We will represent everything in cents
nickles are worth 5 cents and dimes are 10 cents
n=number of nickles
d=number of dimes
60 total coins
n+d=60
total is 430 cents
5n+10d=430
divide both sides by 5
n+2d=86
we gots
n+d=60 and
n+2d=86
eliminate
multiply first equation by -1 and add to 2nd equation
-n-d=-60
<u>n+2d=86 +</u>
0n+1d=26
d=26
so
n+d=60
n+26=60
n=34
34 nickles and 26 dimes
Answer:
56 and and (6×5)+7 is correct answer
<h2>
Answer:</h2>
<u>We can use t-test </u><u>to compare the two treatments statistically</u>
<h2>
Step-by-step explanation:</h2>
T test is used as a hypothesis testing tool, which allows testing of an assumption applicable to a population. It is usually used when the data sets such as the set of data recorded as a result from flipping a coin a 100 times will follow a normal distribution and may have unknown variances.The t-test is one of many tests used for the purpose of hypothesis testing in statistics.
Answer:
Option (2)
Step-by-step explanation:
Option (1).
Points A, B and D are collinear.
True. (On plane S)
Option (2).
Points A, B, C and E are coplanar.
False.
(Points A, B and D are on plane S and points C and E are on plane R)
Option (3).
BE intersects line 'n' at point B.
True.
Option (4).
CB ⊥ AD
(CB lies on plane R and AD lies on perpendicular plane S).
Option (5).
Line 'm' ⊥ plane R.
True.
(Line m is on plane S which is perpendicular to plane R).
Option (6).
Plane R intersects plane S at line n.
True.
Plane R and Plane S are perpendicular and the point of intersection is line 'n'.
Therefore, Option (2) is incorrect.
I did this last year it is <span>D.
an=(2)an-1-2</span>