MATHEMATICS COLLEGE

QUESTIONS 1,2,3 PLSSSS (PICTURE ATTACHED) :)

Answers

Answer 1

Answer:

Answer:

A) 20/6

B)21/16

C)21/10 or 2.1

Step-by-step explanation:

EDIT!: someone else who probably has a better understanding than me answered this and I've been doing this all wrong lol please ignore this .w.

to find any probability just find the total and then divide that by the number of whatever you're checking for, eg. parkour backgrounds.

7+3+4+6 = 20 total backgrounds

6 parkour backgrounds.

20/6 is your answer.

6 + 10 + 5 = 21 total marbles

10 + 6 = 16 non yellow marbles

21/16 is your answer.

6 + 10 + 5 = 21 total marbles

10 blue marbles

21/10 or 2.1 is your answer.

Answer 2

Answer: I don’t really understand the first question, but the second should be 76.1% and the third should be 47.6%. Comment if you want me to explain it, i would really appreciate it if you marked me brainliest

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Find the discounted price:$40 jacket; 33% discount

At the start of the day there was 129.75 in the till one hour later there is 145.40 how much did the shop take in a hour

Answers

At the start of the day, there was £129.75. Later, they made more money, so the £145.50. To find the amount of change, you just need to deduct the number 129.75 from 145.50.

145.50 - 129.75 = 15.75

The shop made £15.75 in one hour.

Write two fractions whose quotient is 28/45?

Answers

Answer:

(7/9) ÷ (5/4) = 28/45

Step-by-step explanation:

Fractions can be divided by using the rule "invert and multiply". We can look at the factors of 28 and 45 to see what might have been multiplied to get these numbers.

28 = 1·28 = 2·14 = 4·7

45 = 1·45 = 3·15 = 5·9

So, there are a number of possibilities. A couple of them are ...

28/45 = (7/9) × (4/5) = (4/9) × (7/5)

If we choose to use the first of these pairs of fractions, we can invert one of the fractions to make the denominator, then write the quotient as either of ...

(7/9) ÷ (5/4)

(4/5) ÷ (9/7)

X²+4x+20=0a=1 b=20 c=4
a=1 b=4 c=-20
a=1 b =4 c = 20
a=1 b=-4 c=0

2x²+6x+5=0

-2x²+x+5 identify the coefficients

Answers

Step-by-step explanation:

The general form of the quadratic equation is :

$ax^2+bx+c$

The given equation is x²+4x+20=0

On comparing the given equation and the general equation, we find that

a = 1, b = 4 and c = 20

Hence, the correct option is a=1 b =4 c = 20.

If the equation is 2x²+6x+5=0, then

a = 2, b = 6 and c = 5

If the equation is -2x²+x+5

a = -2, b = 1 and c = 5

Suppose a professor splits their class into two groups: students whose last names begin with A-K and students whose last names begin with L-Z. If p1 and p2 represent the proportion of students who have an iPhone by last name, would you be surprised if p1 did not exactly equal p2? If we conclude that the first initial of a student's last name is NOT related to whether the person owns an iPhone, what assumption are we making about the relationship between these two variables?

Answers

a) Even if the distribution of iPhones by last name is completely uniform in the population generally, there is no reason to believe that the proportions in the sample represented by the class will be identical.
I would not be surprised to see p1 ≠ p2.

b) Saying the variables are not related is the same as saying the variables are independent.

$(x)/(2) + 10 = * - 3$ The answer is 26, but I dont know how to solve it

Answers

First of all move all the Xs to the left side, and the numbers to the left.
So
x/2-x = -13
Which means
X/2-x/1 = -13
Which means x/2-2x/2 = -13
So u combine to two fractions
-x/2 = -13
-x = -13 * 2
Which means x = 26 (u flip the negativity)

Nine yards of ribbon are cut into 8 equal pieces what is the length of each piece of ribbon. Write a division expression to represent the problem and solve