Can somebody help me with this question

Mathematics

2 answers:

frosja888 [35]3 years ago

8 0

A solution is when the two lines intersect, when they have the same (x,y) point. So we can say y=y which is the same as saying:

2x-15=5x

-3x-15=0

-3x=15

x=-5, now use either to solve for the y coordinate...y=5x becomes:

y=5(-5)=-25 so the solution is the point:

(-5, -25)

Alexus [3.1K]3 years ago

3 0

We start with:

y=2x-15
y=5x

Now, we have a perfectly set-up variable we can get rid of: <em>y.</em>

But we need to make either the top or bottom equation negative, so for simplicity, let's make the bottom one negative.

y=2x-15
(-y)=(-5x)

Now simplify.

-3x-15=0

Add 3x on both sides.

3x=15

Divide by 3 on both sides.

x=5

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Is 7.3 and 0.002475 rational or irrational numbers

kicyunya [14]

We are given numbers 7.3 and 0.002475 .

We need to determine if 7.3 and 0.002475 numbers are rational or irrational numbers.

Rational numbers are the numbers can be written in fraction form p/q.

Where p is numerator and q is denominator.

7.3 could be written as 73/10.

Therefore, it's a rational number.

0.002475 could be written as 2475/1000000 and it's also a rational number.

<h3>Therefore, 7.3 and 0.002475 both are rational numbers.</h3>

7 0