Math Test 20 40 7
Science Test 15 35 5
Which percentage of students took the math test and received a grade of 90 or above?
16.39%
29.85%
57.14%
28.69%
Let event A = "math test" and event B = "Score: 90-100." Then find , where
To find the percentage of students who took the math test and received a grade of 90 or above, we need to calculate the conditional probability P(A ∩ B), which is the probability of event A ("math test") and event B ("Score: 90-100") happening simultaneously.
From the two-way frequency table:
The number of students who took the math test and received a grade of 90 or above is 20.
The total number of students who took the math test is 20 + 40 + 7 = 67.
Now, we can calculate the conditional probability:
P(A ∩ B) = (Number of students who took the math test and received a grade of 90 or above) / (Total number of students who took the math test) × 100%
P(A ∩ B) = 20 / 67 × 100% ≈ 29.85%
So, the percentage of students who took the math test and received a grade of 90 or above is approximately 29.85%.
4
What’s the two solutions
Answer:
hi
Step-by-step explanation:
Answer:
x = 9
Step-by-step explanation:
M is at the midpoint of GA and N is at the midpoint of HA, hence
MN is a mid-line segment and is half the length of GH, that is
5x = (15x - 45) ← multiply both sides by 2
10x = 15x - 45 ( subtract 15x from both sides )
- 5x = - 45 ( divide both sides by - 5 )
x = 9
Answer:
y = 12
Step-by-step explanation:
We first need to solve for x
(6x - 11)° and (4x + 23)° are vertically opposite angles and are congruent, so
6x - 11 = 4x + 23 ( subtract 4x from both sides )
6x - 4x - 11 = 4x - 4x + 23 ( simplify both sides )
2x - 11 = 23 ( add 11 to both sides )
2x - 11 + 11 = 23 + 11 ( simplify both sides )
2x = 34 ( divide both sides by 2 )
x = , that is
x = 17
Then
4x + 23 = 4(17) + 23 = 68 + 23 = 91
(9y - 19)° and 91 are a linear pair and sum to 180°
sum the 2 angles and equate to 180
9y - 19 + 91 = 180 ( simplify left side )
9y + 72 = 180 ( subtract 72 from both sides )
9y + 72 - 72 = 180 - 72 ( simplify both sides )
9y = 108 ( divide both sides by 9 )
y = , that is
y = 12
Write a linear function f(x) with the values f(3) = -1 and f(6) = 1.