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Georgia [21]
3 years ago
12

Find the common ratior r for the geometric sequence and use r to find

Mathematics
2 answers:
kari74 [83]3 years ago
8 0
It happens to be 7 i think
Pani-rosa [81]3 years ago
8 0

Answer:

r = -3

Step-by-step explanation:

to find r divide the 2nd term by the first:

9/ -3 = -3

to check if this is the same ratio for each number divide it by the ratio to get the number before it:

-27/ -3 = 9

81/ -3 = 27

to find the next three terms multiply the last number by the ratio then repeat

(81)(-3) = -243

(-243)(-3) = 729

(729)(-3) = -2187

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Angle RST is a right angle. Angle RSU has a measure of 25°.
Angelina_Jolie [31]

Keywords

complementary angles, right angle

we know that

If two angles are <u>complementary angles</u>, then their sum is equal to a <u>right angle</u>

In this problem

Angle\ RSU+Angle\ TSU=90\° -------> by <u>complementary angles</u>

we have

Angle\ RSU=25\°

Substitute and solve for Angle TSU

Angle\ TSU=90\°-25\°=65\°

therefore

the answer is the option

65\°

5 0
3 years ago
Read 2 more answers
Question
Fantom [35]

Answer:

18....I hope thats righ

Step-by-step explanation:

7 0
3 years ago
Percentage grade averages were taken across all disciplines at a particular university, and the mean average was found to be 83.
Georgia [21]
Correct Ans:
Option A. 0.0100

Solution:
We are to find the probability that the class average for 10 selected classes is greater than 90. This involves the utilization of standard normal distribution.

First step will be to convert the given score into z score for given mean, standard deviation and sample size and then use that z score to find the said probability. So converting the value to z score:

z-score= \frac{90-83.6}{ \frac{8.7}{ \sqrt{10} } } \\  \\ &#10;z-score =2.326

So, 90 converted to  z score for given data is 2.326. Now using the z-table we are to find the probability of z score to be greater than 2.326. The probability comes out to be 0.01.

Therefore, there is a 0.01 probability of the class average to be greater than 90 for the 10 classes.
5 0
3 years ago
Determine whether (18 + 35) × 4 = 18 + 35 ×4 is true or false. explain
fomenos
The first one  is 212 
and the second one is 158
so yes it is false they do not equal

6 0
3 years ago
The newspaper says the only 42% of registered voters voted to determine a school bond election. If 11,960 people voted, how many
umka2103 [35]
42% of the body voted = 11960
Total student body = 11960/42% = 28476.19 = 28476 students
7 0
3 years ago
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