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Rufina [12.5K]
4 years ago
13

Which statement about Eduardo’s calculations is true?

Mathematics
1 answer:
jeyben [28]4 years ago
3 0

Answer:

"Eduardo did not use the correct formula for the circumference"

Step-by-step explanation:

The circumference formula is  C = 2πr

Area formula is  A=πr^2

Volume formula is correct. The steps area also correct to find r, the radius.

But in the end, he put the formula for circumference wrong. He used the formula for Area, NOT Circumference.

Hence, "Eduardo did not use the correct formula for the circumference" should be the correct choice for this question.

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The size of angle aob is equal to 132 degrees and the size of angle cod is equal to 141 degrees. find the size of angle dob.
Varvara68 [4.7K]

angle AOB = 132 and is also the sum of angles AOD and DOB. Hence 
angle AOD + angle DOB = 132°    ---> 1 

angle COD = 141 and is also the sum of angles COB and BOD. Hence 
angle COB + angle DOB = 141°    ---> 2

Now we add the left sides together and the right sides of equations 1 and 2 together to form a new equation. 

angle AOD + angle DOB + angle COB + angle DOB = 132 + 141       ---> 3 

We should also note that: 
angle AOD + angle DOB + angle COB = 180° 

Therefore substituting angle AOD + angle DOB + angle COB in equation 3 by 180 and solving for angle DOB:
180 + angle DOB = 132 + 141 
angle DOB = 273 - 180 = 93° 

8 0
3 years ago
The description below represents Function A and the table represents Function B: Function A The function is 2 more than 5 times
Vlad [161]

Answer:

The slope of Function A is greater than the slope of function B  while the y-intercept of Function  B is greater than the y-intercept of function A.

Step-by-step explanation:

Function A is f(x) = 5x + 2

The slope is 5 and the y-intercept is (0, 2).

Function B. The slope is  (5-2) / (0- -1) = 3.

also (8-5) / (1 - 0) = 3

The slope is 3.

The y-intercept is at (0, 5) because one point on the graph is (0, 5).

7 0
3 years ago
Determine the rate of change of f , f(x)= 6x-5
vagabundo [1.1K]

Answer:

6

Step-by-step explanation:

the rate of change is given by the slope of the line

the equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y-intercept )

f(x) = 6x - 5 is in this form

with slope m = 6 ← rate of change



5 0
3 years ago
Read 2 more answers
How do I do this. I don’t understand how to put the numbers in that formula or whatever the heck it is.
OleMash [197]

Answer:

5

Step-by-step explanation:

8 0
3 years ago
-7 times 8 = 7 times (-8) true or false
12345 [234]

Answer:

Yaa it's true

Step-by-step explanation:

-56=-56

from both side u get the same answer

5 0
3 years ago
Read 2 more answers
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