Answer:
![1. \quad p=\dfrac{-3q}{2}\\\\2. \quad b=\dfrac{4a+7}{2}, b=\dfrac{19}{2}\\\\3. \quad r=\dfrac{d}{t}\\\\4. \quad \text{D. 30}](https://tex.z-dn.net/?f=1.%20%5Cquad%20p%3D%5Cdfrac%7B-3q%7D%7B2%7D%5C%5C%5C%5C2.%20%5Cquad%20b%3D%5Cdfrac%7B4a%2B7%7D%7B2%7D%2C%20b%3D%5Cdfrac%7B19%7D%7B2%7D%5C%5C%5C%5C3.%20%5Cquad%20r%3D%5Cdfrac%7Bd%7D%7Bt%7D%5C%5C%5C%5C4.%20%5Cquad%20%5Ctext%7BD.%2030%7D)
Step-by-step explanation:
1. Subtract p:
3p +3q -p = 0
2p +3q = 0 . . . . collect terms
2p = -3q . . . . . . subtract 3q
p = -3q/2 . . . . . . divide by the coefficient of p
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2. Add 7 and divide by the coefficient of b:
4a +7 = 2b
(4a +7)/2 = b
Substitute for a to find the value of b.
(4(3) +7)/2 = b = 19/2
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3. Divide by the coefficient of r:
r = d/t
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4. The sum of length and width is half the perimeter:
15 + w = 90/2 = 45
w = 30 . . . . . . . subtract the length; the width is 30 units
Answer:
ahhh
Step-by-step explanation:
i dont know i wish sweet haret
Answer: b^2+5b+8
Step-by-step explanation: Hope this help :D
Answer: <DEF & <JKL
Step-by-step explanation:
they equal 90 degrees
complementary angles equal 90 degrees
Answer:
it has one solution
Step-by-step explanation: