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
Mashcka [7]
2 years ago
13

The total age of two sisters is 108 years

Mathematics
1 answer:
tester [92]2 years ago
6 0

Answer:

7 : 5

Step-by-step explanation:

let the age of the younger be x , then the older is x + 18, thus

x + x + 18 = 108, that is

2x + 18 = 108 ( subtract 18 from both sides )

2x = 90 ( divide both sides by 2 )

x = 45

Thus younger is 45 and older is 45 + 18 = 63

ratio older : younger = 63 : 45 = 7 : 5

You might be interested in
Can Someone Help. ?
Elanso [62]

Answer:

6

Step-by-step explanation:

I think its 6 times greater because the length was tripled and the width was doubled thus : 3 * 2 = 6

HOPE THIS HELPED

8 0
2 years ago
A business executive bought 40 stamps for
alekssr [168]

Answer:

32 33-cent stamps, 8 23-cent stamps

Step-by-step explanation:

In order to solve this question, we need to set up a system of equations. Also known as solving for two variables (the number of each stamp).

Let's set x to be the number of 33-cent stamps. Similarly, let's set y to be the number of 23-cent stamps.

To make our first equation, let's think about the number of stamps total we have. We can say:

x + y =40

<em>(AKA - The number of 33-cent stamps, plus the number of 23-cent stamps, equals 40 stamps.)</em>

Now, let's make an equation for the cost of these stamps.

0.33x + 0.23y = 12.40

<em>(AKA - The cost of the stamps in total, should equal $12.40).</em>

So now, we have our two equations:

x + y =40\\0.33x+0.23y=12.40

If you have a TI-84 graphing calculator, you can go to apps -> polysmlt2 -> simultaneous eqn solver, and then input these equations into the menu. This will solve the problem for you.

If you need to do this manually, let's use substitution. Condense our first equation to make it more substitutable.

x+y=40\\x=40-y

Now, let's put this into our second equation.

0.33x+0.23y=12.40\\0.33(40-y)+0.23y=12.40

Distribute, and solve for y.

13.2-0.33y +0.23y =12.40\\13.2-0.1y=12.40\\-0.1y=-0.8\\y=8

Now, we plug this into one of our equations.

x+y=40\\x+8=40\\x=32

In the end, we have thirty-two 33-cent stamps, and eight 23-cent stamps.

3 0
1 year ago
You have $60 and your sister has $120. You are saving $14 per week and your sister is saving $10 per week. How long will it be b
tigry1 [53]

Answer:

15 weeks

The amount of money is  270

Step-by-step explanation:

You: 60 +14x

Sister: 120+10x

Set them equal to each other

60+14x = 120+10x

Subtract 10x from each side

60+4x= 120

Subtract 60 from each side

4x= 60

Divide by 4

4x/4 = 60/4

x = 15

15 weeks

The amount of money is 120+10*15 = 120+150 = 270

3 0
3 years ago
Read 2 more answers
What math terms is -3 categories in
oksian1 [2.3K]
Idek i need points man
4 0
3 years ago
Mark wrote the highest score he made on his new video game as the product of 70 X 6000. Use the Associative and Commutative Prop
sesenic [268]
I think in commutative properties of multiplication:
70 x 6000 = 70 x 6000
420,000   =  420,000

I don't know associative properties, only commutative properties. Sorry :(
3 0
3 years ago
Read 2 more answers
Other questions:
  • Josie tells her clients to drink water when training. Drink 500 mL two hours before a training session. Drink 250 mL at the star
    8·1 answer
  • 14 percent of 81 is what number?
    8·2 answers
  • What is the next term in the sequence below?<br><br> 1/2, 2/6, 3/18, 4/54, ____
    14·1 answer
  • 30 points + Brainliest.<br> Answers are:<br><br> A. 6<br> B. 9<br> C. 12<br> D. 8
    11·1 answer
  • Write the ratio of 14 and 18 in its lowest terms
    11·2 answers
  • Make the Fraction into a Decimal square route 81 over 100
    7·1 answer
  • 5) 5 ft<br> A) 38 ft<br> C) 18 ft<br> B) 15<br> D) 16 ft
    12·1 answer
  • In a Gallup Poll in 2003, 590 of 1,116 randomly selected adults aged 18 and older said they had too little time for relaxing or
    6·1 answer
  • What’s the square root of 45?
    10·2 answers
  • Which graph shows a function whose inverse is also a function?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!