MATHEMATICS HIGH SCHOOL

Please help me with this question, as soon as possible.

Answers

Answer 1

Answer:

Answer:

B y is 3/4 of (x+y)

Step-by-step explanation:

a : is the same thing as a division sign or a fraction bar

so 1 : 3 = 1/3

this ratio says that for every 1 of x, there are 3 y's.

so 1x = 3y or y = 1/3x

x = 1; y = 3

x + y = 4

y / (x+y)

3 / 4

y is 3/4 of (x+y)

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What is the sum of 2/5 and 2/4

Answers

Okay you want to find the common factor right? So then 2/5 fifth and 2/4 fourth have only 20 in common. So 2/5 times 4 is? 8/20 do not simplify so then 2/4 times five is 10/20 so then 8+10=18/20 simplify and you get 9/10.

Which counterexample disproves this statement?
for all integers x, 1/x less than or equal to x

Answers

One counter example would be -2. -1/2 is more than -2.

I don’t know this one

Answers

Answer:

3077.2

Step-by-step explanation:

A circle's mass is found by

Pie times R^2

7^2 is 49, times 3.14 is 153.86

then you Multiply 153.86 by 20 which gives you 3077.2

Volume of a cylinder = pi r^2 * h
Pi 7^2 * 20
Volume = 49 pi

Density = mass/ volume
2.5= mass/ 49 pi
Mass= density * volume
= 2.5*49 pi
= 245/2 pi
= 384.845...
=384.8 g to 1 dp

Answer= Volume

Find mAC.

Pls help me

Answers

Answer:

Measure of Arc AC is 30 degrees

Step-by-step explanation:

To find the value of the marked arc, we are going to use the arc-angle relationship

from the type of given diagram, we can figure out the relationship to use

Mathematically, we have this as;

Measure of Arc AC = 2 * angle ABC

So we have arc AC as 2 * 15

Arc AC = 30 degrees

Cost A=0.6489

take the inverse cosine of both sides

Answers

I am not quite sure what the question asks for,
But this is what i assume it wants:

Cos A= 0.6489
In this given one, we basically find the size of the angle A
we do cosine inverse on both sides to get the size of the angle A
$cos^(-1)$ : It looks like this in the calculator
$cos^(-1)$ × cos A= $cos^(-1)$ (0.6489)
( $cos^(-1)$ and cos cancels out)
A= $cos^(-1)$ (0.6489)
A=49.54°
check:
cos 49.54=0.6489 (its right!)

How do you solve 2/3=m/42

Answers

$(2)/(3) = (m)/(42) \n \n (2)/(3) * 42 = m \ / \ multiply \ each \ side \ by \ 42 \n \n (84)/(3) = m \ / \ simplify \n \n 28 = m \ / \ simplify \n \n m = 28 \ / \ change \ sides \n \n$

The final result is m = 28.

2/3 = m/42

m/42 = 2/3
*42 *42

2/3 * 42/1 = 84/3 = 28

m = 28

Answer: m = 28

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