Answer:
Option A is correct.
Step-by-step explanation:
2x+3y=25
4x+2y=22
Option A
2y = 22-4x
y = 11 -2x
Option B
2x = 25 -3y
x = 25/2 -3/2y
Option C
3y = 25 - 2x
y = 25/3 -2/3x
Option D
4x = 22 - 2y
x = 22/4 -2/4y
x = 11/2 -1/2y
In Option B,C and D we have fractions and for substitution the calculations will be complex.
But Option A has no fractions and solving by putting the value of y in equation 1 is easy.
So, Option A is correct.
Answer:
11 roses and 12 carnations
Step-by-step explanation:
(11*3)+(1.50*3)=195
Answer:
a
Step-by-step explanation:
Not understanding this, is there a problem?
Answer:
The period of the model is seconds. The period represents the time needed for the function to complete one cycle.
Step-by-step explanation:
Cosine is a trigonometric function and trigonometric functions are characterized by having a periodical behavior. The period is the time needed for the function to cover an angle of radians. By this approach we find that:
(1)
Where:
- Time, measured in seconds.
- Period, measured in seconds.
Then, we solve (1) for :
The period of the model is seconds. The period represents the time needed for the function to complete one cycle.