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3 years ago

How many solutions does the system 2y=10x-14 and 5x-y=7 have ?

1 answer:

7 0

I find it of tremendous use to convert to the slope intercept form to easily visualize the lines. The first is:
y = 5x - 7 [Dividing both sides by 2] and the second is:
-y = -5x + 7 [Subtracting 5x from each side]
y = 5x - 7 [Dividing each side by -1]

These two equations represent the same line. If the lines were parallel, there would be no solution. If the lines intersected, there would be only one unique solution satisfying both equations (the point of intersection).

In this case, where the two equations represent the same line, the number of solutions is infinite.

The answer is: <span>∞

</span>

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What is the perimeter of the fifth square in this pattern?

Rom4ik [11]

I think its 144 because its the fifth square

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3 years ago

Find an equation to the line tangent to y = 5 + |x – 2| at the coordinate (2, 5) pls answer

myrzilka [38]

Answer:

Step-by-step explanation:

Finding an equation of a tangent line to that function requires that we find the derivative of the function at that point. Since this is an absolute value function with its cusp at (2, 5), the function is not differentiable here.

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3 years ago

A temperature record in Antarctica was -120.the temperature recorded in the Sahara desert was 129.how many degrees warmer is 129

allochka39001 [22]

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3 years ago

A piece of steel pipe 12.5 feet long weighs 158 pounds. How much does a piece of the same steel pipe 18.75 feet long weigh?

jonny [76]

Answer:

18.75 feet of steel pipe weighs 237 pounds

explanation:

find out how much 1 feet weighs than u can find out how much 18.75 feet.

by doing it like this

158÷ 12.5

=12.64

1 feet equals 12.64 pounds

12.64× 18.75

=237 pounds this is the answer

i do apologize if it wrong

8 0

3 years ago

Read 2 more answers

3.) mr. smith’s class sold wrapping paper for $3.50 each and mr. davis’ class sold magazines for $2.75 each. together, the class

igor_vitrenko [27]

Answer:

The number of wrapping paper sold was 32 and the number of magazines sold was 40

Step-by-step explanation:

Let

x ----> the number of wrapping paper sold

y ----> the number of magazines sold

we know that

The classes sold 72 items

$x+y=72$ ----> equation A

The classes earned $222 for their school

$3.50x+2.75y=222$ ----> equation B

Solve the system of equations by graphing

Remember that the solution of the system of equations is the intersection point both graphs

using a graphing tool

The solution is (32,40)

see the attached figure

therefore

The number of wrapping paper sold was 32 and the number of magazines sold was 40

7 0

3 years ago