9514 1404 393
Answer:
10 +8i
Step-by-step explanation:
You add these the same way you would if they were considered to be polynomials.
(7 +2i) +(3 +6i) = (7 +3) +(2 +6)i = 10 +8i
Answer:
y - 3 = ⁵/₂(x - 2) {the point-slope form of the equation}
y = ⁵/₂x - 2 {the slope-intercept form of the equation}
5x - 2y = 4 {the standard form of the equation}
Step-by-step explanation:
The point-slope form of equation is: y - y₀ = m(x - x₀), where (x₀, y₀) is any point the line passes through and m is the slope.
m = ⁵/₂
(2, 3) ⇒ x₀ = 2, y₀ = 3
So, the point-slope form of the equation:
y - 3 = ⁵/₂(x - 2)
Therefore:
y - 3 = ⁵/₂x - 5 {add 3 to both sides}
y = ⁵/₂x - 2 ← the slope-intercept form of the equation
-⁵/₂x + y = - 2 {multiply both sides by (-2)}
5x - 2y = 4 ← the standard form of the equation
Answer:
2r+1+(-4r)+7
= -2r+8
= -2(r+4)
Step-by-step explanation:
Answer: I believe it’s E
Step-by-step explanation:
I think it’s E for the fact that 2 DVD and 1 Video game rental costs 12 and so 2 DVDs cost the same as 1 video game rental so therefore I think it’s E.
I hoped this helped having another’s opinion.
Answer:
Step-by-step explanation:
In equation form,
children + adults = 48 people at the library.
If the number of children is 3 times the number of adults, then in equation form:
children = adults*3
Let's call children c and adults a. Subbing the second equation into the first gives us an equation with only one unknown instead of 2.
c + a = 48 after making the substitution is
3a + a = 48 and
4a = 48 so
a = 12
There were 12 adults. If the total number of people was 48, then
48 - 12 = number of children so
c = 36