3 over 7, 2 over 5, 2 over 3 so your answer is b. this is the correct answer I think because1/2 equals one half 2/2 equals 1 whole hope you understand what I meanunderstand what I mean
40 percent is .4
.4 * 9999= 3999.6
You can know a perfect square trinomial:
i) if the coefficient of a² = 1.
ii) If you divide the middle number coefficient by 2 and you square it you get the last term.
Take for example the first option:
For all the options, the coefficient of a² = 1
a² + 4a + 16.
Coefficient of a = 4.
4/2 = 2
2² = 4, this does not equal the last term so it is not a perfect square trinomial.
a² + 14a + 49.
Coefficient of a = 14.
14/2 = 7
7² = 49, this is equal the last term so it is a perfect square trinomial.
And the perfect square is (a +7)²
Similarly if you test the last option.
a² + 26a + 169.
Coefficient of a = 26.
26/2 = 13
13² = 169, this is equal the last term so it is a perfect square trinomial.
And the perfect square is (a +13)²
So the only two options are: a² + 14a + 49 and a² + 26a + 169.
Other options do not pass this test.
ANSWER
The coefficient of y is

EXPLANATION
The first equation is

We can rewrite this equation in the slope intercept form to get,

We divide through by 10 to get,

The slope of this line is

and the y intercept is

Let

be the coefficient of y in the second equation.
Then, we have

We rewrite this equation too in slope intercept form to get,

Dividing through by

gives,

For the two equations to have infinitely many solution, then they must have the same slope and y intercept.
This means, that,

This implies that

Therefore the coefficient of y must be 2.