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
marta [7]
3 years ago
11

Please answer and thank you very much if u do

Mathematics
2 answers:
Anastaziya [24]3 years ago
5 0

Answer:

c. 10\frac{17}{18}

Step-by-step explanation:

-4\frac{5}{6} + 15\frac{7}{9}

Change to improper fractions.

\\-4\frac{5}{6} = -\frac{29}{6} \\

Multiply the whole number by the denominator and add that to the numerator.

15\frac{7}{9} =  \frac{142}{9}

Multiply the whole number by the denominator and add that to the numerator.

-\frac{29}{6} + \frac{142}{9}

6: 6, 12, 18\\9: 9, 18

Find a common denominator.

-\frac{29}{6} * 3 = -\frac{87}{18} \\\\\frac{142}{9} * 2 = \frac{284}{18} \\\\-\frac{87}{18} + \frac{284}{18}

-\frac{87}{18} + \frac{284}{18} = \frac{197}{18}

Add

10\frac{17}{18}

Simplify

I hope this helps! May I please have brainliest? :)

ycow [4]3 years ago
4 0
10 17/18 is the answer so it’s C
You might be interested in
Which is the correct answer and pls explain why
Elina [12.6K]
I think n2+2
and i don’t really know how to explain
7 0
3 years ago
I need helpppppppppppp
ratelena [41]
The answer to question 3 is D. 15(4a+3). And the answer to question 4 is A. 90. Have a great day
7 0
3 years ago
Simplify each expression<br><br> 1. 5 + 3 (x - 5) + 7 <br><br> 2. 1/2+2/3(y- 6)
exis [7]

Answer:

3(x-1)

Step-by-step explanation:

12+3x-15

-3+3x

3(x-1)

8 0
3 years ago
Read 2 more answers
If a substance decays at a rate of 25% every 10 years, how long will it take 512 grams of the substance to decay to 121.5 grams
Juliette [100K]

Answer:

It will take 50 years to decay from 512 grams to 121.5 grams.

Step-by-step explanation:

The decay formula :

N=N_0e^{-\lambda t}

where

N= amount of substance after t time

N₀= initial of substance

t= time.

A substance decays at a rate 25% every 10 years.

So, remaining amount of the substance is = (100%-25%)= 75%

\frac{N}{N_0}=\frac{75\%}{100\%}=\frac{75}{100}=\frac34, t= 10

N=N_0e^{-\lambda t}

\Rightarrow \frac {N}{N_0}=e^{-\lambda t}

\Rightarrow \frac34 =e^{-\lambda .10}

Taking ln both sides

\Rightarrow ln|\frac34| =ln|e^{-\lambda .10}|

\Rightarrow ln|\frac34|=-10\lambda

\Rightarrow \lambda=\frac{ ln|\frac34|}{-10}

Now , N₀= 512 grams, N= 121.5 grams, t=?

N=N_0e^{-\lambda t}

\therefore 121.5=512e^{-\frac{ln|\frac34|}{-10}.t}

\Rightarrow 121.5=512e^{\frac{ln|\frac34|}{10}.t}

\Rightarrow \frac{121.5}{512}=e^{\frac{ln|\frac34|}{10}.t}

Taking ln both sides

\Rightarrow ln|\frac{121.5}{512}|=ln|e^{\frac{ln|\frac34|}{10}.t}|

\Rightarrow ln|\frac{121.5}{512}|={\frac{ln|\frac34|}{10}.t}

\Rightarrow t=\frac{ln|\frac{121.5}{512}|}{\frac{ln|\frac34|}{10}}

\Rightarrow t=\frac{10.ln|\frac{121.5}{512}|}{{ln|\frac34|}}

⇒t=50 years

It will take 50 years to decay from 512 grams to 121.5 grams.

8 0
3 years ago
Does anyone know the answer for this?​
Phoenix [80]
Slope is 1
Y-int is 7
5 0
3 years ago
Other questions:
  • The point where the two sides of an angle meet, or where the edges of a three-dimensional intersect.
    12·1 answer
  • Write the equation of the line in slope-intercept form that has the following points: (1, -3)(0, -5)
    13·1 answer
  • Kathy's science book is 1 1/6 inches thick. Her reading book is 1 3/8 inches thick. How much thicker is her reading book than he
    13·1 answer
  • She needs 1/4 cup of butter for each cake. one stick of butter is 1/2 cup. how many sticks of butter does she need to make 4 cak
    7·1 answer
  • 5w 2-6 + 11 help pls​
    10·1 answer
  • A random sample of 49 measurements from a population with population standard deviation σ1 = 4 had a sample mean of x1 = 11. An
    15·1 answer
  • NO LINKS!!!! REAL ANSWER! 50 points! PLEASE!!!!! I've been here for an hour!!!!
    6·2 answers
  • 29 thanks and no links or you get reported
    7·1 answer
  • Find the value of x<br> 85<br> (X + 37)<br> (6x + 22)<br> 69
    7·1 answer
  • Can someone please explain how the answer to this is, "19 and 3", "1 and 12"
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!