Mathematics College


A math class has 9 girls and 1 boy in the seventh grade and 3 girls and 3 boys in the eighth grade. The teacher randomly selects a seventh grader and an
eighth grader from the class for a competition. What is the probability that the students she selects are both boy?

Answers

Answer 1

Answer:

10% of choosing a 7th grade boy.

50% of choosing 8th grade boy

Step-by-step explanation:

Answer 2

Answer:

Step-by-step explanation:

prob(boy 7th grade)= 1/10  it is just one boy out of 10 students

prob(boy 8th grade)= 3/6=1/2  there are 3 boys out of 6 students

Prob(both boys)=( 1/10)*(1/2)=1/20

Related Questions

4j + 4 =
Next, subtract 4 from both sides.
4j

Answers

Answer:

4j=-4

j=-1

Step-by-step explanation:

Answer:

4j=-4  j=-1

Step-by-step explanation:

If 7x-3x+17-x+1=108, what is the value of 4x+x?

Answers

Answer:

150

Step-by-step explanation:

1. combine like terms

7x-3x-1x=3x

17+1=18

2. subtract

108-18=90

3. divide

90/3=30

which means x=30

4. plug it in

4X30+30=150

3. Find the annual salary for Kathy if she is paid $2.100 every other week.
Annual Salary = Biweekly Salary * 26

Answers

Annual salary = $2,100 x 26
= $54,600

In the sixth grade, 54% of the students are boys. There are 189 boys in the sixth grade. What is the total number of students in sixth grade? A. 54 B. 161 C. 189 D. 350. (explain what did u do to get you're answer )​

Answers

Answer:

D

Step-by-step explanation:

189 boys is 54%

x is 46%(100-54)

Cross multiply:

189*46%=54%*x

86.94=0.54x

x=161

189 boys 161 girls

350 altogether

So D

Hope this helps plz hit the crown :D

Parker grew
2 1/2 inches each year for the past 3 years. How many inches total has Parker grown in the past 3
years?

Answers

Answer:

it will be 7 and 1/2

Step-by-step explanation:

2 and 1/2 x 3=7 and 1/2

F(x)=43

f(x)=-6×+7

Not sure how to get the answer wondering if someone can break it down for me please

Answers

set them equal to eachother to solve for x
43=-6x+7
36=-6x
-6=x

Step-by-step explanation:

Since f(x) is 43 you would replace it for the f(x) in the bottom equation like this 43=-6×+7 then you would multiply the left side so now it would be 43=-42 and this a no solution.

A club has 11 members.
a) How many different 3-member committees could the club form?
b) In how many ways can a club president, treasurer, and secretary be chosen?
c) By what factor do the answers in parts b) and c) differ? How do you account for this difference?

Answers

Answer:

good

Step-by-step explanation:

calculate it on alculator

Help I need the answer as soon as possible

Answers

Answer:

D.

Step-by-step explanation:

First, you multiply 18 1/4 with 10 1/2 and you get 191 5/8. Then you multiply 191 5/8 with 12 3/4 and you get D. 2443 7/32

Evaluate the following expression. y + 9 when y = 12

Answers

Answer:

21

Step-by-step explanation:

y+9 = ?

y=12

12+9=21

Answer:

3

Step-by-step explanation:

Stephanie put $300 into an account with 3% annual simple interest.
How long will it take for Stephanie to earn $90 in interest?

Answers

Answer:

Step-by-step explanation:

10 years

What is the Slope of the slide?

Answers

Answer:

[tex]\frac{1}{2}[/tex]

Step-by-step explanation:

Points on line: (1,2) (3,3)

[tex]\frac{2-3}{1-3}[/tex] = [tex]\frac{-1}{-2}[/tex] = [tex]\frac{1}{2}[/tex]

5. Which is the best first step to solve 5x+12x = 40 by completing the square?

A. Subtract 40 from both sides.

B. Divide all terms by 12.

C. Divide all terms by 5

D. Divide 12 by 2

Answers

Answer:

B

Step-by-step explanation:

To make the perfect square the first step is  Subtract 40 from both sides option (A) is correct.

What is a quadratic equation?

Any equation of the form [tex]\rm ax^2+bx+c=0[/tex]  where x is variable and a, b, and c are any real numbers where a ≠ 0 is called a quadratic equation.

As we know, the formula for the roots of the quadratic equation is given by:

[tex]\rm x = \dfrac{-b \pm\sqrt{b^2-4ac}}{2a}[/tex]

The complete question is:

Which is the best first step to solve 5x²+12x = 40 by completing the square?

A. Subtract 40 from both sides.B. Divide all terms by 12.C. Divide all terms by 5D. Divide 12 by 2

We have a quadratic equation:

5x²+12x = 40

To make the perfect square:

First, subtract 40 from both sides.

5x²+12x - 40 = 40 - 40

5x²+12x - 40 = 0

Thus, to make the perfect square the first step is  Subtract 40 from both sides option (A) is correct.

Learn more about quadratic equations here:

brainly.com/question/2263981

#SPJ2

Find the area of the trapezoid below.
4 cm
3 cm
8 cm

Answers

Answer:

4 + 8 / 2 * 3 = 18

4 + 8 = 12

12 / 2 = 6

6 * 3 = 18

Step-by-step explanation:

*Hope this helps*

There are 82 chairs at a birthday party. The chairs need to be lined up in equal-sized rows. How many possible ways can the chairs be lined up?

Explain your answer using complete sentences.

Answers

Answer:

2 rows of 41

Step-by-step explanation:

....... i think

I have the same question, and I have nothing in my brain....-_-''

Which inequality describes all the solutions to 5(3 – x) < -2x + 6?

Answers

Answer:

3 < x

Step-by-step explanation:

1. Use distributive property for 5(3-x)

2. add x to each side

3. subtract 6 from 15

4. divide 3 from 9

3 < x

you had $20 at the beginning of the week you worked 10 hours during the week having $70 how much do you earn each hour

Answers

Answer:

You need more deatils, did you work 24 hours per day or 9 hours. my question is how many hours a day did you work?

Fine the values of x and y. Please explain .

Answers

.hhdjekekeke kekelekwkwkwkww

Solve for w. You must write your answer in fully simplified form.
19 = -8w

Answers

Answer:

The answer is 11

Helpppppppppppppppppp

Answers

Answer:

ik that problem gimmie a sec

Step-by-step explanation:

Step-by-step explanation:

since 1 and 2 are same the lines which create 1(g and p) and 2(h and r)

the lines g h and p r shoul be parallel. we also know that g h is parallel which proves that p and r should be parallel as well

PLZZ SOMEONE GIVE ME THE EQUATION!! You have $20 to buy snacks for yourself and 4 friends. If you buy a bag of chips for each person, and still have $13.75 left, how much did you spend on each bag of chips? ​

Answers

Answer:

1.56

Step-by-step explanation:

Answer:

1.25

Step-by-step explanation:

20-13.75 = 6.25

6.25 / 5 = 1.25

If m is a multiple of 20 then m is also a multiple of 10 true or false​

Answers

True .... I think?? Cuz if m=40 (cuz 40 is a multiple of 20) and 40 is also a multiple of 10

Find the maximum value of the function
f(x) = –22 – 15.9x – 57 to the nearest hundredth.

Answers

8 fishi i ndrysheses se nje numrime 7

this is due in a few hours can yall help me

Answers

Answer:

18%, 34%, 9/25, 0.25

Step-by-step explanation:

36% = 18%

17/50 = 34%

0.18 = 9/25

1/4 = 0.25

At a bakery every 4th coustmer recives a free cookie snd every 10th customer recives a free drink. Which customer will be the first to recive a free cookie and a free drink

Answers

Answer:

40th costumer

Step-by-step explanation:

The 40th costumer will receive a free cookie and drink. You need to find factors of 4 and factors of 10. Then when you find 4 and 10 have the same factor that’s your answer. So you do 4,8,16,24,32,36,40,44,48, etc. (counting up by 4) now do it to 10,20,30,40,50,60,70, etc. (counting up by 10) Now you notice that the first number that is the same is 40. So that means the 40th costumer will be the first one to receive a free drink and cookie.

Customer first to receive a free cookie and a free drink is 20th number customer

Given that;

Number of customer received free cookie = 4th

Number of customer received free drink = 10th

Find:

Customer first to receive a free cookie and a free drink

Computation:

Customer first to receive a free cookie and a free drink = LCM of 4 and 10

Customer first to receive a free cookie and a free drink = 20th number customer

Learn more:

https://brainly.com/question/1879445?referrer=searchResults

Describe the transformation that takes f (x) = x + 1 To g (x) = -x + 4. [ Please No Plagiarism and Will mark brainliest . .​

Answers

Answer:

fliped over y axis and moved up 3

Step-by-step explanation:

fliped over y axis (changed x to -x) and moved up 3 (changed +1 to +4)

Answer:

why did you delete my answer HUH?

Step-by-step explanation:

A jar contains 12 pink, 8 yellow, 6 blue and 10 green jelly beans. If a Jelly Bean is
chosen at random, find each probability as a DECIMAL rounded to the nearest
HUNDREDTHS place.

Answers

Answer:

Pink: 0.33

Yellow: 0.22

Blue: 1.67

Green: 0.28

Step-by-step explanation:

Total of Jelly Beans: 36

Pink: [tex]\frac{12}{36}[/tex] = 0.33

Yellow: [tex]\frac{8}{36}[/tex] = 0.22

Blue: [tex]\frac{6}{36}[/tex] = 1.67

Green: [tex]\frac{10}{36}[/tex] = 0.28

HELP ASAP what's the reason for statement 3, WILL GIVE BRAINLIEST​

Answers

Answer:

From prove

Step-by-step explanation:

from prove

Explanation

Two angles are called complementary when their measures add to 90 degrees

Ive been trying to figure out this problem, I’m not sure if each fruit is measures per pound. Please help!

Answers

Answer:

e

Step-by-step explanation:

i will give free points to people who answer my problem

Answer:

Elena spent [tex]p-3.45[/tex] more than Taniy

Step-by-step explanation:

LET THE PRICE OF CHERRY PER POUND BE "p" !!!!!

Elena bought a watermelon for = $7.75

Elena bought 3 pounds of cherry for = $3p

Total money spent by Elena = 3p + 7.75

Taniy bought a pineapple for = $4.35

Taniy bought 2 pounds of cherry for = $2p

Total money spent by Taniy = 2p + 4.35

More money spent by Elena than Taniy =

[tex](3p+7.75)-(2p+4.35)\\=>3p+7.75-2p-4.35\\=>3p-2p+7.75-4.35\\=>p-3.45[/tex]

What is the equation of the line that passes through the point (2,0) and has a slope of 5/2

Answers

Answer :

y = 5/2x - 5

Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Here m = 5/2 , thus
y = 5/2x + c ← is the partial equation
To find c substitute (2, 0) into the partial equation
0 = 5 + c ⇒ c = 0 - 5
y = 5/2x - 5 ← equation of line

Does the table represent y as a function of x?

Answers

Answer:

yes

Step-by-step explanation:

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