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mylen [45]
3 years ago
14

Solve the system. x+3y=7 2x-4y=24

Mathematics
1 answer:
Alina [70]3 years ago
7 0

Answer:

y= -1 and x = 10

Step-by-step explanation:

(1) x+3y=7

(2) 2x-4y=24

Clear x from the 1st equation: x=7-3y

And replace x from the 2do one: 2(7-3y)-4y=24

14-6y-4y=24

-6y-4y=24-14

-10y=10

y=-10/10

y=-1

Now we have y=-1, let's finde x:

x=7-3y

x=7-3(-1)

x=7+3

x=10

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malfutka [58]

Answer:

56 + 53pi

Step-by-step explanation:

<u><em>Area of small circles:</em></u>

diameter of small circle: 4cm

forumla to find area of circle: A = pir^2

r is radius = half of diameter -> d/2 = 4 / 2 = 2cm

A = pi (2cm)^2

A = pi (4cm)

A = 4pi

<u><em>Area of large circle:</em></u>

diameter of small circle: 4cm

forumla to find area of circle: A = pir^2

r is radius = half of diameter -> d/2 = 14 / 2 = 7cm

A = pi (7cm)^2

A = pi (49cm)

A = 49pi

<u><em>Area of rectangle:</em></u>

Area = width x length

Area = 14cm x 4cm

Area = 56cm

<u><em>Add all three areas:</em></u>

Area of rectangle + large circle + small circle

56cm + 49pi + 4pi = 56cm + 53pi

7 0
2 years ago
What is the value of the 8's in 88,000
kenny6666 [7]
If you're asking for place value:
Thousands, and Ten Thousands place.

Just value:
8,000 and 80,000
7 0
3 years ago
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zvonat [6]
Sine = opposite / adjacent.

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3 years ago
Nathan is collecting aluminum cans for charity. One empty 355 ml can weighs about 17 g. It takes 59 cans to get about 1 kg of 10
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Answer:

33.5 kg

Step-by-step explanation:

Each 59 cans are about 1 kg.

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