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Readme [11.4K]
3 years ago
6

Stephanie earned 8 points for every book she read over the summer. The equation y = 8x represents Stephanie's points based on th

e number of books she read.
Use the table and equation to complete the statements and find the number of books Stephanie read.

1. Stephanie earned 72 points. Did she read fewer than 2 books, between 2 and 5 books, between 5 and 6 books, or more than 7 books? Explain how you know.


2. The equation y = 8x gives the points, y, earned by reading x books.

Use this equation to find the number of books Stephanie read to earn 72 points. Show your work.

(here are the tables)(plz answer both and dont be greedy as * and say i d k and get pts!)

Mathematics
1 answer:
7nadin3 [17]3 years ago
8 0

Answer: multiply 8 on all x number of books read

Step-by-step explanation:

1 is 8 because 8 × 1 is 8

2 is 16 because 8 × 2 is 16

3 is 24 because 8 × 3 is 24

4 is 32 because 8 × 4 is 32

5 is 40 because 8 × 5 is 40

6 is 48 because 8 × 6 is 48

7 is 56 because 8 × 7 is 56

8 is 64 because 8 × 8 is 64

9 is 72 because 8 × 9 is 72

10 is 80 because 8 × 10 is 80

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Please answer this with explanation. Please I really am struggling. I will mark you brainalist. Please solve it Please
Hatshy [7]

Answer:

13, 11, 4, 16, 6, 22

Step-by-step explanation:

<em>Let the second digit be x and the last digit be y</em>

Given:

  • Data set: 13, x, 4, 16, 6, y
  • Mean = 12
  • y = 2x or x = 2y

The mean of the data is the average. The average can be calculated by determining the sum of the terms and dividing it by the total digits.

\implies \text{Mean of data:} \ \dfrac{13 + x + 4 + 16 + 6 + y}{6} = 12

Let us substitute the value of y (2x) in the data.

\implies \dfrac{13 + x + 4 + 16 + 6 + 2x}{6} = 12

Now, add all the terms in the data and simplify.

\implies \dfrac{39 + x +2x}{6} = 12

\implies \dfrac{39 + 3x}{6} = 12

Distribute the denominators and simplify.

\implies \dfrac{39}{6} + \dfrac{3x}{6}  = 12

\implies  \dfrac{13}{2} + \dfrac{x}{2}  = 12

\implies  6.5 + \dfrac{x}{2}  = 12

Subtract 6.5 both sides and simplify.

\implies  6.5 + \dfrac{x}{2}  - 6.5 = 12 - 6.5

\implies \dfrac{x}{2} = 5.5

Use cross multiplication and simplify.

\implies x= 5.5 \times 2

\implies  x= 11

To determine the value of "y", simply substitute the value of "x" into the expression that represents the value of "y".

\implies y = 2x

\implies y = 2(11)

\implies y = 22

When the x and y values are substituted in the data, we get;

  • ⇒ 13, 11, 4, 16, 6, 22

Therefore, the data is 13, 11, 4, 16, 6, 22.

8 0
2 years ago
Place the indicated product in the proper location on the grid (x+y+3)(x+y-4)
pashok25 [27]

Solution:

we have been asked to find the product of (x+y+3)(x+y-4).

we will multiply term by term as below

(x+y+3)(x+y-4)=x(x+y+3)+y(x+y+3)-4(x+y+3)\\\\\ (x+y+3)(x+y-4)=x^2+xy+3x+xy+y^2+3y-4x-4y-12\\\\\text{Now take the like terms together and simplify we get}\\\\(x+y+3)(x+y-4)=x^2+y^2+2xy-x-y-12\\

Hence the the product of (x+y+3)(x+y-4) is x^2+y^2+2xy-x-y-12


6 0
3 years ago
What does a graph look like if it has a proportional relationship
Pie

Answer: The line is straight and it goes through the origin

Step-by-step explanation: :D

8 0
3 years ago
Explain why a square must be a rectangle, but a rectangle does not have to be a square
Oduvanchick [21]

So a square is a special kind of rectangle, it is one where all the sides have the same length. Thus every square is a rectangle because it is a quadrilateral with all four angles right angles. However not every rectangle is a square, to be a square its sides must have the same length.

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4 years ago
Rhion sat maths and English test
Sauron [17]

Answer:

Rhion did better in maths test.

Step-by-step explanation:

Given that:

Rhion scored 14 out of 17.

We will find percentage and then compare them.

Percentage = \frac{Score}{Total\ marks}*100

Percentage = \frac{14}{17}*100

Percentage = 82.35%

Rhion scored 31 out of 39.

Percentage = \frac{31}{39}*100

Percentage = 79.48

On comparing,

82.35 > 79.48

Hence,

Rhion did better in maths test.

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