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Mrac [35]
2 years ago
12

I need help I don’t know how to do this

Mathematics
1 answer:
IgorLugansk [536]2 years ago
7 0

Answer:

PL and LM

Step-by-step explanation:

The definition of perpendicular is two lines that create a 90 degree angle. There are a lot of those in a rectangular prism. One of them is PL and LM, because they intersect to create a right angle.

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Rachel has 60 scones. She sells them to Robbie, Cameron, Louis, Tom and
Nutka1998 [239]
We can start by writing all that we know about the problem. Let us write down how many scones each boy has:
R_{o} : x
C_{a} : x+k
L_{o} : x+2k
T_{o} : x+3k
C_{h} : x+4k
Note that k is the increase, we know it's a constant. This is not a system of equations, please keep that in mind. We will use rest of the information given to build the system. We have two variables x (the number of cookies the first boy bought) and k( the increase), that means we need to have two equations to solve this problem. 
We know that total amount of scones is 60, so we can use that information to build our first equation. We sum all of the scones and we get 60. 
R_{o}+C_{a}+L_{o}+T_{o}+C_{h}=60
5x+10k=60
We know that Robbie and Cameron combined have 3/7 of <span>Louis, Tom and Charlie combined. We can use this information to build our second equation.
</span>R_o+C_a= \frac{3}{7} (L_o+T_o+C_h)
2x+k= \frac{3}{7} (x+2k+x+3k+x+4k)
2x+k= \frac{3}{7} (3x+9k)
14x+7k=9x+27k
5x=20k
x=4k
Now this piece of information alows us to solve the first equation that we made and this will solve our problem. We simply plug in x=4k into 5x+10k=60.
5(4k)+10k=60
30k=60
k=2
Now we can plug this information into the same equation 5x+10k=60 and get x.
5x+10(2)=60
5x=40
x=8
And that's it. Now we can write out how many cookies each boy has bought.
R_{o} : x=8
C_{a} : x+k=10
L_{o} : x+2k=12
T_{o} : x+3k=14
C_{h} : x+4k=16
If you add them all up you get 60.
3 0
3 years ago
19.1 rounded to nearest 10
mixer [17]
First, you have to round the .1, which would be .0. Next, you round 19.0, or just 19, to the nearest 10, which is 20. Therefore, 19.1 rounded to the nearest 10 is 20.
6 0
4 years ago
Read 2 more answers
А Suav is a waiter at a restaurant. Each day he works , Suav will make a guaranteed wage of $35 however the additional amount th
galina1969 [7]

$ 105

Suave gets $ 35 a day, but he realized he got $ 7 for every table he waited for.

= $ 35/7

= 5 .... He waited for 5 tables

which gets $ 7 for any table worth it

= 15 tables × $ 7

= $ 105

6 0
3 years ago
You are planning a movie marathon. Each movie lasts 3/2 hours. You want to watch 4 movies nonstop. How many hours will your movi
Citrus2011 [14]

Answer:

Your movie marathon will last 6 hours.

Step-by-step explanation:

This question can be solved using a rule of three.

Each movie lasts \frac{3}{2} = 1.5 hours. How much do 4 movies last?

So

1 movie - 1.5 hours

4 movies - x hours

x = 4*1.5 = 6

Your movie marathon will last 6 hours.

5 0
3 years ago
The state sales tax on clothing is 5.5%. What is the cost of a $25 shirt,
kodGreya [7K]
26.38

5.5%=.055

.055x25=1.375(1.38)

25+1.38=26.38
6 0
3 years ago
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