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2 years ago

Evaluate the expression: (-8/9) / (-2/3) * (-4 1/2)

Mathematics

1 answer:

navik [9.2K]2 years ago

7 0

Answer:

-6

Step-by-step explanation:

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Trina, James, and Michael are training for a 10-kilometer race. After 30 minutes of a training run, Michael lead the group, and

Llana [10]

Answer:

1/3

Step-by-step explanation:

1/2 James' fraction of Michael

2/3 Trina's fraction of James

1/2 x 2/3 = 1/3

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3 years ago

You estimate that a jar contains 68 marbles. The actual number of marbles is 60. Find the percent error. Round your answer to th

ANEK [815]

Answer:

27.2

Step-by-step explanation:

Hello!! I for got how to solve this but, I think it is:

68 x 0.60 = 40.8

68 - 40.8 = 27.2

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3 years ago

Its a fraction division problem its 10over 8 divided by 1 over 6

PilotLPTM [1.2K]

In 10/8 divided by 1/6, you have to do the reciprocal of 1/6 and the dividing symbol... so now it should look like 10/8 times 6/1 . Then you just multiply! <span />

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3 years ago

(Blank) % of $10 = $9<br><br> (L.8 ixl seventh grade)

m_a_m_a [10]

90% of 10 is 9 have a great day

4 0

2 years ago

Read 2 more answers

If a scalene triangle has its measures 4 m, 11 m and 8 m, find the largest angle.

soldier1979 [14.2K]

Answer:

129.8 approximately

Step-by-step explanation:

So this sounds like a problem for the Law of Cosines. The largest angle is always opposite the largest side in a triangle.

So 11 is the largest side so the angle opposite to it is what we are trying to find. Let's call that angle, X.

My math is case sensitive.

X is the angle opposite to the side x.

Law of cosines formula is:

$x^2=a^2+b^2-2ab \cos(X)$

So we are looking for X.

We know x=11, a=4, and b=8 (it didn't matter if you called b=4 and a=8).

$11^2=4^2+8^2-2(4)(8)\cos(X)$

$121=16+64-64\cos(X)$

$121=80-64\cos(X)$

Subtract 80 on both sides:

$121-80=-64\cos(X)$

$41=-64\cos(X)$

Divide both sides by -64:

$\frac{41}{-64}=\cos(X)$

Now do the inverse of cosine of both sides or just arccos( )

[these are same thing]

$\arccos(\frac{-41}{64})=X$

Time for the calculator:

X=129.8 approximately

3 0

3 years ago