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
Anton [14]
3 years ago
6

4. Elena noticed that, nine years ago, her cousin Katie was twice as old as Elena was then,

Mathematics
1 answer:
kakasveta [241]3 years ago
4 0

Answer:

k - 2e + 9 = 0

k - e - 4 = 0

Step-by-step explanation:

Given that Elena is currently e years  old and Katie is k years old. Now, nine years ago, Katie was twice as old as Elena was.

So, k - 9 = 2(e - 9)

⇒ k - 2e + 9 = 0 .............. (1)

And, in four years, Elena will be as old as Katie is now.

So, k = e + 4

⇒ k - e - 4 = 0 ............... (2)

Therefore, the equations (1) and (2) matches the conditions. (Answer)

You might be interested in
Mark is taking pledges for bike-a-thon fundraiser. John pledged $2.00, plus $1.75 for each mile Mark bikes. Kiara pledged $5.25,
Shkiper50 [21]

Answer:

The equation for the amount of dollars pledged in total is f(M) = 2.00M + 7.25, and the amount for just Kiara is f(M) = 0.25M + 5.25

Step-by-step explanation:

The amount they pledge up front is a constant and therefore need to be added to the end of the equation. The amount per mile should be a variable amount. This gets multiplied by the M variable. So we start with the Kiara amount.

0.25 per mile = 0.25M

5.25 pledged = 5.25

Now put them together to get f(M) = 0.25M + 5.25

Do the same with Mark.

1.75 per mile = 1.75M

2.00 pledged = 2.00

Now put them together to get f(M) = 1.75M + 2.00

To get the final total, we add both equations together.

f(M) =  0.25M + 5.25 + 1.75M + 2.00

f(M) = 2.00M + 7.25

4 0
3 years ago
Which postulate can be used to prove that two triangles are congruent
user100 [1]
Side-Side-Side Theorem, Side-Angle-Side, Angle-Angle-Side, Angle-Side-Angle, and Hypotenuse-Leg for right triangles. 

For example, for Side-Side-Side, if you prove all 3 sides of the triangle are congruent, then the triangle is congruent. 
3 0
3 years ago
A die is rolled. The set of equally likely outcomes is {1, 2, 3, 4, 5, 6}. Find the probability of getting a 6.
babymother [125]

Answer:

1/6

Step-by-step explanation:

5 0
3 years ago
Dwayne starts at the surface of the water and swims to -25 feet. From there he swims +10 feet to see the fish and then back down
d1i1m1o1n [39]
(-25) + 10 + (-5) = -20 feet is his current position. To reach zero, he should add 20 feet to his altitude.
7 0
3 years ago
A $150 Chrome book is on sale for 20% off. How much should you pay for the chrome book
AlladinOne [14]

Answer:

$30

Step-by-step explanation:

8 0
2 years ago
Other questions:
  • Question part points submissions used consider the following. g(x)={((x**2-a**2)/(x-a) text(if ) x != a,4 text(if ) x =
    9·1 answer
  • PLEASE HELPPPP, Graph the equations using slope intercept form. y = -3x + 8
    15·1 answer
  • S^4x = 27^x - 3<br> What is the value of x?
    10·1 answer
  • Solve the equation.<br><br> –3x + 1 + 10x = x + 4<br><br> x = 1/2<br> x = 5/6<br> x = 12<br> x = 18
    13·2 answers
  • 14. Find the greatest common factor (GCF) of 45xy^2? and -60y.
    5·1 answer
  • A bridge constructed over a bayou has a supporting arch in the shape of an inverted parabola. Find the equation of the parabolic
    12·1 answer
  • There are 50 seashells on the beach. After one week there are 120 seashells on the beach. If this same pattern continues how man
    7·2 answers
  • Which measurement is not equivalent to the others?
    7·1 answer
  • Classify each special right triangle in the length ratio of (Side1 : Side2 : hypotenuse)
    7·1 answer
  • Christian buys a 3500 computer using an installment plan that requires 17% down and a 3.7 interest rate how much is his down pay
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!