All categories

3 years ago

I have a math problem that is stumping me and other people. Do you always multiple before dividing or do you work left to right?

1 answer:

swat323 years ago

6 0

It is customary to work left to right, however that is not a rule. In order of operations, the actual rule is that multiplication/division occurs after parentheses, exponents, and before addition/subtraction...

PEMDAS order of operations

Parentheses, exponents, mutiplication/division, addition/subtraction.

You might be interested in

A collector bought a rare coin for $30. The coin is now valued at $37.50. What is the percent increase in value?

AlladinOne [14]

Answer:

Step-by-step explanation:

5 0

3 years ago

This robotic arm is made up of two cylinders with equal volume and two triangular prism hands. The volume of each hand is

BaLLatris [955]

Answer:

$\frac{r}{3\pi h+r}$

Step-by-step explanation:

Since the height isn't given, we assume it to be "h" (of cylinders). And the answer will be in terms of "r" and "h".

The area of 1 arm is given, so the area of 2 arms would be:

$A_{arm}=2*(\frac{1}{2}r*\frac{1}{3}r*2r)=\frac{2r^3}{3}$

Now, area of 2 cylinders would be the formula:

$A_{cyl}=2*(\pi r^2 h)=2\pi r^2 h$

So, total area is A_arm PLUS A_cyl. The fractional area the arms are would be gotten by taking expression A_arm divided by A_total.

Shown below:

$\frac{A_{arm}}{A_{total}}=\frac{\frac{2r^3}{3}}{2\pi r^2 h + \frac{2r^3}{3}}$

We simplify further:

$\frac{\frac{2r^3}{3}}{2\pi r^2 h + \frac{2r^3}{3}}\\=\frac{\frac{2r^3}{3}}{2r^2(\pi h + \frac{r}{3})}\\=\frac{r}{3(\pi h + \frac{r}{3})}\\=\frac{r}{3\pi h+r}$

THis is the answer.

6 0

3 years ago

Read 2 more answers

Please help i don't understand!

vaieri [72.5K]

Answer: 9. x=-3/2 10. x=2

x= 5/2 x=5/3

Step-by-step explanation:

9. Factor the equation:

How: put 4x^2 in the bottom left box and -15 in the upper right box.

then multiply 4x^2 x -15 = -60x^2 and put your answer in the top center box of the diamond.

Put the -4x from the equation in the bottom box. Then list out factors that multiply to the top box (-60x^2) and add to the bottom box (-4x) The two factors are -10 and 6

-10 x 6 = -60

-10 + 6 = -4

Put -12x and -5x in the remaining white boxes and find what numbers multiply to each.

I attached a picture. The colored dots correspond with each other.

Eg: Orange dot x orange dot = number in white square

Now you get the two factors (2x+3)(2x-5)

Set both of these equal to 0 and solve

0=2x+3 0=2x-5

x= -3/2 x= 5/2

Do the same for the other problem

7 0

2 years ago

The coordinates of the vertices of △JKL are J(1, 4) , K(6, 4) , and L(1, 1) .

gayaneshka [121]

Translation 1 unit left and rotation of 90 degrees counterclockwise

5 0

3 years ago

Read 2 more answers

What’s the answer 4±√10

valina [46]

Answer:

Step-by-step explanation:

1 because it 1 and I know it one I need help 1

3 0

3 years ago