Your friend says that any system of equations that can be solved by elimination can be solved by substitution in an equal or fewer number of steps. Order the steps for solving the system by each method to determine if your friend is correct. Only solve for one variable. The steps after solving for one variable are the same. 8x−5y=11 Equation 1

4x−3y=5 Equation 2

I’m still confused on how to work the percentages

Polygon abcd is a rectangle what is the area

At wind speeds above 1000 centimeters per second (cm/sec), significant sand-moving events begin to occur. wind speeds below 1000 cm/sec deposit sand and wind speeds above 1000 cm/sec move sand to new locations. the cyclic nature of wind and moving sand determines the shape and location of large dunes. at a test site, the prevailing direction of the wind did not change noticeably. however, the velocity did change. fifty-nine wind speed readings gave an average velocity of x = 1075 cm/sec. based on long-term experience, σ can be assumed to be 245 cm/sec. (a) find a 95% confidence interval for the population mean wind speed at this site. (round your answers to the nearest whole number.) lower limit cm/sec upper limit cm/sec