Mathematics College

a girl is 10 years older then her brother. By next year, she will be twice the age of her brother. what are their ages now?​

Answers

Answer 1

Answer:

20 years old.

Step-by-step explanation:

let me know if I'm right or not

Related Questions

Does anyone know the answer?

Answers

Step-by-step explanation:

Yes sure.

a. New value of painting=60/100×$550=$330

b. New value of vase=70/100×$395=$276.5

c. New value of clock=180/100×$1175=$2115

d. New value of chair=95/100×$745=$707.75

find the length of the unknown side

Answers

Answer:

20

Step-by-step explanation:

15^2 + b^2 = 25^2

Two college instructors are interested in whether or not there is any variation in the way they grade math exams. They each grade the same set of 10 exams. The first instructor's grades have a variance of 58.9. The second instructor's grades have a variance of 84.8. Test the claim that the first instructor's variance is smaller. (In most colleges, it is desirable for the variances of exam grades to be nearly the same among instructors.) The level of significance is 10%. (Recall: that the larger of the 2 variances needs to be in the numerator as the test is 1-tailed to the right)

Answers

Answer:

Since the calculated value of F = 1.4397 is less than the critical value of

F (9,9)= 2.4403 we conclude that the  first instructor's variance is smaller and reject H0.

Step-by-step explanation:

1)Formulate the hypothesis that first variance is equal or greater than the second variance

H0: σ₁²≥σ₂²  against the claim  that the first instructor's variance is smaller

 Ha: σ₁²< σ₂²

2) Test Statistic F= s₂²/s₁²

F= 84.8/ 58.9=  1.4397

3)Degrees of Freedom = n1-1= 10-1= 9  and n2 = 10-1= 9

4)Critical value   at 10 % significance level= F(9,9)= 2.4403

5)Since the calculated value of F = 1.4397 is less than the critical value of

F (9,9)= 2.4403 we conclude that the  first instructor's variance is smaller and reject H0.

Angles c and d are complementary. If angle c is 2x and angle d is 66, what is the value of x?

Answers

Answer:

x=12

Step-by-step explanation:

Complementary angles add up to 90 degrees. 90-66=24. 24 divided by 2 is 12.

the graph (shown in red) below shows the solution set of which inequality?

Answers

Answer:

I think that is a

Step-by-step explanation:

Tricia looked at a map of an amusement park that used the scale 1 inch = 1 meter. On the map the roller coaster was 5 inches from the ice cream stand. When Tricia gets off the roller coaster, how far will she have to walk to get to the ice cream stand?
A. 3 inches
B. 6 inches
C. 4 meters
D. 5 meters

Answers

Answer:

D = 5 meters

Step-by-step explanation:

1 inch = 1 meter                      

5 inch = 5 meter

Whatever you do to one side you do the same to the other.


Pls help me with this

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i think it’s C. 2 bins

hope this helps! sorry if i’m wrong:)
i think it is 1/18 :)

Solve for y: 3d = 7y + 5

Answers

Answer:

d = [tex]\frac{7y+5}{3}[/tex]

Step by step explanation:

3d = 7y+5

Divide both sides by 3

[tex]\frac{3d}{3}[/tex]= [tex]\frac{7y}{3}[/tex]+ [tex]\frac{5}{3}[/tex]

Simplify

[tex]\frac{7y+5}{3}[/tex]

There are 4 triangles and 16 squares.what is the simplest ratio of triangles to square

Answers

1:4
The ratio of triangles to squares is 4:16 unsimplified because there are 4 triangles and 16 squares. To simplify the ratio, think of it as a fraction:
4/16
The fraction can be simplified to 1/4, meaning that the simplest ratio is 1:4.

Which is the correct vertical cross section through the vertex of the figure?​

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Is the 4 picture, o think that is the answer

Let x2
+ 10x = 6.
What values make an equivalent number sentence after completing the square?

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Answer:

3/5 OR 0.6

Step-by-step explanation:

Which inequality has (–2.5, –4.5) as part of the solution set?

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Answer:

the answer is c (x+2)^2/16 + (y+6)^2/16 <1

Step-by-step explanation:

on edge 2021 unit test got it right

Answer:

it c

Step-by-step explanation:

How much is 24% of 78,000

Answers

Answer: 18,720

Step-by-step explanation:

Let's take this equation

78,000(n)

n will equal 0.24, since we are trying to find 24% of 78,000

78,000(0.24)

18,720

Answer:

18720

Step-by-step explanation:

24/100 × 78,000

=18720

Find the area of the shape shown below.
7
3
3

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42 because 3x3=6 and 6x7=42

if you actually know plz give an explanation to the answer so i know you aren't just answering for points, please help this is due before 12:00

Answers

Answer:

B

Step-by-step explanation:

There is a 1/4 probability of getting an A out of a bag with letter MATH

For B) There are two A's our of 8 letters is ADMIRALS.

2/8 is the same as 1/4

The answer is B

A) is wrong because that 1/6

C) is wrong because that's 1/8

D) is wrong because that's 2/9

Answer:

B

Step-by-step explanation:

Probability of finding A in a word =  number of A / number of letters in that word

Probability of finding A in MATH = 1/4

A. Probability of finding A in BECAME = 1/6

B. Probability of finding A in ADMIRALS = 2/8 = 1/4

C. Probability of finding A in USERNAME  = 1/8

D. Probability of finding A in AFTERMATH = 2/9

So we have a match with option B

A rectangle has sides of 9cm by 7.5cm find its perimeter​

Answers

Answer:

33 cm

Step-by-step explanation:

9 cm + 7.5 cm + 9 cm + 7.5 cm

33 cm

Can somebody help please

Answers

what do you need help with??

order the numbers 0.3, 2/5, -0.85, 0.09, 3/4, 3/20 least to greatest​

Answers

Answer:

-0.85, 0.09, 3/20, 0.3, 2/5, 3/4

Step-by-step explanation:

Turn all the fractions into decimals

2/5 -> .4

3/4 -> .75

3/20 -> .15

Then order them

-.85, 0.09, 0.15, 0.3, 0.4, 0.75

Ebony is cutting dough for pastries in her bakery. She needs all the pieces to be congruent triangles and has ensured that EF ON and 2MON is congruent to 2GEF What would
triangles are congruent by AAS?

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Answer:

<EFG and <ONM

Step-by-step explanation:

Tim says 1/8 of this model is shaded. Lucy says 8/8 of this model is shaded.​

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Answer:

Step-by-step explanation: Lucy is correct because all of the squares are filled, and therefore instead of 1 square filled, 8 are, this is why lucy is correct :)

Answer:

Lucy is correct.

Step-by-step explanation:

We can see that the ENTIRE model is shaded ( all eight squares).

So Lucy is correct since she stated that 8 out of 8 (8/8) squares are shaded.

8/8 = 1, so whole.

1/8 would mean that only one out of eight squares is shaded, so Tim is NOT coorrect.

aria is saving to buy a phone.she has 85 dollars and can save an additional 10$ per week how much total money will she have after 8 weeks​

Answers

Answer:

165

Step-by-step explanation:

1. you have to do 10 x 8 bc she makes 10 dollars a week, and it says how much will she make in 8 weeks so you do 10 x 8. 10 x 8 = 80 , so you take the 85 dollars she has then you take the 80 and add them together and you get 165.

Answer:

Answer:$165

Answer:$165Step-by-step explanation:

Answer:$165Step-by-step explanation:She has $85.

Answer:$165Step-by-step explanation:She has $85.She can save $10 per week.

Answer:$165Step-by-step explanation:She has $85.She can save $10 per week.Then,

Answer:$165Step-by-step explanation:She has $85.She can save $10 per week.Then,For 1 week,

Answer:$165Step-by-step explanation:She has $85.She can save $10 per week.Then,For 1 week,She saves $10

Answer:$165Step-by-step explanation:She has $85.She can save $10 per week.Then,For 1 week,She saves $10And, For 8 weeks,

Answer:$165Step-by-step explanation:She has $85.She can save $10 per week.Then,For 1 week,She saves $10And, For 8 weeks,She saves $10×8=$80

Answer:$165Step-by-step explanation:She has $85.She can save $10 per week.Then,For 1 week,She saves $10And, For 8 weeks,She saves $10×8=$80Hence, the total money that she will have after 8 weeks = $85+$80 = $165

Classify the following triangle, Check all that apply A Equilateral B, Acute C. Scalene D. Obtuse E. Isosceles. F.Right



​

Answers

Answer:

D) obtuse

Step-by-step explanation:

Answer:

the answer is D. Obtues

PLEASE HELP WILL GIVE BRAINLIEST!!!QUESTION IS ATTACHED AS PICTURE!!
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Mortys total cost for the items he has purchased : ?
Mortys revenue from the sales : ?
Mortys total profit was : ?

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Answer:

15.00-2500...

20.00+55.00

Can someone help me with this? I am a little confused

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28 .to explain they want to know the missing side and the triangles are equal to each-other just one is projected smaller than the other . So the one with 16 16 and 24 is the smaller one . The difference between 24-16 is 8 . And In the bigger one the sides 20 and 20 where given so since the smaller one is equal to the bigger one you just do 20+8=28

PLEASE ANSWER WITHIN THE NEXT 5 MINUTES!!!!!!! Kara and Steven are biking around a 105 kilometer path. They start biking from the same place, at the same time. Kara bikes at a speed of 15 km/h and Steven bikes at a speed of 30 km/h. How long will it take Steven to be at the same place at the same time with kara.

Answers

Step-by-step explanation:

105/30=3.5 hours for steven

105/15=7 hours for Kara.

they would be b at the same place in 7 hours when Kara catches up at 105km lol

Answer:

7 hrs

Step-by-step explanation:

SEE THE IMAGE FOR SOLUTION

HOPE IT HELPS

HAVE A GREAT DAY

Help will give brainly of aw ser is right

Answers

Answer:

40 is your answer:)

Step-by-step explanation:

4x3= 12

12/2=6

6x4=24

4x4=16

24+16= 40

what is the expression for one-sixth of the sum of 7 and s plus the product of 2 and q

Answers

Answer:

= [tex]\frac{1}{6}[/tex] (7 + s) + ( 2 × q )

I'm pretty much sure that this is correct.

Evaporation and Transpiration
Terminology
- Evaporation - process by which liquid water
passes directly to the vapor phase
Transpiration - process by which liquid water
passes from liquid to vapor through plant
metabolism.​

Answers

Answer:

well done

Step-by-step explanation:

Evaporation and transpiration terminology

A child weighing 59 lb has a bad infection and is to be given Cefaclor.
The dosage is 15 mg per kg.
The drug will be delivered in an oral suspension with concentration 250 mg/5 mL.
How many mL will she receive?
Round to the nearest whole number.
You will need to convert her weight to kg, using 1 kg = 2.2 lb.

Answers

Answer:

Step-by-step explanation:

59:2,2=26,81

15*26,81:250=1,6086

What is the solution to this equation?
325 + 12 = 39

Answers

Answer:

there is no solution to it as the equation isn't true (It doesn't make sense)

Step-by-step explanation:

Step-by-step explanation:

325 + 12 =

325 + 12 = 337

Answer: 337

So this means it isn´t 39

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