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sladkih [1.3K]
3 years ago
9

Stephanie is twice as old as her sister Rosa. If Stephanie is 18 years old, how old is Rosa?

Mathematics
2 answers:
Ghella [55]3 years ago
7 0

Answer:

Stephanie is 18years old and she is twice older than her sister

so rosa is 18÷2(since stephanie is twice older than rosa

so rosa is 9 years old

ruslelena [56]3 years ago
3 0

Answer:

rose. is. 18/2=9 years old

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There are 220 tickets to a school's annual awards banquet. Each adult ticket, a, cost $25 in each student ticket, s, cost $15 ev
aleksley [76]

Answer:

x + y = 220

25 x + 15 y =  4650

The above system can be used to find the number of adult and student tickets sold.

Step-by-step explanation:

Let us assume the number of Adult's ticket sold = x

And The number of student's tickets sold = y

Now, total number of tickets sold = 220

⇒ x + y = 220

Cost of 1 adult Ticket  = $ 25

⇒ Cost of x adult tickets =  x ( $25) = 25 x

Cost of 1 student Ticket  = $ 15

⇒ Cost of y student tickets =  y ( $15) = 15 x

Also, the total amount made from selling all tickets = $4650

⇒ 25 x + 15 y =  $4650

Here, the given system of equations are:

x + y = 220

and 25 x + 15 y =  4650

The above system can be used to find the number of adult and student tickets sold.

7 0
3 years ago
Solve (5b/4a)+(b/3a)-(3b/a)
IRINA_888 [86]
17b/12a and put a minus sign between both equations 
5 0
3 years ago
Please help I'll give 40 points
iris [78.8K]

1.

Use this rule: √ab = √a√b

√12√x^2

Simplify √12 to 2√3

2√3√x^2

Simplify √x^2 to x

2√3x^2

3.

Multiply the numerator and denominator by the conjugate.

2√x/x

8 0
2 years ago
This table shows the number of points a high school basketball team scored during each of its last 10 games.
professor190 [17]

The measure of central tendency that is most affected by the lowest score is; A: The mean.

<h3>How to find the measures of Central Tendency?</h3>

The points table is missing and so I have attached it.

The 3 main measures of central tendency are called mean, median and mode.

Now, from the table attached, if we find the average which is the mean, we will get 56.6.

Now, the mode is the number that occurs the most times. In this case, there is no mode because no number appears more than the other.

For the median, if we arrange in ascending order, we have;

42, 48, 49, 53, 55, 56, 58, 66, 68, 71.

The median = (55 + 56)/2 = 55.5

Now, if we remove the lowest score, the measure that will be most affected will be the mean as the median will only change by 0.5 to 56.

Read more about Measures of Central tendency at; brainly.com/question/17631693

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3 0
1 year ago
To estimate the height of a mountain, two students find the angle of elevation from a point (at ground level) b = 800 meters fro
Nady [450]

Answer: The height of the mountain is 1,331.4 meters (approximately)

Step-by-step explanation: From the information given, the students were standing at point b which is 800 meters from the base of the mountain and the angle of elevation from that point is 59°. Assuming that the ground is level, we can derive a right angled triangle from this set of details and hence we have triangle ABC, where angle β is the reference angle, (59 degrees), BC is the distance from the students to the base of the mountain (800 meters) and the line AC is the height of the mountain.

The line AC is the opposite, since angle B is the reference angle, therefore we shall use the trigonometric ratio as follows;

Tan β = opposite/adjacent

Tan 59 = AC/800

Tan 59 x 800 = AC

1.6643 x 800 = AC

1331.44 = AC

AC ≈ 1331.4

Therefore the height of the mountain is approximately 1,331.4 meters

6 0
3 years ago
Read 2 more answers
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