Please help, I'm giving Brainliest to the right answer!!
2 answers:
Answer:
Option D is correct.
Step-by-step explanation:
Here, m represents the months.
We have to find the equation for which Plans A and B cost the same.
In Plan A:
No initial fees.
$75 per month.
For 1 month = $ 75
then;
for m month =$ 75 m
⇒Total cost for plan A = 75m
In Plan B:
$50 per month for first 12 month.
For 1 month = $ 50
for 12 months = 50(12)
Similarly for:
$125 per month for each additional month after that.
For additional month (m-12) = 125(m-12)
then
Total cost for plan B = 50(12)+125(m-12)
Since, Plans A and B cost the same.
⇒
Therefore, an equation gives the correct value of m, the number of months for which Plans A and B cost the same is,
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Answer: 1. d.
2. a. (5, 28)
3. a: C(n) = 0.90 n - 0.40
Step-by-step explanation:
1. Here x represents the saving of one day.
Thus, the total saving for 7 day = 7 x
And, my goal is to save at least $350.00 ( According to the question)
⇒
⇒ ( by dividing both sides by 7 )
Therefore, Option d is correct.
2. since, if a point satisfies an equation then we can say that it is the solution of the equation.
(5,28) satisfies y= 5x + 3
Because at x = 5, 5×5 + 3 = 25 + 3 = 28
except this point other points (28, 5), (4, 20) and (3, 19) are not satisfying given equation of line.
Therefore, only (5,28) is the solution of line.
⇒ Option a is correct.
3. Here n represents the number of tunas.
And, according to question the cost of one tuna = $0.90
⇒ Cost of n tunas = $ 0.90n
But again according to the question,
I have a coupon for $0.40 off your total purchase.
Thus, $ 0.40 will be less from my total purchasing cost.
⇒ The cost of n tunas = $ (0.90 n - 0.4)
Option a is correct.