What is the measure of 7a angle 3

Mathematics

1 answer:

dusya [7]3 years ago

6 0

Answer:cnbkdbvsdfbfkdbvobdflb;dkgbgjbogbsblgfbkogbopgbkg[gkbgjbog

Step-by-step explanation:

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Three numbers are in an arithmetic progression with a common difference of 6. if 4 is subtracted from the first number, 1 is sub

UkoKoshka [18]

Answer:

either of {-9.5, -3.5, 2.5} or {7, 13, 19}

Step-by-step explanation:

Let x represent the first number of the arithmetic sequence. Then the second number is x+6, and the third number is x+12. The geometric sequence is then ...

(x -4), (x +5), 3(x+9)

The common ratio is then ...

(x +5)/(x -4) = 3(x +9)/(x +5)

Cross-multiplying gives ...

(x +5)² = 3(x -4)(x +9)

x² +10x +25 = 3x² +15x -108 . . . . eliminate parentheses

0 = 2x² +5x -133 . . . . . . . . . . . . . . subtract the left side

0 = (2x +19)(x -7) . . . . . . . . . . . . . . factor

x = -9.5 . . or . . 7

The possible original three numbers are ...

{-9.5, -3.5, 2.5} . . or . . {7, 13, 19}

8 0

3 years ago

A school dance committee is made up of 2 freshman, 4 sophomores, 2 juniors, and 2 seniors.

qaws [65]

Answer:

4 and 6.

Step-by-step explanation:

There are 4 different grades represented, so for the first question, there are 4 ways that the students can sit if they must sit together by grade.

For the second question, there are 3 grades other than senior level, so it starts with 3 ways that the students can be seated. 3 ways x 2 students per way = 6 ways

7 0

3 years ago

To win a trivia game, Negan must score 90 points. Each correct answer is worth 1 3 over 4 points, and each incorrect answer is w

DedPeter [7]

Answer:

Nevan won the game.

He scored 183 points.

Explanation:

Correct answer is worth 13/4 points

Incorrect answer is worth -1/4 points.

Number of correct answers = 58

Number of incorrect answers = 22