle}=\frac{A_{circle}}{2}=\frac{\pi r^2}{2}$

The area of the figure is the sum of the area of half circle and rectangle. Also the height of a rectangle (6ft) is a diameter of a half circle therefore the radius of half circle is 6ft ÷ 2 = 3ft.

Now we calculate the areas.

$A_{rectangle}=10\cdot 6=\underline{60} \\A_{halfcircle}=\frac{3.14\cdot3^2}{2}=\underline{14.13} \\A_{total}=A_{rectangle}+A_{halfcircle} =60+14.13=\boxed{74.13\approx74}$