9514 1404 393
Answer:
3a by 4a
Step-by-step explanation:
For dimensions L and W, the area and perimeter are ...
A = LW = 12a^2
P = 2(L+W) = 14a
Using the second equation, we can find L:
L +W = 7a . . . . . divide by 2
L = 7a -W
Substituting into the area formula gives the quadratic ...
(7a -W)(W) = 12a^2
W^2 -7aW +12a^2 = 0 . . . . arrange in standard form
(W -3a)(W -4a) = 0 . . . . . . . factor (find factors of 12 that total 7)
Then we have the two solutions ...
W = 3a, L = 4a
W = 4a, L = 3a
The rectangle dimensions are 3a by 4a.
Answer:
5x6=30
30+3=33
i think that's the answer
Step-by-step explanation:
Answer:
Slope <em>m</em> = 3/2
General Formulas and Concepts:
<u>Pre-Algebra</u>
<u>Algebra I</u>
Slope-Intercept Form: y = mx + b
- m - slope
- b - y-intercept
Step-by-step explanation:
<u>Step 1: Define Equation</u>
3x - 2y - 6 = 0
<u>Step 2: Rewrite</u>
<em>Find slope-intercept form</em>
- Subtract 3x on both sides: -2y - 6 = -3x
- Add 6 on both sides: -2y = -3x + 6
- Divide -2 on both sides: y = 3/2x - 3
<u>Step 3: Break Function</u>
<em>Identify Parts.</em>
Slope <em>m</em> = 3/2
y-intercept <em>b</em> = -3





<em>⇨ Use the formula below</em>
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<em>⇨ Substitute the parameters:</em>
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Hope that helped
2x + 4y = 14
4x + y = 20......multiply by -4
----------------
2x + 4y = 14
-16x - 4y = -80 (result of multiplying by -4)
---------------add
-14x = -66....as u can see, ur y's cancel out
so ur answer is : 1st answer choice <==
** and just so u know, u could have multiplied the 1st equation by -2, and it would have cancelled out ur x's