Answer:
no, Sara subtracted 2x on one side and added 2x on the other side
Step-by-step explanation:
The addition property of equality requires that the same value be added to both sides of an equation.
Sara wants to remove the -2x term from the right side of the equation, so rightfully adds 2x to that side of the equation. According to the addition property of equality, she must also add 2x to the left side of the equation. This will give her ...
5x ≤ 2
x ≤ 2/5 . . . . divide both sides by 5
6. Expand the left side:
Recall the Pythagorean identity,
which leaves us with
Recall the angle sum formula for cosine:
which gets us to where we need to be:
and we're done.
7. A. The formulas you need are
This gives
7. B. Solving for gives
which holds for
where is any integer.
7. C. Factorize as
From here, we have
which hold for
where is any integer.
10x= -8x + 36
-8x -8x
———————-
2x= 36
— —
2 2
X=18
Answer:
(4 - a)^2 = 16-8a + a^2
(3x − 1)^2 = 9x^2−6x+1
Step-by-step explanation:
Multiply the left for each equation and they are the same.
The number of chirps is on the horizontal axis.....so the number of chirps is gonna be the x value and the temp is the y value.
y = 3x + 25......when the temp is 55....so y = 55
55 = 3x + 25
55 - 25 = 3x
30 = 3x
30/3 = x
10 = x.......number of chirps per second is 10 <==