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
taurus [48]
3 years ago
10

I need help on number 15

Mathematics
1 answer:
garri49 [273]3 years ago
3 0
Okay, you now a triangle has 180º degrees and to add to 180º, you have to add all the numbers you have like this:
2x+x+90 (the box is 90º)=180º; add like terms like 2x+x
3x+90=180; cancel 90 by subtracting it and also subtract 90 from 180
3x=90;divide 3 to isolate x and also divide 90/3
x=30 :)
You might be interested in
An unfair coin with​ Pr[H] = 0.2 is flipped. If the flip results in a​ head, a marble is selected at random from a urn containin
satela [25.4K]
Normally when dealing with coins the probability of getting heads or tails is 0.5 each. However in this case since its an unfair coin, the probability of getting heads is 0.2. 
H - head 
T - tails
R - red marble
pr (H) = 0.2
urn
6 red and 4 blue
pr (T)   = 0.8
urn
3 red and 5 blue

when heads is obtained 
red - 6/10 -0.6
blue - 4/10 - 0.4
therefore when multiplying with 0.2 probability of getting heads
pr (R ∩ H) red - 0.6*0.2 = 0.12

when tails is obtained 
red - 3/8 - 0.375
blue - 5/8 - 0.625
when multiplying with 0.8 probability of getting tails
pr (R ∩ T) red - 0.375 * 0.8 = 0.3

using bayes rule the answer can be found out, 
the following equation is used;
pr (H | R) = pr (R ∩ H) / {pr (R ∩ H) + pr (R ∩ T)}
               = 0.12 / (0.12 + 0.3)
               = 0.12 / 0.42
               = 0.286
the final answer is 0.286
6 0
3 years ago
John gave 23/25 of an orange to his best friend. What
Zarrin [17]

Answer:

80%

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Write the equation of a line given its slope,m=6 and its y-intercept, b=-5
dimaraw [331]

Answer:

Y = 6X-5

Step-by-step explanation:

substitute the value of slope and Y intercept in the standard equation Y = MX + B

where M is the slope and b is the y-intercept

8 0
3 years ago
I’ll give brainliest to who ever answers correct
nasty-shy [4]

Answer:

im gonna guess b

Step-by-step explanation:

sry if wrong

5 0
3 years ago
A school club has ordered a box of 50 booklets for a fundraiser. Unfortunately, 10 of the booklets are missing several pages. A
Airida [17]

Answer:

50%

Step-by-step explanation:

4 0
2 years ago
Other questions:
  • the only difference between an isosoleces trapezoidand parallel trapezoid are that the non-parellel sides are congruent
    12·1 answer
  • Please help one of my last questions.....
    7·1 answer
  • Graph these two equations.<br> y= 2x - 3<br> x + 2y = 4
    13·1 answer
  • An animal shelter houses ferrets, cats, and dogs. There are 108 animals at the shelter. Of the
    11·1 answer
  • 10 to the power of 3 times what equals 630
    7·2 answers
  • Solve the following for x:
    8·1 answer
  • Divide \ 4x^ 4 +8x^ 3 -10x^ 2 +4x-6\ 10x^ 2 +4x-6)by(2x^ 2 +4x-6) .
    10·1 answer
  • Which graph represents inequality y &lt;2x+3
    14·1 answer
  • Does anyone know how to solve this <br> The answer is B but can anyone explain why
    13·1 answer
  • Please help me with this math problem!! Will give brainliest!! :)
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!