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3 years ago

Need help :_: anyone can help me?

Mathematics

1 answer:

AlladinOne [14]3 years ago

3 0

4 2/3 = 14 feet. i hope this helps because i try and for the mixed number i don't know

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What is the area of this triangle?

Contact [7]

Answer: 43.5

Step-by-step explanation:

$A=\frac{1}{2}(8)(12)(\sin 65^{\circ}) \approx \boxed{43.5}$

6 0

2 years ago

Kevin and is father have collected 1,456 different coins over the years. They have a coin album that holds 3 coins on a page. If

quester [9]

Answer:

486 pages

Step-by-step explanation:

1456/3 = 485.33333333, but you have to round up so 486

3 0

3 years ago

Select the correct answer.

Citrus2011 [14]

Yo sup??

4x+5y=-9

y=(-4x)/5-9/5

we see that this is of the form y=mx+c

where m is the slope

therefore the slope of the line is -4/5

To find y intercept, put x=0

y=-4*0/5-9/5

y=-9/5

Therefore y intercept is -9/5

Hope this helps.

5 0

2 years ago

What is the akis of symmetry <br> y=2x^2-8x+1

nika2105 [10]

Answer:

Step-by-step explanation:

5 0

3 years ago

A tank contains 1000 L of pure water. Brine that contains 0.05 kg of salt per liter of water enters the tank at a rate of 5 L/mi

Margaret [11]

Answer:

a) $y(t)=0.65\frac{Kg}{min}(tmin)$

b) $y(40)=26Kg$

Step-by-step explanation:

Data

Brine a (Ba)

$V_{Ba}=5\frac{Lt}{min}\\ Concentration(Bca)=0.05\frac{Kg}{Lt}$

Brine b (Bb)

$V_{Bb}=10\frac{Lt}{min}\\ Concentration(Bcb)=0.04\frac{Kg}{Lt}$

we have that per every minute the amount of solution that enters the tank is the same as the one that leaves the tank (15 Lt / min)

, then the amount of salt (y) left in the tank after (t) minutes: $y=V_{Ba}*B_{ca}+V_{Bb}*B_{cb}=5\frac{Lt}{min}*0.05\frac{Kg}{Lt}+10\frac{Lt}{min}*0.04\frac{Kg}{Lt}=\\0.25\frac{Kg}{min}+0.4\frac{Kg}{min}=0.65\frac{Kg}{min}$

Finally:

a) $y(t)=0.65\frac{Kg}{min}(tmin)$

b) $y(40)=0.65\frac{Kg}{min}(40min)=26Kg$

being y(t) the amount of salt (y) per unit of time (t)

5 0

3 years ago