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nadya68 [22]
2 years ago
6

7. Five swimmers entered a competition. Four of the swimmers had their turns. Their scores are 9.8, 9.75, 9.79 and 9.81 seconds

respectively. About what score should the fifth swimmer get in order to win the competition. Explain your answer.​
Mathematics
1 answer:
arsen [322]2 years ago
5 0

Answer:

We must order these decimals from least to greatest. Then we must determine how the least compares with the winning score.

9.80 -> 3

9.75 -> 1

9.79 -> 2

9.81 -> 4

The least decimal is 9.75. Now we must determine how 9.75 compare with the winning score.

The last swimmer must get a score less than 9.75 seconds in order to win.

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Logan bought 35 balloons six-sevenths of the balloons are purple, how many of the balloons are purple?
Crank

ANSWER

30\text{ balloons}

EXPLANATION

To find the number of balloons that are purple, we have to find six-sevenths of 35.

That is:

\begin{gathered} \frac{6}{7}*35 \\ 6*5 \\ 30\text{ balloons} \end{gathered}

That is the number of balloons that are purple.

8 0
1 year ago
What is the value of (f*g)(-5)<br> f(x)=2x+1 ; g(x)=x^2
nikitadnepr [17]
F(-5) = 2(-5) + 1 = -9
g(-5) = (-5)^2 = 25

(f*g)(-5) = -9(25) = -225
4 0
3 years ago
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DochEvi [55]

Answer:

2520 cm²

Step-by-step explanation:

9 cm x 8 cm x 5 cm x 7cm = 2520 cm²

8 0
3 years ago
Read 2 more answers
If three times a number added to 8 is divided by the number plus 7, the result is four thirds. Find the number.​
Marina86 [1]

9514 1404 393

Answer:

  4/5

Step-by-step explanation:

The wording is ambiguous, as it often is when math expressions are described in English. We assume you intend ...

  \dfrac{3n+8}{n+7}=\dfrac{4}{3}\\\\3(3n+8)=4(n+7)\qquad\text{multiply by $3(n+7)$}\\\\9n+24=4n+28\qquad\text{eliminate parentheses}\\\\5n=4\qquad\text{subtract $4n+24$}\\\\\boxed{n=\dfrac{4}{5}}\qquad\text{divide by 5}

The number is 4/5.

5 0
3 years ago
Please help!! <br> Find A
Triss [41]

Answer:

  (5/2)√13 ≈ 9.0139

Step-by-step explanation:

The longer hypotenuse is found using the Pythagorean theorem as ...

  \sqrt{8^2+12^2}=\sqrt{208}=4\sqrt{13}

The right triangles are AA similar, and vertical sides correspond. Their ratio, smaller/larger is 5/8. That means the hypotenuse of the smaller triangle, A, is 5/8 of the hypotenuse of the larger one.

  A=\dfrac{5}{8}\cdot 4\sqrt{13}= \dfrac{5\sqrt{13}}{2}

6 0
3 years ago
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