Moisture content in percent by volume (x) and conductivity in ms/m (y) were measured for 76 soil specimens. the means and standard deviations were x- = 7.9, sx = 1.3, y- = 28.7, sy = 1.8. the correlation between conductivity and moisture was computed to be r = 0. 77. find the equation of the least squares line for predicting soil conductivity from moisture content. round the intercept to three decimal places and slope to four decimal places. the equation of the least square line, y = + x.

d. millimeters per hour.

step-by-step explanation:

we are given that,

carlo used a rain gauge to measure the amount of water his lawn is receiving from the sprinklers.

since, according to the options, we see that,

water cannot be measured by 'miles per hour', 'meters per second' and 'grams per seconds'.

we get that, the water can be measured by 'millimeters per hour'.

hence, the appropriate rate for describing the amount of water is 'millimeters per hour'.

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -

combine all like terms then its just a 2 step equation