David is making patterns using these rules. Rule for Pattern A: start with 20 and subtract 2 Rule for Pattern B: start with 10 a
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A defines the function
f(1) = - 8 ×( = - 8 × 1 = -8
f(2) = - 8 ×( = -
= - 20
f(3) = - 8 ×( = - 8 ×
= - 50
f(4)= - 8 ×( = - 8 ×
= -125
f(5) = - 8 ×( = - 8 ×
= -
Answer:
The inequality can be represented as:
where represents the number of weeks in which Maria will be able to buy a phone for least $200.
On solving it we get :
Step-by-step explanation:
Given:
Maria wants to buy a phone for at least $200.
She has savings of $125.
She plans to save $10 every week.
To write an inequality for the situation.
Solution:
Let the number of weeks in which Maria will be able to buy a phone be =
If she saves $10 each week.
Then, in weeks she will save in dollars =
She already has savings = $125
So her total savings in weeks in dollars will be =
She wants to buy a phone for at least $200.
Thus, the inequality can be represented as:
Solving for
Subtracting both sides by 125.
Dividing both sides by 10.
Thus Maria needs at least 7.5 weeks to be able to buy a phone for atleast $200.