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Alex777 [14]
3 years ago
9

What would be the first step according to our order of operations?

Mathematics
1 answer:
poizon [28]3 years ago
5 0

Answer:

C

Step-by-step explanation:

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Erica can paint her room 5 hours .If she had her friend Rachel help her , they can paint the room together in 3 hours .How long
LUCKY_DIMON [66]

Answer:

7 hours 30min

Step-by-step explanation:

Step one :

Given data

We are told that Erica can paint 1 room in 5hours

Her work rate is 1/5 room per hour

And also with the assistance of her friend they can paint 1 room in 3 hours

Hence their combined work rate is 1/3 room per hour

Step two

The combined work expression is

1/A+1/B=1/T

Where A=Erica's work rate

B=Rachael's work rate

T=combined work

1/5+1/B=1/3

1/B=1/3-1/5

1/B=5-3/15

1/B=2/15

B=15/2

B=7.5 hours

It will take Rachel 7 hours 30min to paint the room

4 0
3 years ago
Line k perpendicular to line m, and passes through the same point, (6,2). What is the equation
Papessa [141]

Answer:

y = mx + b

Step-by-step explanation:

Use that form to find the slope.

8 0
2 years ago
Which type of checking account requires a certain amount of money to be
lisabon 2012 [21]

Answer:

the answer is a

Step-by-step explanation:

minimum balance account

4 0
3 years ago
Read 2 more answers
Select the correct product.<br><br> (y + z)3
Gre4nikov [31]

Answer:

3y + 3z

Step-by-step explanation:

(y + z)3

As the parenthesis contains 2 different variables, we cannot add them

Distribute (Multiply 3 by y and z)

3y + 3z

This is the simplest that this expression can get

Hope this helps :)

7 0
3 years ago
Functions please helpp​
rodikova [14]

Answer:

<em>Functions:</em>

3. The chart with arrows

4. The graph

<em>Not Functions:</em>

1. (1,1), (2,2), (3,3), (1,4)

2. (1,17), (0,16), (0,15), (-2,17)

Step-by-step explanation:

Functions do not have repeating domains (x-coordinates).

Hope it helps!

8 0
3 years ago
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