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Zina [86]
3 years ago
9

Quadrilateral Q O B C is inscribed within circle O. Sides A C and C B are congruent. Arc A B is 220 degrees. What is the measure

of angle OAC if major arc AB measures 220 degrees?
55°
70°
110°
140°

The answer is 55, But can someone explained to me
Mathematics
1 answer:
saul85 [17]3 years ago
4 0

Answer:

A 55

Step-by-step explanation:

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*REVERSE PROPORTION*
muminat

9514 1404 393

Answer:

  33.3%

Step-by-step explanation:

The selling price of £42 is (1 +40%) times the total purchase price.

  1.40 × purchase price = £42

  purchase price = £42/1.40 = £30

The total profit is 40% of this, so is ...

  £30 × 40% = £12

The purchase price of the skirt is ...

  total cost - glove cost = skirt cost = £30 -3 = £27

The profit on the skirt is ...

  total profit - glove profit = skirt profit = £12 -100% × £3 = £9

Then the percentage profit on the skirt is ...

  skirt profit % = skirt profit / skirt cost × 100% = £9/£27 × 100% = 33.3%

The percentage profit on the cost of the skirt was 33.3%.

5 0
3 years ago
Add, using the rule for order of operations if necessary:<br> 15+ [2 + (-4)] + (−9)?
schepotkina [342]

15 + ( - 2) +  - 9 = 13 - 9 = 4

#Goodluck!

8 0
1 year ago
the radius of a cylindrical water tank is 6.5ft, and its height is 16ft what is the volume of the tank?​
dimulka [17.4K]

Answer:

Volume of cylindrical tank is 2122.64 cubed feet.

Step-by-step explanation:

It is given that:

Radius of cylindrical tank = 6.5 feet

Height of tank = 16 feet

Volume of tank = πr²h

Putting the values in the formula

Volume = 3.24 * (6.5)² * 16

Volume = 3.14 * 42.45 * 16

Volume = 2122.64 cubed feet.

Therefore,

Volume of cylindrical tank is 2122.64 cubed feet.

4 0
3 years ago
A school survey says that 75% or 294 of the 8th graders have cell phones how many 8th graders are there?
mezya [45]

Answer:

75

____ x 294 = 220.5 around 221 students.

100

The keyword of means multiplication.

Consider a percent out of 100.

A way to remember is that: "cent" means 100.

3 0
3 years ago
Read 2 more answers
Use the discriminant to describe the roots of each equation. Then select the best description. 2x2 + 7x + 6 = 0 double root real
arlik [135]

So the equation to find the discriminant is √(b^2 - 4ac), with a = x^2 coefficient, b = x coefficient, and c = constant. Using our equation above, we can solve for it as such:

\sqrt{7^2-4*2*6}\\ \sqrt{49-48}\\ \sqrt{1}\\ 1

Since the discriminant is greater than zero and a perfect square, this means that there are 2 real, rational solutions to this polynomial.

6 0
3 years ago
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