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alexgriva [62]
3 years ago
10

Trinity's science instructor entered the 7th students in a STEM competition. There was an enrollment fee of $50 and an additiona

l fee of $12 for each packet of 10 tests. The total cost was $170. How many tests were purchased?
Which of the following equations best models the situation?
Question 1 options:

12x + 50 = 170


50x + 12 = 170


12x - 50 = 170


50x - 12 = 170
Mathematics
1 answer:
lina2011 [118]3 years ago
3 0
12x +50 = 170
-50 -50
12x=120
/12 /12
x=10

Ten packets were purchased
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Rewrite using a single positive exponent. 3-6 -5​
yarga [219]

Answer:

1 \div {3}^{( 30)}

Step-by-step explanation:

There are exponent rules I posted above that are being used here.

We have (3^-6)^-5

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So, we're left with 3^-30.

If you look at the photo, there's a rule for negative exponents.

Take the inverse of the base number, so 3 in this case:

1 / 3

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3 0
2 years ago
Which rule can be used to describe the growth of the y vales of the function y=12^x over each interval from x=-1 to x=3?
valentinak56 [21]
The function is f(x)=12^x. 

This means that as we get from 1 to 2, we have the following values:

f(1)=12^1=12, and f(2)=12^2=12\cdot12.

Similarly, if we check x=3, we have f(3)=12^3=12\cdot12\cdot12.


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Answer: multiply by 12
5 0
3 years ago
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What is the value of a1 of the geometric series? Sigma-Summation Underscript n = 1 Overscript infinity EndScripts 12 (negative o
worty [1.4K]

Answer:

12

Step-by-step explanation:

The given geometric series is

\sum_{n = 1}^{ \infty} 12( { -  \frac{1}{9} })^{n - 1}

We want to determine the first term of this geometric series.

Recall that the explicit formula is

a_{n} = 12( { -  \frac{1}{9} })^{n - 1}

To find the first term, we put n=1 to get:

a_{1} = 12( { -  \frac{1}{9} })^{1 - 1}

This gives us:

a_{1} = 12( { -  \frac{1}{9} })^{0}

a_{1} = 12(1) = 12

Therefore the first term is 12

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3 years ago
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elena-s [515]

Answer:

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Step-by-step explanation:

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AYO PLEASE HELP ILL GOVE YOU BRAINLIEST
tamaranim1 [39]

it's a i think, hope this helps

6 0
2 years ago
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