Answer:
C. There is not enough information to make any conclusions regarding the new review booklet.
Step-by-step explanation:
Given that A statistics teacher conducted an experiment to test whether the use of a new review booklet will improve her students' semester grades.
also given that The teacher randomly selected 20 students from her class and assigned the new review booklet to 10 of the students. The remaining 10 students did not use any review material.
The semester grades did not differ for both groups.
But we cannot conclude the booklet has no effect because,
i) The sample size is very small, only 10. Hence not reliable
ii) We do not know the previous performance of both the groups. To ensure improvement the grades the students got in the previous exam also should be considered.
Answer:
x=-4
Step-by-step explanation:
1. subtract 16 from both sides which leaves you left with
x=-4
Answer:
<h2><u><em>
8x -2</em></u></h2>
Step-by-step explanation:
Subtract:
-6x-3 from 2x-5
2x - 5 -(-6x - 3) =
2x - 5 + 6x + 3 =
8x -2
Answer:
A) x = 11 tan 49°
B) 12.7 inches
C) 14.7 inches
Step-by-step explanation:
(refer to attached for reference)
Let the length of the vertical side of the triangular sail be x
recall that for right angle triangle, the following trigonometric relation applies:
tan θ = length of opposite side / length of adjacent side
in our case,
θ = 49°
length of adjacent side = 11 inches
length of opposite side = length of vertical edge of sail = x (which we defined above)
hence we can assemble our formula
tan 49° = x / 11 (rearranging)
x = 11 tan 49° (Answer for A)
Using a calculator to solve this gives
x = 12.65 inches
x = 12.7 inches (to nearest tenth) (Answer for B)
The height of the mast is merely the height of the sail plus the 2" length of mast extending below the sail.
Mast height = 12.7" + 2" = 14.7" (Answer for C)
Answer:6 or decimal 23.23790
Step-by-step explanation:
the prime factorization of 60: 2^2 * 3 * 5
=