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Strike441 [17]
3 years ago
14

The mean of three numbers is 70. if two of the numbers are 55 and 65 what is the third number

Mathematics
2 answers:
Margarita [4]3 years ago
6 0
90
55+65=120
there are 3 numbers and when you divide them it makes 70.
70 x 3 = 210
210 - 120 = 90
55 + 65 + 90 = 210
210 / 3 = 70
Evgesh-ka [11]3 years ago
4 0
I thin the third number would be 90 because if the mean of 3 numbers is 70 then multiply 70 an three and you get 210. Then add 55 and 65 and you get 120.Then do 210-120 and you get 90 so 90 is the third number.
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nlexa [21]

The measure of angle ∠ACB is 70°. Then the correct option is C.

<h3>What is the triangle?</h3>

A triangle is a three-sided polygon with three angles. The angles of the triangle add up to 180 degrees.

∠ABC + ∠BCA + ∠CAB = 180°

        60° + ∠BCA + 50° = 180°

                           ∠BCA = 180° – 110°

                           ∠BCA = 70°

Then the correct option is C.

The complete question is given below.

Use the diagram showing m || n, as well as the relationships between interior and exterior angles of ΔABC, to answer the questions.

The measure of ABC is 60

The measure of BAC is 50

The measure of ACB will be

a. 50

b. 60

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d. 120

More about the triangle link is given below.

brainly.com/question/25813512

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Marina CMI [18]

Answer:

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Step-by-step explanation:

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