Translate the following verbal statement into an algebraic

What is the value of the digit in the hundredths place for 0.44?

Write and solve an equation to find the number. Four times the difference of a number and 7 is 12.

Write an algebraic expression for the verbal description. The total revenue obtained by selling x units at $10.74 per unit $?

Sun-Yi estimated 270 + 146 and got 320. Is her estimate reasonable? Explain.

A student bought a calculator and a textbook for a course in algebra. He told his friend that the total cost was $145(without tax) and that the calculator cost $20 more than four times the cost of the textbook. What was the cost of each item? Let ${\displaystyle x=}$ the cost of a calculator and ${\displaystyle y=}$ the cost of the textbook. The corresponding modeling system is ${\displaystyle x+y=145}$
${\displaystyle x=4y+20}$
Solve the system by using the method of substitution and enter the ordered pair

${\displaystyle 4(\left(\frac{t}{8}\right)+5)}$

Which digit is in the ten thousands place in 782,341,693?