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4 years ago

Use substitution to solve for x in the system of equations.

1 answer:

6 0

Equation 1) 10x + 2y = 30
Equation 2) 4x + y = 4

Multiply all of equation 2 by 2.

2) 2(4x + y = 4)

2) 8x + 2y = 8
1) 10x + 2y = 30

Subtract equations from each other.

-2x = -22

Divide both sides by -2.

x = -22/-2

x = 11

B) x = 11

~Hope I helped!~

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Krutika, David and Mark share some sweets in the ratio

Aneli [31]

Answer:

120

Step-by-step explanation:

Krutika:48

David: 48

Mark: 48÷2= 24

Because 2 : 2 : 1

48+48+24=120

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3 years ago

Junnie walked for 2.5 hours at a speed of 3.miles per hour. How far did Junnie walk?

Leona [35]

Answer:

7.5 miles

Step-by-step explanation:

2.5 times 3

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4 years ago

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Answer:

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Step-by-step explanation:

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2 years ago

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Is circumference cubed, squared, or just left alone?

irakobra [83]

Circumference is a linear distance. So if the diameter is in feet, then the circumference is also in feet (not square feet or cubic feet)

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

Example:

Let's say we had a circle with diameter d = 10 feet

The circumference is approximately...

C = pi*d

C = 3.14*10

C = 31.4

The circumference is roughly 31.4 feet

The circumference is essentially the distance around the circle's edge. We can use a flexible ruler or a string to help measure out this distance, or you can imagine laying the circle's edge to be placed along a straight line, which is another way to help measure the perimeter.

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4 years ago

Lines m and p are perpendicular. If the slope of line m is -3, what is the slope of line p?

nika2105 [10]

Answer: The slope of p is 1/3

Step-by-step explanation:

If the lines are perpendicular, this means they are opposite.

Thus, O is opposite P and since O = -3, P = 1/3

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3 years ago