All categories

3 years ago

A musical group sells hats at their concerts. After one concert, they sold 120 out

Mathematics

2 answers:

kirill [66]3 years ago

7 0

Answer:

60% of the white hats and 70% of the black hats.

A greater percentage of Black

hats were sold.

Step-by-step explanation:

MatroZZZ [7]3 years ago

7 0

Answer: The musical group sold 60%of the white hats and 70%of the black hats.

A greater percentage of black hats were sold.

Step-by-step explanation:

Hi, to answer this question we have to divide the number of hats sold by the number of total hats for each case.

Then, we have to multiply that result by 100, to obtain the result in percentage form.

Mathematically speaking:

White Hats: (120/200) x 100 =60% 
Black hats: (210/300) x 100= 70%

The musical group sold 60%of the white hats and 70%of the black hats.

A greater percentage of black hats were sold. (Since 70 > 60 )

Feel free to ask for more if needed or if you did not understand something.

You might be interested in

Which of the following is not true about a square?

Kisachek [45]

The first statement is false. A square DOES have 4 right angles.

8 0

3 years ago

Read 2 more answers

9.7q = 9.1q - 7.92 q =

AleksAgata [21]

Answer:

q = -13.2

Step-by-step explanation:

9.7q = 9.1q - 7.92

Subtract 9.1q from both sides.

0.6q = -7.92

Divide both sides by 0.6

q = -13.2

Double check your work.

9.7(-13.2) = 9.1(-13.2) - 7.92

-128.04 = -120.12 - 7.92

-128.04 = -128.04

5 0

3 years ago

Several mountain climbers move up a mountain

Dimas [21]

Answer:

2 5/8

Step-by-step explanation:

6 0

3 years ago

4. What value of x makes the inequality true? 3(2x - 1) - 11x S -3x + 5

NNADVOKAT [17]

Answer:

A. {x: x ≥ -4}

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Distributive Property

Equality Properties

Multiplication Property of Equality
Division Property of Equality
Addition Property of Equality
Subtraction Property of Equality

Algebra I

Terms/Coefficients
{Builder Set Notation}

Step-by-step explanation:

Step 1: Define

Identify

3(2x - 1) - 11x ≤ -3x + 5

Step 2: Solve for x

[Distributive Property Distribute 3: 6x - 3 - 11x ≤ -3x + 5
[Subtraction] Combine like terms: -5x - 3 ≤ -3x + 5
[Addition Property of Equality] Add 5x on both sides: -3 ≤ 2x + 5
[Subtraction Property of Equality] Subtract 5 on both sides: -8 ≤ 2x
[Division Property of Equality] Divide 2 on both sides: -4 ≤ x
Rewrite: x ≥ -4

6 0

2 years ago

In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed to 6977subjects randomly selec

kirza4 [7]

Answer:

Given :An Internet survey was e-mailed to 6977 subjects randomly selected from an online group involved with ears. There were 1337 surveys returned.

To Find : Use a 0.01 significance level to test the claim that the return rate is less than 20%.

Solution:

n = 6977

x = 1337

We will use one sample proportion test

$\widehat{p}=\frac{x}{n}$

$\widehat{p}=\frac{1334}{6977}$

$\widehat{p}=0.1911$

We are given that the claim is the return rate is less than 20%.

$H_0:p=0.2\\H_a:p$

Formula of test statistic = $\frac{\widehat{p}-p}{\sqrt{\frac{p(1-p)}{n}}}$

= $\frac{0.1911-0.2}{\sqrt{\frac{0.2(1-0.2)}{6977}}}$

= $−1.858$

Refer the z table

P(z<-1.85)=0.0332

Significance level = 0.01=α

Since p value > α

So, we accept the null hypothesis .

So,the claim that the return rate is less than 20% is false.

7 0

3 years ago