Answer:
3
Step-by-step explanation:
just took the test
Answer:
x1=-1, x2=4/5
Step by step explanation:
5x^2 - 4 + x = 0
Use the commutative property to reorder the terms:
5x^2+x-4=0
Write x as a difference:
5x^2+5x-4x-4=0
Factor out 5x from the expression:
5xx(x-1)-4x - 4=0
Factor out -4 from the expression:
5xx(x+1) - 4 (x-1)=0
Factor out x+1 from the expression:
(x-1) x (5x-4) =0
When the product of factors equal 0 at least one factor is 0
X + 1 = 0
5x - 4 = 0
Solve the equation:
The equation has two solutions
X1=-1, x2 = 4/5
Answer:
cos(x-30)=1/2
Step-by-step explanation:
We use the following relationship to obtain cos(x)
From that, we have that cos(x)= sqrt(1-1/4)=sqrt(3) / 4
To obtain the value of cos(x-30), lets remember the following expression:
Therefor, we can use that to obtain our desired function cos(x-30)
cos(x)*cos(30)+sin(x)*sin(30)
=2/4=1/2
0.3 X 10 to the power of 5!
Question #10:
To find what fraction of an onion is used per serving, divide the total amount of onion by the total number servings.
1/2 ÷ 6 = 1/12
Therefore, 1/12 of an onion was used per serving.
Question #12:
1/2 of 3/4 means that we multiply 1/2 to 3/4.
3/4 * 1/2 → 3/8
3/4 of 1/2 means we multiply 3/4 to 1/2.
1/2 * 3/4 → 3/8
Therefore, both expressions are similar.
Best of Luck!
