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2 years ago

Easy questions just a bit of help no rush 100 points to do this

Mathematics

1 answer:

Inessa05 [86]2 years ago

6 0

Is this a test or do you need help

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Can someone please help……

Arada [10]

Answer:

first option

Step-by-step explanation:

I don't know how to explain

3 0

3 years ago

I need help o this problem

drek231 [11]

A If im not mistaken but that is what i would go with

8 0

3 years ago

150 students were surveyed on how many text messages to send in a date for different devices. let X represent the number of stud

kakasveta [241]

Given that the total number of students that sent messages = 150 students

a) To obtain the equation to represent the number of students who send text messages, we will sum up the variables in the Venn diagram and equate it to 150.

$\begin{gathered} 75+x+3x+x=150 \\ x+3x+x=150-75 \\ 5x=75 \end{gathered}$

Hence, the equation is

$5x=75$

b) Solving for x

$\begin{gathered} 5x=75 \\ x=\frac{75}{5}=15 \\ \therefore x=15 \end{gathered}$

Therefore, x = 15.

c) The total number of student that uses cell phone = 75 + x = 75 + 15= 90students

The total number of students that sent messages = 150students

The formula for probability is,

$\text{Probability = }\frac{\text{Number of students that uses cell phone}}{\text{Total number of students}}$

Hence,

$P(\text{Number of students that uses cell phone)}=\frac{90}{150}=\frac{3}{5}$

Therefore, the probability that a randomly chosen student uses their cell phone to send text messages is 3/5.

7 0

1 year ago

2. Suppose you pay $21 for a pair of shoes that was originally $30. What was the percent of decrease in price for the shoes? Set

boyakko [2]

30$ originally - 21$ paid = 9$ discount

> divide the discount by the original price, multiply by 100 to get the percent decrease.

100 x (9$ / 30$) = 30% discount
> So the shoes where on sale for 30% off the original price.

for the equation:
100 x (30-21)/30 = % decrease

8 0

3 years ago

1 with the fraction of 9/40 percentage

zhenek [66]

Divide 9/40 will give you 0.225
Multiply it by 100
= 0.225 x 100 = 22.5%

4 0

3 years ago