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frutty [35]
3 years ago
7

A survey of 100 people found that 35 people exercise in the morning, 45 people exercise in the afternoon, and 20 people exercise

at night. Tara claims that 35:55, 45:80, and 20:65 are possible ratios from this data. Jim claims that 35:100, 45:100, and 20:100 are possible ratios from this data. Who is correct? Explain.
Mathematics
2 answers:
yanalaym [24]3 years ago
8 0
Jim because the overall ratios have to be relatable
Sophie [7]3 years ago
4 0
Jim is correct because the ratios need to compare with the total amount of people surveyed. 55, 80, and 65 are numbers that don't fit in and don't tell the overall ratio. You can tell this by writing it as a fraction. 
Ex: 35:100 = 35/100. This literally means 35 out of 100 people exercise in the morning. 

Hope this helps! If you have any questions, just ask!
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What is the discount of a baseball hat that is $34 with a 28% discount?
algol13

Answer:

12 bucks

Step-by-step explanation:

6 0
3 years ago
Please help me with this math quiz.
Ulleksa [173]

Answer:

A=0.62

B=\frac{7}{9}

C=\frac{10}{9}

7 0
3 years ago
The Walt Whitman bridge is 2000 feet long. This is 600 feet longer than two fifths of the length of George Washington bridge. Wr
Minchanka [31]

Answer:

2000= 600+2/5x

Step-by-step explanation:

length = X Ft

(2/5)x+600=2000

multiple both sides by 5/2:

x + 1500= 5000

x= 3500 ft

3 0
3 years ago
If f(x) =x 2 + 10, what is f (-5)?
lisov135 [29]

Answer:

f(-5) = 35

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Order of Operations: BPEMDAS

<u>Algebra I</u>

  • Function Notation

Step-by-step explanation:

<u>Step 1: Define</u>

f(x) = x² + 10

f(-5) is x = -5

<u>Step 2: Evaluate</u>

  1. Substitute:                    f(-5) = (-5)² + 10
  2. Exponents:                   f(-5) = 25 + 10
  3. Add:                              f(-5) = 35
7 0
2 years ago
A person wants to create a vegetable garden and keeps the rabbits out by enclosing it with 100 feet of fencing. The area of the
alekssr [168]

Answer:

The garden can not have area of 700ft^2

Step-by-step explanation:

We are given equation for area as

A(w)=w\times (50-w)

where

w is the width (in feet) of the garden

now, we are given area =700 ft^2

so, we can set area =700

and then we can solve for w

w\times (50-w)=700

50w-w^2=700

-w^2+50w-700=0

now, we can use quadratic formula

ax^2+bx+c=0

w=\frac{-b\pm \sqrt{b^2-4ac}}{2a}

we can compare and find a,b, and c

a=-1 , b=50 , c=-700

now, we can plug values

w=\frac{-50\pm \sqrt{50^2-4\left(-1\right)\left(-700\right)}}{2\left(-1\right)}

w=25-5\sqrt{3}i,\:w=25+5\sqrt{3}i

We can see that values of w is not real

so, w does not exists when area =700

so, The garden can not have area of 700ft^2


4 0
3 years ago
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