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Shkiper50 [21]
3 years ago
14

Can you help me do this pls thx and sum thing i got for Easter

Mathematics
1 answer:
telo118 [61]3 years ago
6 0

Answer:

1. D.40%

2. C. 25%

3. C.36

4. 6

5. 24

6. ABOUT 78%

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Combine, and simplify the following radical expressions:<br><br> √7-5/√7+√8
solmaris [256]

\frac{\sqrt{7}-5}{\sqrt{7}+\sqrt{8}}

Rationalize.

-7+2\sqrt{14}+5\sqrt{7}-10\sqrt{2}

This can be further simplified to the decimal:

-0.43006...

I hope this helps :)

7 0
4 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
3 years ago
Is w = 9 a solution to the equation 14 - w = 23?
Len [333]

Answer:

No

Step-by-step explanation:

14 - 9 = 3

3 < 23

6 0
3 years ago
Read 2 more answers
Cam has a piece of plywood that is 6 7/8 feet wide. He is going to cut shelves from the plywood that are each 1 1/6 feet wide. W
jeyben [28]
6 7/8= 55/8
6 1/6= 7/6
first find common denominators
55/8 * 3= 165/24
7/6 * 4= 28/24
165/24 divided by 28/24 is the same as 165/24 time 24/28
so that equals 3960/672
which equals 5.8928
so estimates about 5 shelves<span />
7 0
3 years ago
Read 2 more answers
!!!!!!!Please help!!!!!!!!!
Sauron [17]

Answer:

(-2, 0.25)

(-1, 0.5)

(0, 1)

(1, 2)

(2, 4)

Those are the points. I just plugged each x value into the equation to get the y value. Hope it helps!

8 0
4 years ago
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