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Aleksandr-060686 [28]
3 years ago
6

Determine the measure of angle ECB.

Mathematics
2 answers:
anygoal [31]3 years ago
5 0

Answer:

You are correct 91.75 is the answer

Step-by-step explanation:

This is a cyclic quadralterial since all the. vertices of the quadralterials touch the circle circumference. Opposite angles are supplementary in cyclic quadralterials. Angle C and Angle D are opposite angles so

7x + 20 + 9x - 4 = 180

16x + 16 = 180

16x = 164

x = 10 \frac{4}{16}

x = 10.25

Plug 10.25 into 7x+20

7(10.25) + 20 = 91.75

You are correct

Novosadov [1.4K]3 years ago
3 0

Answer:

4) 91.75

Step-by-step explanation:

7x+20+9x-4=180

16x=164

x=10.25

7(10.25)+20=

71.75+20=91.75

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5 0
3 years ago
Write each rate as a fraction in lowest terms 30 feet in 5 seconds
ruslelena [56]

Answer:

30 feet/5 seconds = 6 feet/1 second. hope this helps

Step-by-step explanation:

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7 0
2 years ago
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Find the area of a circle that has a diameter of 11 inches. Approximate r as 3.14. Round your answer to the nearest
mylen [45]

Answer:

94.985in^2

Step-by-step explanation:

Given data

Diameter= 11inches

Radius = 5.5 in i.e 11/2= 5.5inches

The  Area of a circle is given as

Area= πr^2

Substitute

Area= 3.14*5.5^2

Area= 3.14*30.25

Area= 94.985 in^2

Hence the area is 94.985in^2

5 0
3 years ago
Which ordered pair is a solution of the equation? y = 7 x − 3 y=7x−3
eimsori [14]

Answer:

(1,4)

Step-by-step explanation:

Which ordered pair is a solution of the equation? y = 7 x − 3

a. (1,4) b. (-1,-4) c. both d. neither

Solution

y=7x-3

Solve by trying each ordered pair

a. (1,4)

x=1, y=4

Substituting the value of x and y into the equation

y=7x-3

4=7(1)-3

4=7-3

4=4

This is a true statement

b. (-1,-4)

x=-1, y=-4

Substitute the value into the equation

y=7x-3

-4=7(-1)-3

-4= -7-3

-4= -11

This is not a true statement

This true statement is when x=1 and y=4

So, the ordered pair (1, 4) is the solution

8 0
3 years ago
The product of two numbers is -30, but their sum is -13. What are these two numbers?
Nata [24]
<h3>Answer:  -15 and 2</h3>

You find this through trial and error.

A much more efficient way is to solve x^2-13x-30 = 0 using the quadratic formula. You'll find the two solutions to be x = 15 and x = -2

Going from those solutions, we get x-15 = 0 and x+2 = 0 which then turn into (x-15)(x+2) = 0 through the zero product property.

3 0
3 years ago
Read 2 more answers
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