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damaskus [11]
3 years ago
9

Nicole and Nancy read a total of 18 books this summer. Nancy read 3 more than Nicole. How many did Nicole read?

Mathematics
2 answers:
Serjik [45]3 years ago
5 0
Assuming Nicole = x, Nancy = y

x + y = 18 \\ y = x + 3

Substitute that into
x + x + 3 = 18 \\ 2x = 15 \\ x = 7.5

Answer : Nicole read 7.5 books.

Hope this helps. - M
mestny [16]3 years ago
5 0
Let the number of books that Nicole read be x.
⇒ Nicole = x

Nancy read 3 more than Nicole
⇒ Nancy = x + 3             

They read a total of 18 books.
⇒ x + ( x+ 3) = 18

<u>Solve for x:</u>
x + ( x + 3) = 18

Remove bracket:
x + x + 3 = 18

Combine like terms:
2x + 3 = 18

Subtract 3 from both sides:
2x = 15

Divide both sides by 2:
x = 7.5

<u>Find the number of books each read:</u>
Nicole = x = 7.5 books
Nancy = x + 3 = 7.5 + 3 = 10.5 books

Answer: Nicole read 7.5 books.
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yan [13]

Answer:

y = x - 5

Step-by-step explanation:

Given the equation

y = x + ?

We are being asked what value is added to x to give y

Consider the table, that is

x = 1 → y = - 4

x = 2 → y = - 3

x = 3 → y = - 2

x = 4 → y = - 1

x = 5 → y = 0

x = 6 → y = 1

In each case 5 is being subtracted from x to obtain y, that is

y = x - 5 ← equation relating x and y

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3 years ago
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inysia [295]

Answer:

7.5 miles per hour

Step-by-step explanation:

Average speed over the interval [1, 3] = (distance at 3 hrs -distance at 1 hr)/(3 hrs - 1 hr)

From the graph:

Distance at 3 hrs = 30 => (3, 30)

Distance at 1 hr = 15 => (1, 15)

Average speed = (30 - 15)/(3 - 1)

Average speed = 15/2

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5 0
3 years ago
Help ASAP I stink at these i always give brainliest and thanks
denis23 [38]

Answer:

A

Step-by-step explanation:

Using the recursive formula with a₁ = 5 , then

a₂ = 2a₁ - 7 = 2(5) - 7 = 10 - 7 = 3

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7 0
3 years ago
36in rounded to the nearest tenth for circumference
WITCHER [35]

Answer: Remember that the tens place is two moves to the left of the decimal point (if it exists). To round to the nearest ten (nearest 10), we use the whole numbers place to determine whether the tens place rounds up or stays the same.

Solution steps:

Step 1: Locate and underline the tens place () and look to digit to the right (6):

36

Step 2: In this case, the digit to the right 6 is 5 or above. So, we add 1 to the tens place (). The digit(s) after the (6) are dropped. Thus, we get 40 as answer.

In short: 36 rounded to the nearest tens is 40.

Step-by-step explanation:

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JulijaS [17]
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