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
stepladder [879]
3 years ago
7

4/15 + 7/9 what is the sum

Mathematics
1 answer:
SCORPION-xisa [38]3 years ago
7 0

Answer:

54/45 = 1 1/5 - one and one fifth

Step-by-step explanation:

You might be interested in
Please help on a timer WILL MARK BRAINLIEST
viva [34]

Answer:

3

Step-by-step explanation:

s + 8 > 10

    -8    -8

      s > 2

    (3) > 2

    8+3=11

   11 > 10

6 0
2 years ago
Read 2 more answers
What is 3/4y=7/8 answer for what is y
ANTONII [103]

y = 7/6.....................

5 0
2 years ago
Leroi and Sylvia both put $100 in a savings account. Leroi decides he will put in an additional $10 each week. Sylvia decides to
Nimfa-mama [501]
Sylvia puts in $121.

10% of (multiply) $210.
210= 100 each person plus an additional ten from Leroi
so .10*210 = $21. 
Add Sylvia's $100 plus $21 and viola, $121

6 0
3 years ago
What is the probability of having 3 children that are all boys?
olganol [36]
So you have a 50% chance to have a boy vs a girl (1/2). If you want 3 children, that would be 1/3*1/2= 1/6 or 16.67% chance
5 0
3 years ago
the half life of c14 is 5730 years. Suppose that wood found at an archeological excavation site contains about 35% as much C14 a
Furkat [3]

Answer:

The wood was cut approximately 8679 years ago.

Step-by-step explanation:

At first we assume that examination occured in 2020. The decay of radioactive isotopes are represented by the following ordinary differential equation:

\frac{dm}{dt} = -\frac{m}{\tau} (Eq. 1)

Where:

\frac{dm}{dt} - First derivative of mass in time, measured in miligrams per year.

\tau - Time constant, measured in years.

m - Mass of the radioactive isotope, measured in miligrams.

Now we obtain the solution of this differential equation:

\int {\frac{dm}{m} } = -\frac{1}{\tau}\int dt

\ln m = -\frac{1}{\tau} + C

m(t) = m_{o}\cdot e^{-\frac{t}{\tau} } (Eq. 2)

Where:

m_{o} - Initial mass of isotope, measured in miligrams.

t - Time, measured in years.

And time is cleared within the equation:

t = -\tau \cdot \ln \left[\frac{m(t)}{m_{o}} \right]

Then, time constant can be found as a function of half-life:

\tau = \frac{t_{1/2}}{\ln 2} (Eq. 3)

If we know that t_{1/2} = 5730\,yr and \frac{m(t)}{m_{o}} = 0.35, then:

\tau = \frac{5730\,yr}{\ln 2}

\tau \approx 8266.643\,yr

t = -(8266.643\,yr)\cdot \ln 0.35

t \approx 8678.505\,yr

The wood was cut approximately 8679 years ago.

5 0
3 years ago
Other questions:
  • Solve for the area of ΔABC to the nearest tenth. A) 9.0 cm2 B) 18.1 cm2 C) 36.2 cm2 D) 72.4 cm2
    8·1 answer
  • I need the answer to 10
    7·1 answer
  • Convert the scale to a unit rate. 1/4 in = 3/4 mi
    6·1 answer
  • IISLUCIO
    11·1 answer
  • A family of 6 is visiting a mall. The mall has 10 exit doors. Assume random selection. Find the probability that
    6·1 answer
  • Describe a method other than the one used in the example that you could use to find a
    15·2 answers
  • What is the solution to x?​
    11·1 answer
  • Ryan worked 40 hours last week. He had $74 deducted from his earnings for taxes. If he had $286 left after the deduction, whats
    7·2 answers
  • Please I need help on this problem this assignment due tomorrow!!!!!!! be brainliest if help me
    9·1 answer
  • : the mass of an average classroom meter stick is roughly 0. 2 kg.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!