Debra has a stack of nickels and dimes. The number of nickels is 10 more than twice
the number of dimes. The value of her stack of
coins is $6.50. Which system of equations can
be used to find the number of nickels, n, and
dimes, d, in Debra's stack of coins?
a
n - 2d + 10
.10n + .05d = 6.50
b
n = 20 + 10
.05n+.100 = 6.50
n-d + 10
.10n + .050 -6.50
d
d = 2n + 10
.05n +. 100 = 6.50

Three cylinders have a height of 8 cm. cylinder 1 has a radius of 1 cm. cylinder 2 has a radius of 2 cm. cylinder 3 has a radius of 3 cm. find the volume of each cylinder ( ! : ”0 )

Which statement justifies why angle ebc measures 90?

For a science project, a high school research team conducted a survey of local air temperatures. based on the results of the survey, the found that the average temperatures were around 10 degrees higher than expected. this result was wrong. the trouble with the survey was that most of the locations were exposed to direct sunlight and located over asphalt or sand, which resulted in higher temperatures than normal. this is a classic example of an error in which phase of inferential statistics?