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sweet-ann [11.9K]
3 years ago
11

Somebody please help me: Evaluate the expression for x = -1/4

Mathematics
1 answer:
Dahasolnce [82]3 years ago
4 0

Answer:

There are no expressions provided in the question.

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If <ABC measures 100 and is inscribed in a circle O. find <BAO and <BCO​
satela [25.4K]

Answer:

<BCO​ = <BAO​ = 20degrees

Step-by-step explanation:

If <ABC measures 100 and is inscribed in a circle O. find <BAO and <BCO​

To get <BAO and <BCO​, we need to get <AOC first.

From the figure, it can be seen that triangle ABC is an isosceles trinagle. Hence;

<BAC + <BCA + 100 = 180

Since <BAC = <BCA

<BAC + <BAC = 180 - 100

2<BAC = 80

<BAC = 80/2

<BAC = 40

Also;

<BAO = <BCO​ and <BAO = <BAC/2

<BAO = 40/2 = <BCO​

Hence <BCO​ = <BAO​ = 20degrees

3 0
3 years ago
What is y - 3y please ​
tatyana61 [14]

Answer:

<u>=-2y</u>

Step-by-step explanation:

y-3y

<u>=-2y</u>

5 0
3 years ago
One fifth of a number plus five times that number is equal to seven times the number less 18. find the number.
Schach [20]
OK.  First we have to figure out names for all the numbers you mentioned.

The mysterious number . . . . . call it Q
One fifth of the number . . . . . 0.2 Q
Five times the number . . . . . . 5 Q
Seven times the number . . . . 7 Q

(One fifth plus five times the number) . . . 5.2 Q
(Seven times the number less 18) . . . . . . 7 Q - 18

You said that these last two things are equal, 

so I can write . . . . . . . . . . . . . . . . . .  7 Q - 18  =  5.2 Q

Now, subtract  7Q  from each side . . .  -18 = -1.8 Q

Divide each side by  -1.8 . . . . . . . . . .  10 = Q 
6 0
3 years ago
Explain why a + 2b = 110 in the triangle shown​
Luda [366]

Answer:

Step-by-step explanation:

According to the Triangle Angle-Sum Theorem, all the angles of a triangle have to add up to equal 180 degrees. For us, in our triangle:

a + 2b + 70 = 180 so

a + 2b = 180 -70 and

a + 2b = 110. That's why.

3 0
3 years ago
Ivan has just opened a small coffee shop. He paid a copy store $0.10 per copy to make 1,428 copies of the flyer to announce the
joja [24]
Each friend gets $25.50 for only distributing the flyers but, they all have $10.20 worth of copies printed each so, if you want to find out the total amount of money he is really wasting on one friend including the copy money it is $35.70
3 0
3 years ago
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