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
worty [1.4K]
3 years ago
10

Mark is 11 years older than his sister. in 8 years he will be twice as old as she will be then.How old are they now

Mathematics
1 answer:
earnstyle [38]3 years ago
6 0
X=Marks sister's age
x+11= Marks age
x+11 +8 = 2x+8
x+19=2x +8
x+19-x=2x-x +8
19-8=x+8-8
11=x Marks sisters age in 8 years
11-8= 3 Marks sisters age now
x+11=22 Marks age in 8 years
22-8= 14 Marks age now

You might be interested in
Color blindness is an inherited characteristic that is more common in males than females. Let F represent female, and C represen
malfutka [58]

Answer:

0.513 = 51.3% probability of being a female.

Step-by-step explanation:

We are given the following formula:

P(F \cup C) = P(F) + P(C) - P(F \cap C)

In which:

Event F: Female

Event C: Red-green color blindness.

Probability of a Female

We have to find P(F), which is given by:

P(F) = P(F \cup C) + P(F \cap C) - P(C)

We are given by:

P(C) = 0.039, P(F \cap C) = 0.004, P(F \cup C) = 0.548

So

P(F) = P(F \cup C) + P(F \cap C) - P(C) = 0.548 + 0.004 - 0.039 = 0.513

0.513 = 51.3% probability of being a female.

5 0
3 years ago
Help me with this math
Inessa05 [86]

Answer:

x= 35° hope this helps!!!

3 0
3 years ago
Read 2 more answers
How many degrees in each side of an equilateral polygon with 6 sides?
9966 [12]
If the total is 360 degrees then it will take 50 degrees each side. If the total is 180 degrees it would be 30 degrees each side
8 0
4 years ago
Find f. f ''(x) = −2 + 24x − 12x2, f(0) = 7, f '(0) = 16
miskamm [114]
Integrate twice.

Remember the anti-derivative rule for polynomials:
\int x^n dx = \frac{x^{n+1}}{n+1} + C

f'(x) = \int (-2 +24x -12x^2) dx = -2x + 12x^2 -4x^3 + C \\  \\ f'(0) = 16, C = 16 \\  \\ f(x) = \int (16 -2x+12x^2-4x^3) dx = 16x -x^2 + 4x^3 - x^4 + C \\  \\ f(0) = 7, C = 7

Answer:
f(x) = 7 + 16x -x^2 + 4x^3 - x^4
3 0
4 years ago
Find the product or type<br> "impossible".<br> [2 6 -7][5 -2 4]
Hatshy [7]

The value of (26 - 7) and (5 - 24) when they're multiplied will be -399.

<h3>How to multiply the values?</h3>

From the information given, we are told to multiply (26 - 7) and (5 - 24). This goes thus:

= (26 - 7) × (5 - 24)

= 21 × -19

= -399

In this case, value of (26 - 7) and (5 - 24) when they're multiplied will be -399.

Learn more about multiplication on:

brainly.com/question/10873737

#SPJ1

5 0
2 years ago
Other questions:
  • HELP PLEASE!
    13·2 answers
  • alice has eight good behavior stars and earns a new one each week. Mack has two good behavior stars and earns two new ones each
    9·2 answers
  • Solve 9x^2 + 12x – 24 = 0 using the quadratic formula.
    13·1 answer
  • Can I get an answer please ​
    7·2 answers
  • A class contribuated $3.50 in nickels and dimes to the red cross. in all there were 45 coins how many were there of each kind
    8·1 answer
  • The height h (in feet) of an object dropped from a ledge after x seconds can be modeled by h(x)=−16x2+4. The object is dropped a
    7·1 answer
  • Please help and thanks
    6·1 answer
  • Converting Repeating Decimals To Fractions
    10·1 answer
  • Which type of parent function is f(x) =^3cubed x
    5·1 answer
  • The cost of 8 pounds of watermelon is $19.60. How many pounds of watermelon can a
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!