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loris [4]
3 years ago
10

Mr. Mason’s class is going on a field trip. There are 27 students. There will be 1 adult for every 9 students. Mr. Mason wants t

o know how many adults (n) are needed for the field trip. Which of the following equations should he use?
A. 9n + 27
B. 27 – 9n
C. 9n = 27 - 1
D. 9n = 27
Mathematics
2 answers:
Natalka [10]3 years ago
6 0
I think it would be d
I hope that helps?
Dafna1 [17]3 years ago
3 0

Answer:

D. 9n = 27

Step-by-step explanation:

If we need one adult for every 9 students, we can represent that as 9n:

if n is the number of adults.

Because we have 27 students, the equation 9n = 27 works.

A better way of formatting the equation is:

n = 27/9

Because it directly shows what the number of adults is, but with some reformatting, it is clearly the same equation.

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Simplify the square root of 32/5
elixir [45]
Remember \sqrt{ \frac{x}{y} } = \frac{ \sqrt{x} }{ \sqrt{y} }
and
\sqrt{ab^2} =b \sqrt{a}
\sqrt{ \frac{32}{5} } = \frac{ \sqrt{(4^2)(2)} }{ \sqrt{5} } = \frac{ 4\sqrt{2} }{ \sqrt{5} }
times whoe thing by \frac{ \sqrt{5} }{ \sqrt{5} }
\frac{4 \sqrt{10} }{5}


3 0
2 years ago
Find the length of the cardioid r=5+5cosθ.
ipn [44]
Hello,

r=5(1+cos t)

r'=5(-sin t)

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Between 0 and π, sin x>0 ==>|sin x|=sin x
l= 2*5* \int\limits^{\pi}_0{sin( \frac{t}{2} )} \, dt= 5[-cos (t/2)]_0^{\pi}\\\\
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Here is the method but i may have make some mistakes.






3 0
3 years ago
What is 1.6 powered by 2
ss7ja [257]

Answer:

2.56

Step-by-step explanation:

1.6^2 = 1.6 * 1.6 = 2.56

7 0
2 years ago
What does to solve the equation x - 2 = 9 (hint: you would need to subtract 2) form both sides of the equation am I correct?
geniusboy [140]

Answer:

I think the answer to X = 11.

Step-by-step explanation:

X - 2 = 9, correct?

11 - 2 = 9.

I hope this can help! Please correct me

if i got it wrong. :D

7 0
2 years ago
Kelly bought a new pair of shoes for $9.95. Wendy paid 4.2 times this amount for a new pair of shoes. What price did Wendy pay f
ExtremeBDS [4]

wendy paid $41.79.

kelly's shoes were $9.95, and wendy paid 4.2 times more.

just multiply 9.95 with 4.2.

9.95 x 4.2 = 41.79

7 0
3 years ago
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