Number of long distance calls made = m
Total phone bill = $3.40 = 340 cents
Cost per minute for long distance call = 3.3 cents
Then
<span>3.3m = 3.40
On solving we get
m = 340/3.3
= 103 minutes
From the above deduction, it can be concluded that the correct option among all the options that are given in the question is the first option. I hope the answer has come to your help.</span>
Answer:.,
b
Step-by-step explanation:
Trust me
<u>Part A</u>
x² + 5x + 4 = 0
x = <u>-(5) +/- √((5)² - 4(1)(4))</u>
2(1)
x = <u>-5 +/- √(25 - 16)</u>
2
x = <u>-5 +/- √(9)</u>
2
x = <u>-5 +/- 3</u>
2
x = <u>-5 + 3</u> U x = <u>-5 - 3</u>
2 2
x = <u>-2</u> x = -<u>8</u>
2 2
x = -1 x = -4
<u>Part B</u>
4x² - 12x + 5 = 0
x = <u>-(-12) +/- √((-12)² - 4(4)(5))</u>
2(4)
x = <u>12 +/- √(144 - 80)</u>
8
x = <u>12 +/- √(64)</u>
8
x = <u>12 +/- 8</u>
8
x = <u>3 +/- 2</u>
2
x = <u>3 + 2</u> U x = <u>3 - 2</u>
2 2
x = <u>5</u> x = <u>1</u>
2 2
x = 2.5 x = 0.5
<u>Part C</u>
2x² - 10x + 3 = 0
x = <u>-(-10) +/- √((-10)² - 4(2)(3))</u>
2(2)
x = <u>10 +/- √(100 - 24)</u>
4
x = <u>10 +/- √(76)</u>
4
x = <u>10 +/- 2√(19)</u>
4
x = <u>5 +/- √(19)</u>
2
x = 2.5 <u>+</u> 0.5√(19)
x = 2.5 + 0.5√(19) U x = 2.5 - 0.5√(19)
Answer:
Step-by-step explanation:
Let n represent the number of shirts in thousands and P represent the charge per shirt. n is the independent variable and P is the dependent variable.
Since 3000 shirts sell for $69 each, this can be represented as (3, 69). Also 7000 shirts sell for $61 each, this can be represented as (7, 61).
The equation showing the relationship is gotten using:
<span> 5 and -3
5+(-3)=2
5(-3)=-15</span>
