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Sophie [7]
2 years ago
13

50 students were asked what they did last night. 16 said they read a book, 41 said they watched TV, 7 said they did neither, how

many students did both​
Mathematics
1 answer:
Kamila [148]2 years ago
6 0

Answer:

14 students

Step-by-step explanation:

Given

Let:

b \to read a book

t \to watched TV

So, we have:

n = 50 -- total

b = 16

t = 41

none = 7

Required

Students that did both (x)

This is calculated using:

Total = Books\ only + TV\ only + Both + None

So, we have:

n = (b - x) + (t - x) + x + none

This gives:

50 = (16 - x) + (41 - x) + x + 7

Open brackets

50 = 16 - x + 41 - x + x + 7

50 = 16 - x + 41 +7

Collect like terms

x = 16 - 50 + 41 +7

x = 14

<em>Hence, 14 students did both</em>

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Find the slope of the line containing the two points.<br><br> (2,5),(-3,-2)<br><br> Please show work
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9. Carla has $200 in her bank account.
Firdavs [7]

(a) Linear Equation:   f(x) = 200 - 20x

(b) x-intercept : (10,0)

(c) y-intercept : (0,200)

(d) Domain : {0,1,2,3,4,5,6,7,8,9,10}

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Every week $20 is getting deducted from the total amount of $200.

Step 2: (a) So we can quote it in equation as,

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