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
AVprozaik [17]
2 years ago
5

The incomplete table below summarizes the number of left-handed students and right-handed students by gender for the eighth-grad

e students at Keisel Middle School. There are 5 times as many right-handed female students as there are left-handed female students, and there are 9 times as many right-handed male students as there are left-handed male students. if there is a total of 18 left-handed students and 122 right-handed students in the school, which of the following is closest to the probability that a right-handed student selected at random is female? (Note: Assume that none of the eighth-grade students are both right-handed and left-handed.)
A) 0.410
B) 0.357
C) 0.333
D) 0.250

Mathematics
1 answer:
vova2212 [387]2 years ago
7 0

Answer: A) 0.410

In order to solve this problem, you should create two equations using two variables (x and y) and the information you're given. Let x be the number of left-handed female students and let y be the number of left-handed male students. Using the information given in the problem, the number of right-handed female students will be 5x and the number of right-handed male students will be 9y. Since the total number of left-handed students is 18 and the total number of right-handed students is 122, the system of equations below must be true:

x+y=18

5x+9y=122

You might be interested in
Please answer!!! Will mark brainliest answer !!!
kenny6666 [7]

Answer:

A, D

Step-by-step explanation:

When we multiply the fractions, we can get:

\frac{1}{5^{4} }

This is also equivalent to:

5^{-4}

When looking at the answer choices, the only ones that equal 5^{-4} are A and D because:

(5^{-2})^{2}  =5^{-4}

5^{2}*5^{-6} = 5^{-4}

3 0
2 years ago
NASA launches a rocket at t = 0 seconds. Its height, in meters above sea-level, as a function of time is given by h ( t ) = − 4.
Aleks [24]

Answer:

A.) 24.08 seconds

B.) 825.42 metres

Step-by-step explanation:

function of time is given as

h ( t ) = − 4.9 t 2 + 118 t + 115 .

Where a = -4.9, b = 118, c = 115

Let's assume that the trajectory of the rocket is a perfect parabola.

The time t the rocket will reach its maximum height will be at the symmetry of the parabola.

t = -b/2a

Substitute b and a into the formula

t = -118/-2(4.9)

t = 118/9.8

t = 12.041 seconds

Since NASA launches the rocket at t = 0 seconds, the time it will splash down into the ocean will be 2t.

2t = 2 × 12.041 = 24.08 seconds

Therefore, the rocket splashes down after 24.08 seconds.

B.) At maximum height, time t = 12.041s

Substitute t for 12.041 in the function

h ( t ) = − 4.9 t 2 + 118 t + 115

h(t) = -4.9(12.041)^2 + 118(12.041) + 115

h(t) = -4.9(144.98) + 118(12.041) + 115

h(t) = -710.402 + 1420.82 + 115

h(t) = 825.42 metres

Therefore, the rocket get to the peak at 825.42 metres

6 0
3 years ago
What values for x and y make △MNO≅△PRT?
skad [1K]
The answer is g) y= 27.6 and x=11
1.5y=41.4
1.5y/1.5=41.4/1.5
y=27.6
4 0
3 years ago
Read 2 more answers
Find the mean of the following numbers 7 21 2 17 3 13 7 4 9 7 9
Hitman42 [59]

Answer:

9

Step-by-step explanation:

sum of the terms

mean=------------------------------

number of the terms

6 0
2 years ago
PLS HELP ASAP DUE IN 40 MINUTES
Dmitriy789 [7]

Answer:

It is  (A)  4 congruent faces

Step-by-step explanation:

Easy to see how its the Base sides

-Hope it helped

3 0
2 years ago
Read 2 more answers
Other questions:
  • How to classify 8x4 + 7x3 + 5x2 + 8 by number of terms.
    13·2 answers
  • A meteorologist at a television station that a town received 0.95 in of rain. What fraction is equivalent to this amount of rain
    15·2 answers
  • Ivan's has 3/4 pound of hamburger meat. She makes 3 hamburgers patties.each patty weighs the same amount.hiw much dies each hamb
    13·2 answers
  • Which is a true statement about a 45-45-90 triangle
    5·2 answers
  • Using the Addition Method, solve for y in the following system of linear equations.
    8·1 answer
  • Name a pair of adjacent angles. explain why they are adjacent. Name a pair of acute vertical angles. Name a pair of supplementar
    5·1 answer
  • Question 5 (1 point)
    14·1 answer
  • ABC is a triangle.<br> Work out the size of the angle marked p.
    13·1 answer
  • Plssssssssssssss help
    8·1 answer
  • jada and christian are saving money. Jada starts with $400 in her savings account and adds $15 per week. Christian starts with $
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!