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Leni [432]
3 years ago
10

NEED HELP ASAP 60 POINTS AND WILL MARK AS BRAINLIEST Alex, an eighth grader, and Eric, a seventh grader, need to determine who c

ame closer to their grade’s state record for the triple jump. Alex jumped 39.85 feet and Eric jumped 37 feet and "1" "1" /"4" inches. Who was closer to the state record if the eighth-grade record is 42.25 feet and the seventh-grade record is 39 feet 3 inches?
Mathematics
2 answers:
Helga [31]3 years ago
5 0
42.25-39.85=2.4
37+1 1/4= 38.25
39.25-38.25=1
Eric came closer. Hope this helps!
Lesechka [4]3 years ago
3 0

Answer:

Eric was closer to the state record.

Step-by-step explanation:

Consider the provided information.

Alex jumped 39.85 feet the eighth-grade record is 42.25 feet.

Let see how closer Alex jumped was.

42.25 -39.85=2.4

Eric, a seventh grader, and he jumped 37 feet and "1" "1" /"4" inches. The seventh-grade record is 39 feet 3 inches.

First convert 37 feet and "1" "1" /"4" inches into feet.

1\frac{1}{4}=\frac{5}{4}

1\ in=0.083\ foot

Multiply both sides by 5/4.

\frac{5}{4}\ in=0.104167\ foot

That means total distance was 37+0.104167=37.104167 feet.

seventh-grade record is 39 feet 3 inches.

3 in = 0.25 foot

Therefore, the seventh grade record is 39+0.25=39.25 feet

39.25-37.104167=2.145833

2.145833 is smaller than 2.4

Hence, Eric was closer to the state record.

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6 0
4 years ago
Can you solve 5a please greatly appreciated.
timurjin [86]
Part I)
 
The module of vector AB is given by:
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 Part (ii)
 The module of the EF vector is given by:
 lEFl = root ((5) ^ 2 + (e) ^ 2)
 We have to:
 lEFl = 3lABl
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 root ((5) ^ 2 + (e) ^ 2) = 3 * (5)
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3 0
3 years ago
Please help! Help Will Give 100 PTS
allochka39001 [22]

Answer:

  x = 23; not extraneous

Step-by-step explanation:

A solution is extraneous if it does not satisfy the original equation. Extraneous solutions can sometimes be introduced in the process of solving radical and rational function equations.

<h3>Solution</h3>

Squaring both sides of the given equation, we get ...

  √(3x +12) = 9

  3x +12 = 81 . . . . . . square both sides

  x +4 = 27 . . . . . . . divide by 3

  x = 23 . . . . . . . . . . subtract 4

<h3>Check</h3>

There is only one solution, and it satisfies the equation:

  √(3×23 +12) = √81 = 9

The solution x = 23 is not extraneous.

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Question 6 of 10
elena55 [62]

Answer:

Option C

Step-by-step explanation:

8 0
3 years ago
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Please help.
Mariulka [41]

Step-by-step explanation:

A rational number can be written as a ratio a/b, where a & b are integers & b \neq 0. Rational numbers are terminating or repeating. The radical sign means "the positive square root of."


Example:

√144 = "the square root of 144" but indicates the positive square root of 144, which is 12


Hope this helps!!! :)

5 0
4 years ago
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