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3 years ago

12

You need to mix a solution that is 70% anti-freeze with one that is 30% anti-freeze to obtain 20 L of a mixture that 60% anti-fr

eeze. How many liters of each of the solutions must be used?

1 answer:

RoseWind [281]3 years ago

6 0

solutionwith 70% anti freeze=14l

solution with 30% anti freeze=5l

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AB is tangent to circle O at A. The diagram is not drawn to scale. if AO=21 and BC=14, what is AB?

barxatty [35]

Ab would equal to 7 using tringle steps

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3 years ago

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Given a right prism where p is the perimeter of the base, h is the height, BA is the area of the bases, and LA is the lateral ar

Ymorist [56]

Let
<span>p ----------------> is the perimeter of the base
</span><span>h ---------------> is the height
</span><span>BA-------------> is the area of the bases
</span><span>LA--------------> is the lateral area

we know that surface area is </span><span>the sum of base areas plus lateral areas
</span><span>then
SA=[BA]+P*h
but remember that
LA=P*h
then
SA=</span>[BA]+LA----------> SA=BA+LA

the answer are the options B.) SA=BA+LA and the option D.) SA=BA+ph

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3 years ago

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1. This composite figure is created by placing a sector of a circle on a rectangle. What is the area of this composite figure? S

White raven [17]

Answer:

29.92 m² (nearest hundredth)

Step-by-step explanation:

$\textsf{Area of a sector}=\dfrac{\theta}{360\textdegree}\pi r^2$

$\implies \textsf{area}=\dfrac{30}{360\textdegree}\pi \cdot 5.5^2=\dfrac{121}{48}\pi \textsf{ m}^2$

Area of rectangle = width × length

⇒ area = 4 × 5.5 = 22 m²

Total area = area of sector + area of rectangle

⇒ total area = $\dfrac{121}{48}\pi +22$ = 29.91943148... = 29.92 m² (nearest hundredth)

6 0

2 years ago

I need help with this pls

Alexxx [7]

Hello!

<u>What is an x-intercept</u>:

⇒ <em>value of x</em> when the <em>value of y</em> equals '0'

$8x + 5y=25\\8x+5(0)=25\\8x=25\\\\x=\dfrac{25}{8}$

x-intercept is <u>25/8</u>

<u></u>

<u></u>

<u>What is a y-intercept:</u>

⇒ <em>value of y</em> when the <em>value of x</em> equals '0'

$8x+5y=25\\8(0)+5y=25\\5y=25\\y=5$

y-intercept is <u>5</u>

<u></u>

Hope that helps!

<u />

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1 year ago

Bad White [126]

Answer:

I think 14 days

Step-by-step explanation:

If 4 workers can do the task in 12 days then I should be able to complete the task in 4 time's 12 days. 6 workers should be able to complete the task in 4 times 12 divided 6.

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3 years ago