Kieth nicolle Olarte
2022-10-02

You can still ask an expert for help

asked 2022-09-22

Is 4={4}?

asked 2022-06-12

What is the first step in solving the quadratic equation *x*2 – 40 = 0?

taking the square root of both sides of the equation

adding 40 to both sides of the equation

squaring both sides of the equation

subtracting 40 from both sides of the equation

asked 2022-04-01

If eight greet each other at meeting by shakinghands with one another.how many handshake take place?

asked 2022-08-26

f(x) = -5x + 10. if f(x) = 40

asked 2022-05-19

asked 2022-04-12

asked 2022-05-01

A student bought a calculator and a textbook for a course in algebra. He told his friend that the total cost was $120$\mathrm{\$}120$ (without tax) and that the calculator cost $30$\mathrm{\$}30$ more than four times the cost of the textbook. What was the cost of each item? Let x=$x=$ the cost of a calculator and y=$y=$ the cost of the textbook. The corresponding modeling system is {x+y=120x=4y+30$\{\begin{array}{l}x+y=120\\ x=4y+30\end{array}$. Solve the system by using the method of substitution