How to solve 5(x-3)+2=7?step by step please help me math tutor. Right answer only.

Answers

Answer 1

Answer: $5(x-3)+2=7$

$(5*x)+(5*-3)+2=7$

$5x-15+2=7$

$5x-13=7$

$5x-13+13=7+13$

$5x=20$

$(5x)/(5) = (20)/(5)$

$x=4$

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Josiah invests $360 into an account that accrues 3% interest annually. Assuming no deposits or withdrawals are made, which equation represents the amount of money in Josiah’s account, y, after x years?

Answers

The future amount of money that is invested currently at a certain interest that is compounded annually is calculated through the equation,
F = P x (1 + i)^n
where F is the future worth, P is the present worth, i is the interest rate, and n is the number of years. Substituting the known values and variables in the given, F = ($360)(1.03)^x

Answer: $y = 360(1.03)^x$

Step-by-step explanation:

Since, the principal amount of the money = $ 360

Annual rate of interest = 3%

Thus, the amount after x years which is increased by 3 %,

$= 360(1+(3)/(100) )^x$

$= 360(1+0.03 )^x$

$= 360(1.03 )^x$

Since, this amount represented by y,

Thus, the required equation that represents the amount of money in Josiah’s account, y, after x years is,

$y = 360(1.03 )^x$

oliver drove 90 mph of his journey in 1.5 hours and the remaining 120 miles in 3 hours. what was his average speed in the first part of his trip?