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Montano1993 [528]
3 years ago
9

At Camp Roan, 70% of the kids are taking horseback riding lessons. If 210 kids are taking horseback riding lessons, how many kid

s are at Camp Roan altogether?
Mathematics
1 answer:
babymother [125]3 years ago
4 0

Answer:

total kids in the camp = 300

Step-by-step explanation:

let the number of kids in the camp be x

from the above situation, we get

=》70% of all kids in the camp is 210

=》

\frac{70}{100}  \times x = 210

=》

x =  210 \times  \frac{100}{70}

=》

x = 3 \times 100

=》

x = 300

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Which expression is equivalent to 5^3?
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C and D

Step-by-step explanation:

5^3 - 5^0 = 125 - 1 = 124, so it's not A

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5^7 * 5^-4 = 5^(7+(-4)) = 5^3, so it can be C

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2 years ago
What's (9+9i)(-1-5i) using foil method
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36-54i

Step-by-step explanation:

(9+9i)(-1-5i)

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5 0
3 years ago
3. Consider the sequence,-8, -5, -2, 1, ...
Naddik [55]

Answer:

a) a_n=3\,n-11

b) a_{20}=49

c) term number 17 is the one that gives a value of 40

Step-by-step explanation:

a)

The sequence seems to be arithmetic, and with common difference d = 3.

Notice that when you add 3 units to the first term (-80, you get :

-8 + 3 = -5

and then -5 + 3 = -2 which is the third term.

Then, we can use the general form for the nth term of an arithmetic sequence to find its simplified form:

a_n=a_1+(n-1)\,d

That in our case would give:

a_n=-8+(n-1)\,(3)\\a_n=-8+3\,n-3\\a_n=3n-11

b)

Therefore, the term number 20 can be calculated from it:

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c) in order to find which term renders 20, we use the general form we found in step a):

a_n=3\,n-11\\40=3\,n-11\\40+11=3\,n\\51=3\,n\\n=\frac{51}{3} =17

so term number 17 is the one that renders a value of 40

5 0
3 years ago
The bill for the repair of a computer was $179. The cost of part was $44, and labor charge was $45 per hour. How many hours did
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Alright! First you'd subtract the amount of the part ($44) from your total ($179), then you'd divide by the rate of cost ($45). Your equation would be:
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The answer is 3 hours.
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