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3 years ago

Solve an equation 3n+2=83+8n

1 answer:

34kurt3 years ago

4 0

To solve follow these steps:

3n+2=83+8n
3n=81+8n (subtract 2 on each side)
-5n=81 (Subtract 8n)
n=-81/5 (divide by -5)

~I hope this helps!~

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Kermit The Frog could eat 8 flies in 30 minutes. How long would it take Kermit to eat 20 flies? (write the answer in minutes ¬¬¬

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75 minutes

Step-by-step explanation:

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3 years ago

Ms.jan brought in cookies for her class.She gave out half of them in the morning. At lunch,she gave out 12 more.She then had 1o

Nikolay [14]

Answer:

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I HOPE THIS HELPS :)

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2 years ago

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What is the answer to that problem?

Rom4ik [11]

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3 years ago

Which term has the definition "The value that describes the location of a digit within a number, such

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3 years ago

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Two forces with magnitudes of 150 and 75 pounds act on an object at angles of 30° and 150°, respectively. Find the direction and

Anastaziya [24]

The problem is modelled in the first picture shown below

To work out the resultant vector, we modelled the vectors 150N and 75N as triangle AOB is shown in the second picture with AB as the resultant vector.

We use the cosine rule to work out the length AB
$AB^{2}= 75^{2}+ 150^{2}-(2*75*150*cos(60))$
$AB^{2} =28125-11250$
$AB^{2}=16875$
$AB= \sqrt{16875} =130$ (nearest whole number)

The third picture shows the full diagram of the vectors

To work out the direction of the resultant vector, we use the sin rule to find the size of angle A and angle B

Angle A
$\frac{130}{sin(60)}= \frac{75}{sin(A)}$
$130sin(A)=75sin(60)$
$sin(A)= \frac{75sin(60)}{130}$
$sin(A)=0.4996300406$
$A= sin^{-1}(0.4996300406)$
$A=30$ (rounded to nearest whole number)

Angle B
$B=180-60-30=90$

Direction is 60° toward negative x-axis

Answer: Magnitude 130N and direction 60° toward negative x-axis

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4 years ago