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brilliants [131]
3 years ago
7

Measure the angle of 10x+10

Mathematics
1 answer:
Elena L [17]3 years ago
7 0

Answer:

We know that opposite angle are congruent.

10x + 10 = 11x + 3 \\  \\ 10x - 11x =  - 7 \\  - x =  - 7 \\ x = 7

So, We found out that x = 7,

So, Putting x = 7 in 10x+10

10 \times 7 + 10 \\  \\  = 70 + 10 \\  \\  = 80

So, The measure of angle 10x+10 is 80.

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Sindrei [870]

Answer:

Option B. is correct

Step-by-step explanation:

Let x denotes time taken by Mia alone to clean the room and y denotes time taken by Holly alone to clean the room.

As Mia and Holly can clean their room in 20 min, working together,

\frac{1}{x}+\frac{1}{y} =\frac{1}{20}\,\,\,...(i)      

Also,

Mia, working alone, can do the job in 30 min.

So,

\frac{1}{x}=\frac{1}{30}\,\,\,\,\,...(ii)

Put (ii) in (i)

\frac{1}{30}+\frac{1}{y}=\frac{1}{20}\\\frac{1}{y}=\frac{1}{20}-\frac{1}{30}\\\frac{1}{y}=\frac{3-2}{60} \\\frac{1}{y}=\frac{1}{60}

Therefore,

Holly can clean the room alone in 60 minutes.

Option B. is correct

4 0
3 years ago
Y=-1,X+2y=-6 solve by substitution show all work
aev [14]

Answer:

x=-4

Step-by-step explanation:

x+2y=-6

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_________

x+2\left(-1\right)=-6

x-2\times \:1=-6

Multiply: 2*1= 2

x-2=-6

Add 2 to both sides:

x-2+2=-6+2

x=-4

________________

* Hope it helps

* Have a good day!

________________

5 0
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Step-by-step explanation:

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Step-by-step explanation:

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