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abruzzese [7]
2 years ago
5

Helppppppppppppppppppppppppppppppppp!!!!!!!!!!!!!!

Mathematics
1 answer:
allsm [11]2 years ago
5 0
∠DOC is the average of the given angle values,
  (170° +44°)/2 = 107°

∠DOB is the supplement to that,
  180° -107° = 73°

The appropriate choice is
  B)   73°
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What is the greatest common factor of 3a^2+30a
Lisa [10]

Answer:

3

Step-by-step explanation:

3 is a prime number so other than 3x1 3 does not have any other factors

6 0
3 years ago
Uma wants to buy a video game system for $270. She has $60 and is saving $30 each week. Solve the equation 30w + 60 = 270 to fin
vlabodo [156]
30(7) + 60 = 270 

Thank you :)
4 0
3 years ago
One positive number is 14 less than another positive number. If the reciprocal of the smaller number is added to five times the
Kipish [7]

Let's call the two numbers s and l.


Given these variables, we can say: s = l - 14, based on the first sentence in the problem.


Also, remember that the reciprocal of a number is simply 1 divided by the number. Thus, we can say that:

\dfrac{1}{s} + 5\Big( \dfrac{1}{l} \Big) = \dfrac{1}{4}


To solve, we can simply substitute l -14 in for s in the second equation and solve.

\dfrac{1}{l - 14} + \dfrac{5}{l} = \dfrac{1}{4}

  • Set up

\dfrac{l}{l(l - 14)} + \dfrac{5(l - 14)}{l(l - 14)} = \dfrac{1}{4}

  • Get terms on the left side to a common denominator for easier addition

\dfrac{l + 5l - 70}{l(l - 14)} = \dfrac{1}{4}

  • Simplify

4(6l - 70) = l(l - 14)

  • Cross multiplication (\frac{a}{b} = \frac{c}{d} \Rightarrow ad = bc)

24l - 280 = l^2 - 14l

  • Simplify

l^2 - 38l + 280 = 0

  • Subtract 24l - 280 from both sides of the equation

(l - 10)(l - 28) = 0

  • Factor left side of the equation

l = 10, 28

  • Zero Product Property

Now, notice that we have found two solutions, but the problem is only asking for one. This <em>likely </em>means that one of our solutions is extraneous. Let's take a look. Remember that the smaller positive number is equal to 14 less than the larger number. However,

s = 10 - 14 = -4,

Since s is not positive in this case, l = 10 is not a solution.


Thus, l = 28 is our only solution. In this case,

s = 28 - 14 = 14,

which means that the smaller number is 14 and the larger number is 28.

5 0
3 years ago
The diameter of a circle is 12 mm. what is its radius?
MrMuchimi

Answer:

6mm

Step-by-step explanation:

radius = 1/2 of diameter

5 0
3 years ago
Read 2 more answers
Can someone plz help me I don’t understand how to do this and I am really struggling with the online stuff
sweet [91]

Answer:

A

Step-by-step explanation:

x=6.28111...

100 x=628.111...

1000x=6281.111...

subtract

900x=5653

x=5653/900

density of iodine=785×5653/900≈4930.672222...

Here 2 is repeating .

3 0
2 years ago
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