1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
MaRussiya [10]
2 years ago
11

I will mark brainliest

Mathematics
1 answer:
dalvyx [7]2 years ago
6 0

Answer:

Step-by-step explanation:

This is 30°-60°-90° triangle, so the sides are in the ratio 1:√3:2

The side opposite the 30° angle is 10√3, so the side opposite the 60° angle is √3×10√3= 30, and the side opposite the 90° angle is 2×10√3 = 20√3.

You might be interested in
Tickets for a school play sold for $7.50 for each adult and $3.00 for each child. The total receipts for 118 tickets totaled $69
NeX [460]
X= number of adult tickets
y=number of child tickets.
we can suggest this system of equations: 
x+y=118                 ⇒x=118-y
7.5x+3y=696

we can solve this system of equations by substitution method:
7.5(118-y)+3y=696
885-7.5y+3y=696
-4.5y=-189
y=-189/-4.5
y=42

x=118-y
x=118-42
x=76

Answer: the number of adult tickets sold was 76. 
7 0
3 years ago
PLEASE SOLVE 20 POINTS
Soloha48 [4]

Answer:

1. Not possible. The slope of such a line is undefined. Its equation is x=7.

2. y = 3x -2

3. The slope is undefined. (The line is a vertical line.)

Step-by-step explanation:

1. The y-axis is a vertical line. Computing the slope of such a line involves division by zero, an operation that is undefined. Since the line is parallel to the y-axis, there is no y-intercept.

In slope-intercept form, the equation would be useless:

... y = (undefined)x + (no such value)

If your point is supposed to be (7, 8)*, the more useful equation is the "standard form" equation:

... x = 7

2. The slope of the perpendicular line is the negative reciprocal of this:

... m = -1/(-1/3) = 3

In point-slope form, the equation of the perpendicular line through the given point is ...

... y = 3(x -2) +4

... y = 3x -2 . . . . . . . . simplified to slope-intercept form

3. The slope is computed from ...

... m = (change in y)/(change in x) = (-3 -4)/(-1 -(-1)) = -7/0 = undefined

The slope is undefined. This tells you the line is a vertical line. Its location is the x-value of the points, ...

... x = -1

_____

* If your point is really (77, 88), then the line has equation x = 77.

8 0
3 years ago
Read 2 more answers
Girl runs across Across a rectangle field diagonal covering a distance of 120m if the length of the field is 100m calculate the
Mariulka [41]

Answer:

66m

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
el jefe decidió agregar la tabla de frecuencias correspondiente a la edad de sus empleados tal Como se muestra a continuación Cu
lapo4ka [179]

Answer:

Average employee [Mean] = 43.6

Step-by-step explanation:

Given:

Interval   Number of employee

25-35                      20

35-45                      7

45-55                      8

55-65                     15

Total                       50

Find:

Average employee [Mean]

Computation:

Interval     X[u+l]/2 Number of employee   fx

25-35         30           20                              600

35-45         40             7                              280

45-55         50            8                              400

55-65         60            15                             900

Total                           50                            2,180

Average employee [Mean] = Sum of fx / Sum of x

Average employee [Mean] = 2,180 / 50

Average employee [Mean] = 43.6

5 0
3 years ago
A poll conducted in 2013 found that 55% of U.S. adult Twitter users get at least some news on Twitter (Pew, 2013). The standard
alina1380 [7]

Answer:

The 99% confidence interval for the fraction of U.S. adult Twitter users who get some news on Twitter is between 49.34% and 60.66%, which means that we are 99% sure that the true percentage of US adult Twitter users who get some news is in this interval.

Step-by-step explanation:

Confidence interval:

A confidence interval has the following format:

M \pm zs

In which M is the sample mean, z is related to the confidence level and s is the standard error.

55% of U.S. adult Twitter users get at least some news on Twitter (Pew, 2013). The standard error for this estimate was 2.2%.

This means that M = 55, s = 2.2

99% confidence level

So \alpha = 0.01, z is the value of Z that has a pvalue of 1 - \frac{0.01}{2} = 0.995, so Z = 2.575.

Lower bound of the interval:

M - zs = 55 - 2.575*2.2 = 49.34

Upper bound:

M + zs = 55 + 2.575*2.2 = 60.66

The 99% confidence interval for the fraction of U.S. adult Twitter users who get some news on Twitter is between 49.34% and 60.66%, which means that we are 99% sure that the true percentage of US adult Twitter users who get some news is in this interval.

6 0
2 years ago
Other questions:
  • What is P(-5) if P(x) = -x^3-4x^2+x-2?
    8·1 answer
  • Melanie’s bedroom walls are 45% painted. The area of her walls totals 420 square feet. What is the number of square feet of Mela
    8·2 answers
  • What is a simple rule for adding and subtracting like fractions
    15·2 answers
  • Help please !!! Help
    8·1 answer
  • Jills mom stored some of the honey in a container that held 3/4 of a gallon she used half of thid amount to sweeten tea how much
    11·1 answer
  • I NEED Help Please Help
    10·1 answer
  • What percent of 965 is<br> 1932
    11·2 answers
  • Combine like terms:<br>12x + 3y + 4 - 6y - 9​
    8·2 answers
  • Find the value of a if d=80, v^0=50 and t=8
    6·1 answer
  • Elena repairs pinball machines. She orders a part that costs $44.50. She also returns parts that cost $26.30 and $21.40. Is the
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!