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mariarad [96]
3 years ago
6

HELP PLZZZZZZ

Mathematics
1 answer:
Westkost [7]3 years ago
7 0

Step-by-step explanation:

Let x represent the number of months for the cell phone plan.

Since Lucy is contributing, Linus does not have to pay the full cost.

Instead Linus will have to pay:

($45 + $65x) - ($15 + $20x)

= $30 + $45x.

If x = 6,

Linus will pay $30 + $45(6) = $300.

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What is the midpoint between -2-3i and 3+9i
Svetlanka [38]

Answer:

1/2 + 3i is the midpoint between -2-3i and 3+9i.

Step-by-step explanation:

Given the complex number

  • -2-3i
  • 3+9i

The formula to find the midpoint of two complex number (a + bi) and (c + di) is:

M=\frac{\left(a+c\right)}{2}+\frac{\left(b+d\right)i}{2}

M=\frac{\left(-2+3\right)}{2}+\frac{\left(-3+\left(9\right)\right)i}{2}

M=\frac{-2+3+\left(-3+9\right)i}{2}

M=\frac{1+6i}{2}

M=\frac{1}{2}+3i

Therefore, 1/2 + 3i is the midpoint between -2-3i and 3+9i.

3 0
3 years ago
On a loan of $1200 at 15% annual interest, Shirley had to pay $135 interest. For how many months did she have the loan?
natulia [17]

Answer:

<u><em>9 months</em></u>

Step-by-step explanation:

Principal= P= $1200

Rate=R= 15%

Interest= I= $135

Time= T= ?

I=P*R*T/100

135= 1200*15*T/100

135*100=18000*T

13500/18000=T

T= 0.75 years

T= 0.75*12= 9 months

3 0
3 years ago
Read 2 more answers
Explain how a number line can be used to find the difference for 34-28.
den301095 [7]
You can use a number line to find the difference of 34 - 28 by starting at 34 and go backwards 20 numbers, then 8 numbers.

8 0
3 years ago
Can someone help me with this? Last one is -1/4 btw
Leya [2.2K]
2 because rise/run so 8/4 which=2
5 0
2 years ago
The table below shows the radius y, in inches, created by growing algae in x days:
Pie
Part A. The correlation coefficient, denotes as R^2, is a measure of how well does the data point correlate with a given model or equation. The closer the R^2 is to 1, the better is the correlation. However, R2=1 is ideal for scatter plots. Using the MS Excel to execute the regression, the data points was fitted to a quadratic equation. The R2=0.9983. From the choices, the closest answer would be 1. But as stated previously, a value of 1 is ideal only. Therefore, the answer is most likely 0.94,


Part B. To determine the slope, the equation would be Δy/Δx. For x=5 and x=10, the slope would be

Slope = (3-1)/(10-5) = 2/5 or 0.4. This is the instantaneous rate of change at the interval of 5 to 10 days.

Part C. The difference between causation and correlation is identifiable if you know the direct relationship between the variables. In this case, the increase in radius is not caused by time. The problem does not state so. But we know from the trend shown on a graph, that there is a correlation between these variables. Therefore, the answer is correlation.

5 0
3 years ago
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