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iris [78.8K]
2 years ago
9

Hep asappppppppppppp

Mathematics
1 answer:
schepotkina [342]2 years ago
5 0

Answer:

(6 , -1)

Step-by-step explanation:

2x+  y  = 11   ----------------(I)

y = 11 - 2x --------------------(II)

\frac{1}{2}x - 5y = 8

Multiply the whole equation by 2

2*\frac{1}{2}x -2*5y = 2*8

x - 10y = 16 --------------------(III)

Substitute y = 11- 2x in equation (III)

x - 10(11 - 2x) = 16

x - 110 + 20x = 16

21x - 110 = 16

21x = 16 +110

21x = 126

x = 126/21

x = 6

Plugin x = 6 in equation (II)

y = 11 - 2*6

y = 11 - 12

y = -1

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Plz look at this and solve it plz
Ghella [55]

Answer:

Area= 452.16 cm2

Step-by-step explanation:

12 x 12 = 144

144 x 3.14 = 452.16

5 0
3 years ago
Which equation represents the word sentence shown below?
Llana [10]

Answer:

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Step-by-step explanation:

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7 0
3 years ago
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. Gold has a density of 19.32 g/cm3. If a square pyramid has a base edge length of 5 cm, height of 6 cm, and a mass of 942 g, is
trapecia [35]

Answer:

The answer to your question is: It is not made of gold.

Step-by-step explanation:

Data

density = 19.32 g/cm³

side = 5 cm

height = 6 cm

mass = 942 g

Formula

                          V = \frac{1}{3} L^{2}  h

L² = 5 x 5 = 25 cm²

                          V = \frac{1}{3} 25 x 6

                          V = 50 cm³

density = 942 g / 50 cm³

            = 18.84 g/cm³  

It is not made of gold because the density calculated is lower than the density reported in books.

3 0
3 years ago
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What is the volume of the prism? 6 1/2 cm 2 1/2 cm 2 1/2 cm​
mrs_skeptik [129]

Answer: 40 5/8

Step-by-step explanation:

To find the volume, you need to multiply the length, width, and height.

6 1/2 • 2 1/2 • 2 1/2 = 40 5/8

Hope this helps!

5 0
3 years ago
A 180 foot length of fence is placed around a three-sided animal pen. Two of the sides of the pen are 72 feet and 78 feet. Does
zepelin [54]

Answer:

Yes

Step-by-step explanation:

Length of the third side

180-(72+78)=30\ \text{ft}

The hypotenuse is always the longest side of a right triangle.

So, the hypotenuse here is c=78\ \text{ft}

a=72\ \text{ft},b=30\ \text{ft}

c=\sqrt{a^2+b^2}\\\Rightarrow c=\sqrt{72^2+30^2}\\\Rightarrow c=\sqrt{6084}\\\Rightarrow c=78\ \text{ft}

The Pythagoras theorem applies so the fence does form a right triangle.

3 0
3 years ago
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