Usually it's fun when you know what's going on....
Answer:
he bought three math books and four english books
Step-by-step explanation:
26x3=78 (three books)
28x4=112 (four books)
112+78=190
Answer:
1/3
Step-by-step explanation:
total number of students = 15
students that chose choir as their favourite class= 5
P(choir)= 5/15 = 1/3
The total possibilities is still 4.
H H
H T <<<<
T H <<<<
T T
The two that work are marked with <<<<
H T = 1/3 * 2/3 = 2/9
T H = 2/3 * 1/3 = 2/9
The total is 2/9 + 2/9 = 4/9
We should check this
1 heads = 4/9
2 heads = 1/9
2 tails = 4/9
4/9 + 4/9 + 1/9 = 1 It checks
Answer:
y = - 4x - 3
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Here m = - 4, thus
y = - 4x + c ← is the partial equation
To find c substitute (- 2, 5 ) into the partial equation
5 = 8 + c ⇒ c = 5 - 8 = - 3
y = - 4x - 3 ← equation of line
