Answer:
12 students got an A
Step-by-step explanation:
If you write 3 tenths as a decimal you get 0.3
then you multiply 40 by 0.3 to get 12
which gets you the answer of 12 students.
Answer:
78
Step-by-step explanation:
Given that:
First day (a) = 1
1 more pebble every subsequent day than the previous day
Tn = a + (n - 1)d
d = common difference ; difference between pebbles in two successive days = 1
n = nth day
At the end of the 12th day;
Tn = a + (n - 1)d
T(12) = 1 + (12 - 1) 1
T(12) = 1 + 11
T(12) = 12
Appling the sun if arithmetic progression formula : Sum of AP:
n/2 (a + Tn)
n = number of terms
12/2 (1 + 12)
6(13)
= 78
By direct evaluation we conclude that the point (x, y) = (1, - 2) lies on the graph of the <em>quadratic</em> equation h(x) = - 2 · x². (Correct choice: C)
<h3>What ordered pair lies on the curve generated by a given function? </h3>
In this problem we have three <em>ordered</em> pairs to be checked on a given function by direct evaluation, a <em>ordered</em> pair lines on the curve of function if and only if the x-value of the <em>ordered</em> pair leads to the y-value by evaluating in the function. Now we proceed to evaluate each of the three points at the function presented in the statement:
(x, y) = (1, 4)
h(1) = - 2 · 1²
h(1) = - 2
By direct evaluation we conclude that the point (x, y) = (1, - 2) lies on the graph of the <em>quadratic</em> equation h(x) = - 2 · x². (Correct choice: C)
To learn more on quadratic equations: brainly.com/question/17177510
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Answer:
P=130
Step-by-step explanation: