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scoray [572]
3 years ago
15

Pls help I really need a good grade on this

Mathematics
1 answer:
Mice21 [21]3 years ago
5 0

Answer:

y=78

Step-by-step explanation:

\frac{y}{13}-2=4

\frac{y}{13}-2+2=4+2 (Add 2 to both sides to isolate y)

\frac{y}{13}=6 (Simplify)

\frac{y}{13}*13=6*13 (Multiply both sides of the equation by 13 to get rid of the denominator)

y=78 (Simplify)

Hope this helps!

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Answer:

64 = 1 x 64, 2 x 32, 4 x 16, or 8 x 8.

Hope that helps!

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Is this true 1/2 >0.25
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Write x^2 − 2x − 3 = 0 in the form (x − a)^2 = b, where a and b are integers.
Airida [17]
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(x² - 2x + [?])² - 3 = 0

so, we have a missing fellow there, in order to make the group, a perfect square trinomial, namely to "complete the square", hmmm so the tell-tale fellow is the middle term.

from a perfect square trinomial we know that the middle term is a product of 2 and the "term on the left" and the "term on the right", like 

\bf \begin{array}{cccccllllll}
 a^2& + &2 a b&+& b^2\\
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\end{array}\qquad \qquad \quad 
\begin{array}{cccccllllll}
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\bf \textit{therefore}\qquad 2(x)(\boxed{?})=\stackrel{middle~term}{2x}\implies \boxed{?}=\cfrac{2x}{2x}\implies \boxed{?}=1

aha!!  so our missing fellow is 1.

now, let's keep in mind that all we're doing is borrowing from our very good friend Mr Zero, 0.  So if we add 1², we also have to subtract 1².

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