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
alexdok [17]
3 years ago
15

If f(x)= 3 over x+2- square root x-3 f(19)=

Mathematics
1 answer:
PSYCHO15rus [73]3 years ago
4 0
F(19)= (3/(19+2)) - sqrt(19-3)
= (3/21) - sqrt(16)
= (1/7) - 4
= (1/7) - (28/7)
= -27/7
= - 3 6/7
You might be interested in
what is the answer to this question. please respond. I need the answer very quick.my teacher is going to get mad at me
amm1812

It is a ratio problem...

2 dogs need 144 feet = 2 : 144

Simplify the ratio = 1 : 72

Multiply both sides by 8 (8 dogs) = 1*8 :144*8

Simplify the ratio = 8 : 1152

8 dogs need 1152 feet of fencing

Hope this helps!

3 0
3 years ago
5x+50/x+5 times 1/x+10
Alecsey [184]

Answer:

Step-by-step explanation:

Simplify the expression.

5

(

x

2

+

2

x

+

11

)

x

3 0
3 years ago
What value of x makes this equation true? 7x -14=35
Anna35 [415]

Answer:

7x -14=35        add 14 on both sides

7x= 49        then, divide 7 on the whole equation

<u>x=7</u>

5 0
3 years ago
Read 2 more answers
(1 point) A fish tank initially contains 15 liters of pure water. Brine of constant, but unknown, concentration of salt is flowi
Drupady [299]

Answer:

a. \dfrac{dx}{dt} = 6\frac{2}{3} \cdot c

b. x(t) = 6\frac{2}{3} \cdot c \cdot t

c. c  = \dfrac{3}{8}  \ g/L

Step-by-step explanation:

a. The volume of water initially in the fish tank = 15 liters

The volume of brine added per minute = 5 liters per minute

The rate at which the mixture is drained = 5 liters per minute

The amount of salt in the fish tank after t minutes = x

Where the volume of water with x grams of salt = 15 liters

dx =  (5·c - 5·c/3)×dt = 20/3·c = 6\frac{2}{3} \cdot c \cdot dt

\dfrac{dx}{dt} = 6\frac{2}{3} \cdot c

b. The amount of salt, x after t minutes is given by the relation

\dfrac{dx}{dt} = 6\frac{2}{3} \cdot c

dx = 6\frac{2}{3} \cdot c \cdot dt

x(t) = \int\limits \, dx  = \int\limits \left ( 6\frac{2}{3} \cdot c \right) \cdot dt

x(t) = 6\frac{2}{3} \cdot c \cdot t

c. Given that in 10 minutes, the amount of salt in the tank = 25 grams, and the volume is 15 liters, we have;

x(10) = 25 \ grams(15 \ in \ liters) = 6\frac{2}{3} \times c \times 10

6\frac{2}{3} \times c  =\dfrac{25 \ grams }{10}

c  =\dfrac{25 \ g/L }{10 \times 6\frac{2}{3} }  = \dfrac{25 \ g/L}{10 \times \dfrac{20}{3} } =\dfrac{3}{200} \times 25 \ g/L= \dfrac{75}{200}  \ g/L = \dfrac{3}{8}  \ g/L

c  = \dfrac{3}{8}  \ g/L

4 0
2 years ago
Anastasia was trying to decide which investment plan would be best over 10 years. Bank A was offering 8.5% simple interest on he
Irina-Kira [14]
A
2,000×(1+0.085×10)
=3,700
B
2,000×(1+0.08)^(10)
=4,317.85
Bank B is the better investment. In 10 years, her $2,000 will grow to $4,317.85, and with bank A, her $2,000 will grow to $3,700
4 0
2 years ago
Other questions:
  • Joe’s rectangular garden is 6 meters long and 4 meters wide. He wishes to double the are of his garden by increasing its length
    12·1 answer
  • Ana runs 3/4 miles in 6 minutes or 1/10 hour. What is her spores in miles per hour?
    6·1 answer
  • ~PLEASE HELP ASAP OFFERING 10 POINTS~
    11·1 answer
  • What is the distance from (-2,4) to (0,-6)? Round your answer to the nearest hundredth.
    5·2 answers
  • A landscaping crew can mulch 3
    14·1 answer
  • Round your answer to the nearest hundredth.<br><br> HELPPPP
    8·1 answer
  • How do you write the circumference of the circle in terms on 几
    5·1 answer
  • What direction will this object accelerate? Please give me an explanation as well I will be marking brainiest (NO LINKS)
    6·2 answers
  • A tea infuser in the shape of a right rectangular pyramid is 7.9 cm tall and has a base 3 cm long and 1.5 cm wide. To make the b
    11·1 answer
  • Write using algebra.
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!