Answer:
A = $4,035.13
Step-by-step explanation:
Given: 380 earns, 128.25 in 7 years and 6 months
To find: The rate percent per annum
Formula:
Solution: I = A - P = $3,655.13
Equation:
A = P(1 + rt)
First, converting R percent to r a decimal
r = R/100 = 128.25%/100 = 1.2825 per year.
Solving our equation:
A = 380(1 + (1.2825 × 7.5)) = 4035.125
A = $4,035.13
The total amount accrued, principal plus interest, from simple interest on a principal of $380.00 at a rate of 128.25% per year for 7.5 years is $4,035.13.
Answer:
1.69×4 is 6.76, but 4 bottle for 5 dollars is better. you paid less for the deal. less money by 1.76
Answer:
a=5, s=3
Step-by-step explanation:
a=adult s=student
then write 2 equations to represent the amount of people and money
a+s=8
7.25a+5.5s=52.75
• To solve a pair of equations using substitution, first solve one of the equations for one of the variables. Then substitute the result for that variable in the other equation.
{a+s=8, 7.25a+5.5s=52.75}
• Choose one of the equations and solve it for a by isolating a on the left hand side of the equal sign.
a+s=8
• Subtract s from both sides of the equation.
a=−s+8
• Substitute −s+8 for a in the other equation, 7.25a+5.5s=52.75.
7.25(−s+8)+5.5s=52.75
• Multiply 7.25 times −s+8.
−7.25s+58+5.5s=52.75
• Add −29s/4 to 11s/2.
−1.75s+58=52.75
• Subtract 58 from both sides of the equation.
−1.75s=−5.25
• Divide both sides of the equation by −1.75, which is the same as multiplying both sides by the reciprocal of the fraction.
s=3
• Substitute 3 for s in a=−s+8. Because the resulting equation contains only one variable, you can solve for a directly.
a=−3+8
• Add 8 to −3.
a=5