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VikaD [51]
3 years ago
7

A cell phone is originally priced at $80. The online retailer gives a discount and the cell phone is now priced at $40. Enter th

e percentage discount for the cost of the cell phone.
Mathematics
1 answer:
Harman [31]3 years ago
4 0

Answer: The percent that the phone is on sale is 50%. The discount if 40 dollars.1/2 of the total will be taken off.

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Mike and Menna were instructed to graph the function y = 12 x + 1. Their graphs are shown.
KATRIN_1 [288]

Answer:

The function is y = 2x + 1.

And mike graphed the function correctly.

Menna took the point where the function touches x-axis incorrectly.

Instead of (-1/2,0), Menna took it as (-2,0)

Step-by-step explanation:

The equation y = mx +c indicates a straight line whose slope is m

And y-intercept is c.

y-intercept is nothing but the distance between origin and point where the graph crosses the y-axis (0,c).

Now, this graph crosses x-axis when y = 0.

⇒ mx + c = 0;       ⇒ x = \frac{-c}{m}.

Now, by comparing y = 2x + 1 with y = mx + c.

m=2 and c=1

⇒ the graph should crosses y-axis at (0,c) = (0,1)

And touch x-axis at (\frac{-c}{m} , 0) = (\frac{-1}{2},0)

⇒ mike graphed the function correctly.

Menna took the point where the function touches x-axis incorrectly.

Instead of (-1/2,0), Menna took it as (-2,0)

7 0
4 years ago
Finding the Slope: Identify the slope on the graph. I will give 10 brainlist if correct ​
lyudmila [28]

Answer:

slope = 1/2

Step-by-step explanation:

8 0
3 years ago
Find the equation of a line parallel to the line 2x-y-9=0 and passing through the point of intersection of the lines 5x+y+4=0 an
Cerrena [4.2K]

Answer:

y=2x-3

Step-by-step explanation:

1. Using the point of intersections, we use the substitution method to find the coordinates of the line parallel to 2x-y-9=0

5x+y+4=0

y= -4-5x

substituting the value of y in 2x+3y=1:

2x +3(-4-5x)=1\\\\2x-12-15x-1=0\\-13x=13x\\x= \frac{13}{-13}= -1

substituting x=-1 in y= -4-5x:

y= 1 (upon solving, you should get this)

(x,y)= (-1,1)

2. Using y=mx+c and making y the subject of the formula 2x-y-9=0 and using the coordinate we found earlier, we will find the equation of the parallel line. (We make y the subject of the formula to find the gradient)

2x-y-9=0\\2x-9=y\\y= 2x-9

y= mx+c\\

-1= 2 x 1 +c

-3=c

  • y= 2x-3

3 0
3 years ago
Please i could really use your help
Elodia [21]

ermano envia foto de lo que necesitas yo te ayudo

5 0
3 years ago
Which of the following is a solution to the equation Y= 3x-1
umka21 [38]
Your awnser is B my good sir
6 0
3 years ago
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