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meriva
3 years ago
9

Given: circle k(O), diameter US, measure of arc RU=50, measure of arc UT=30

Mathematics
1 answer:
sleet_krkn [62]3 years ago
3 0

Answer:

angle RUS = 65 degrees

angle STU = 90 degrees

Step-by-step explanation:

(a) find angle RUS

Given arc RU = 50 degrees, so angle RSU = 50/2 = 25 degrees

Since US is the diameter,

angle URS is a right-angle.

Consider triangle RUS,

sum of angles of a triangle = 25+90+RUS = 180  

solve for

RUS = 180 - 25 - 90 = 65 degrees.

(b) Find STU

All diameters span a right angle at the circumference,

since we're given US is a diameter, this means that

angle STU is a right angle.

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3 years ago
Find the value of y
Rainbow [258]
You'll apply the geometric mean formula. The idea is to multiply the two pieces of the hypotenuse: 5*11 = 55

Then apply the square root to get sqrt(55)

The exact answer in terms of radicals or square roots is sqrt(55)

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If your teacher wants you to use a proportion, then one way to do it is to have
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4 0
4 years ago
Fred Salmon purchased six $1,000 bonds at 92. The bonds pay 6.5%. What was the cost of the bonds? What was the total annual inte
Hunter-Best [27]
What is the cost of the bond?
When you see that a bond was purchased "at 92", this means that the bond was purchased for 92% of the face value. Sometimes the bond purchaser will pay more than the face value (purchased a number greater than 100), generally if the interest rate is higher than the market rate. 

The cost of one bond, then, is 92% of 1,000, or $920.
Since there are 6 bonds, the total cost is 920 x 6 = $5520

What is the total annual interest?
The annual interest is the interest rate on the bond times the face value (not the cost of the bond).
The interest rate is 6.5%, so the annual interest on one bond is:
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When we think of yield, we want to consider the real return on the bond. This is the annual interest earned divided by what the purchaser paid for it.
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4 0
3 years ago
Read 2 more answers
Brad buys a pack of 12 bottles of energy drink for £9.25
BARSIC [14]
Step One
Find the cost of one bottle
12 bottles cost 9.25 pounds.
1 bottle costs x

12 / 1 = 9.25/x    Cross multiply
12*x  = 1 * 9.25 Divide by 12
x = 9.25 / 12
x = 0.77

Remark
0.77 pounds sterling = 77 pennies

Step Two
find the profit on the sale of one bottle
100 - 77 = 23 pennies

Step Three
Find the % profit on one bottle.

% Profit = (profit on one bottle / Cost of 1 bottle.) * 100%
% Profit = (23 / 77) * 100 
% Profit = 29.87%   <<<<<<<< Answer.

 
8 0
3 years ago
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