Solve the system of equations by the substitution method.
A. (-6, 6)
B. (-7, 7)
C. (7, -7)
D. no solution
Answer: B
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Solve.If a car tire is inflated to a volume of 140 cu in. of air, it has a pressure of 34 psi. If the volume is inversely proportional to the pressure, then what is the volume of air needed to inflate a tire to a pressure of 42 psi? Round to one decimal.
Fill in the blank(s) with the appropriate word(s).
Solve for x and y in the following equations: x - 2y = 4; x + y = 2
a. 2 1 x = -2Ä y = 4Ä 3 3 b. 2 2 x = 2Ä y = - Ä 3 3 c. 1 2 x = 4Ä y = 1Ä 3 3 d. 1 2 x = 2Ä y = 1Ä 3 3 e. 2 x = 2Ä y = 1 3
Clear fractions then solve by substitution.
- 
= 
+ 
= 
A. 
B. 
C. 
D. 
Use the formula A = P(1 + rt) to find the indicated quantity.Allan borrowed $5500 from his father to buy a car. He repaid him after 8 months with interest of 7% per year. Find the total amount he repaid.
A. $5724.58 B. $5885.00 C. $256.67 D. $5756.67