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dangina [55]
3 years ago
7

Which set of lengths could not form a triangle?

Mathematics
2 answers:
Natalka [10]3 years ago
8 0
The fourth one, because 7+6=13, but it should be bigger than 15
Lubov Fominskaja [6]3 years ago
3 0
The set of lengths that could not form a triangle is 15,7,6
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Ramiro earns $20 per hour during the week and $30 per hour for overtime on the weekends. One week Ramiro earned a total of $650.
nika2105 [10]

Answer:

Week=25 Hours

Weekend= 5 Hours

Step-by-step explanation:

So we need to use the info they gave us and create two equations. Firstly we know how much he gets paid per hour during the week (x) and how much he gets paid on the weekend (y).

$20x+$30y=$650

We get this because we know the combined rates he is paid times the hours should add up to the amount he earned.

The next equation will be made off of the information that he worked 5 times as many hours during the week as on the weekend. This tells us that we will take the weekend hours (y) and multiply them by 5 in order to get the week hours (x).

x=5y      Now, since we have one variable by itself, we can plug it in for x in the first equation.

20(5y)+30y=650    Our first step here is to distribute the 20 to the 5y in order to eliminate the parenthesis.

100y+30y=650    Next add the like terms together (100y+30y).

Now all we have to do to find y is divide by 130 on both sides to get y alone.

130y=650  

________

130     130

y=5             Now to solve for x we just plug our y value into one of the equations above. I'm going to use the second equation.

x=5(5)

x=25      

3 0
3 years ago
Factor completely. x2+7x−18 Enter your answer in the box.<br> 50 POINTS
Aliun [14]
The first step to solving this is to write 7x as a difference
x² + 9x - 2x - 18
next you need to factor out x from the expression
x × (x + 9) - 2x - 18
then you'll need to factor out -2 from the expression
x × (x + 9) - 2 (x + 9)
lastly,, you need to factor out x + 9 from the expression
(x + 9) × (x - 2)
this means that the correct answer to your question is (x + 9) × (x - 2).
let me know if you have any further questions
:)
4 0
3 years ago
Read 2 more answers
Greatest common factor for:
Ghella [55]
<u>         30a²        </u>    <u>           42a³         </u>   <u>                54a³b              </u>
2 · 3 · 5 ·× a · a<u />    2 · 3 · 7 · a · a · a    2 · 3 · 3 · 3 · a · a · a · b   

GCF = 2 · 3 · a · a
GCF = 6a²             <u />
7 0
3 years ago
How would I know what similarity it is?
muminat

Answer:

I can't see the ques

Step-by-step explanation:

Can u please post it again

8 0
3 years ago
How do I solve n+6 for n=9
kogti [31]

Answer:

15

Step-by-step explanation:

n + 6

for

n = 9

then:

9 + 6 = 15

3 0
4 years ago
Read 2 more answers
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