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RUDIKE [14]
3 years ago
6

Please help. Thanks!

Mathematics
1 answer:
Naddik [55]3 years ago
8 0

Answer:

84.9%

Step-by-step explanation:

First we need to calculate the total number of people. Total number of people will be the sum of all the given frequencies of all classes. There are 9 classes in total that are shown on the histogram

So,

Total number of people = 40 + 40 + 35 + 35 + 25 + 25 + 25 + 25 + 15 = 265

Now we need the number of people who took less than 40 seconds. This will be equal to sum of all frequencies below the time 40 seconds. i.e.

Number of people who took less than 40 seconds = 40 + 40 + 35 + 35 + 25 + 25 + 25 = 225

Formula to calculate percentage is:

Percentage = \frac{\text{Desired Part}}{\text{Total}} \times 100\%

So, percentage of people who took less than 40 seconds = \frac{225}{265} \times 100\% = 84.9\%

Thus, 84.9% of people took less than 40 seconds to complete the task.

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Name
tankabanditka [31]

Answer:

1. ¹⁰/₁₂ and ⅚;

2. ⁸/₁₂ and ⁴/₆;

3. ⁶/₁₂ and ³/₆

Step-by-step explanation:

The question is asking what fractions of 12 are equivalent to fractions of some smaller number.

Derek cut his pizza into 12 slices. Let's say that Ryan cut his into 6 slices.

Scheme 1

Derek eats 10 slices, and Ryan eats 5 (Fig A )

Then Derek has eaten ¹⁰/₁₂ = ⅚ of a pizza and Ryan has eaten ⅚ of a pizza.

They each have ⅙ of a pizza left over.

The fractions here are ¹⁰/₁₂ and ⅚.

Scheme 2

Derek eats 8 slices, and Ryan eats 4 (Fig. B)

Then Derek has eaten ⁸/₁₂ = ⅔ of a pizza and Ryan has eaten ⁴/₆ = ⅔ of a pizza.

They each have ⅓ of a pizza left over.

The fractions here are ⁸/₁₂ and ⁴/₆.

Scheme 3

Derek eats 6 slices, and Ryan eats 3 (Fig. C)

Then Derek has eaten ⁶/₁₂ = ½ of a pizza and Ryan has eaten ³/₆ = ½ of a pizza.

They each have ½ of a pizza left over.

The fractions here are ⁶/₁₂ and ³/₆.

7 0
3 years ago
3 increased by the product of 4 and a number is equal to the same number decreased by 6. What is the number
nasty-shy [4]

Answer:

1

Step-by-step explanation:


8 0
3 years ago
William says to Gracie, "If you give me $7.50,we will have and equal amount of money. "Grace responds, "That may be true, but if
Ede4ka [16]

Answer:

The amount that William has at the beginning is $37.50 and the amount that Gracie has at the beginning is $52.50

Step-by-step explanation:

Let

x ---> amount that William has at the beginning

y ---> amount that Gracie has at the beginning

we know that

William says to Gracie, "If you give me $7.50,we will have and equal amount of money

so

x+7.50=y-7.50

y=x+15.00 ----> equation A

"Grace responds, if you give me $ 7.50 instead, I will have twice as much money as you

2(x-7.50)=(y+7.50)

2x-15.00=y+7.50

2x-y=22.50 ----> equation B

substitute equation A in equation B

2x-(x+15.00)=22.50

solve for x

x=22.50+15.00=37.50

Find the value of y

y=37.50+15.00=52.50

therefore

The amount that William has at the beginning is $37.50 and the amount that Gracie has at the beginning is $52.50

5 0
4 years ago
What is the missing constant term in the perfect square that starts with x^2+6x ?
Olegator [25]
X^2 + 6x + 9
x                3
x                3

(x+3) (x+3)

x^2 + 3x + 3x + 9         (FOIL method)
x^2 + 6x + 9 (true)

your answer is 9 as the constant

hope this helps
8 0
4 years ago
Read 2 more answers
Help!<br> factor as the product of biomionals <br>64-16x+x^2​
ruslelena [56]

Answer:

(x-8)(x-8) are the factors of the following biominals

7 0
3 years ago
Read 2 more answers
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