3x + 4y = 17.....multiply by 4
-4x - 3y = -18 ...multiply by 3
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12x + 16y = 68 (result of multiplying by 4)
-12x - 9y = - 54 (result of multiplying by 3)
------------------add
7y = 14
y = 14/7
y = 2
3x + 4y = 17
3x + 4(2) = 17
3x + 8 = 17
3x = 17 - 8
3x = 9
x = 9/3
x = 3
ur solution is (3,2)
15 * 0 = -36 + a is your first expression
Solve the equation to find.
Add 36
(15 * 0) + 36 = a
0 + 36 = a
36 = a
Your second equation
24 * 8 * 0 = 36 - b
Add 36
(24 * 8 * 0) + 36 = b
36 = b
36 is the answer
Answer:
R(7a, 0 )
Step-by-step explanation:
R is on the vertical line RQ so will have the same x- coordinate as Q
R is on the horizontal line OR so will have the same y- coordinate as O
Thus coordinates of R = (7a, 0 )
Answer: C) 297 in2
Step-by-step explanation:
Hi, to answer this question we have to apply the next formula:
Surface area of a square pyramid (S) = 2 (length of the base) slant + length of the base ^2
S = 2bs + b^2
Replacing with the values given:
S = 2 (9) 12 + 9^2
S = 216 +81 = 297 square inches
Feel free to ask for more if needed or if you did not understand something.
I'm 90% sure that angle i = 114°.