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HACTEHA [7]
3 years ago
9

Noel's club wants to purchase 8 chairs for their meeting room. The original cost for each chair was $18.99. The chairs are now o

n sale for 10% off. How much will Noel's club save if they buy the 8 chairs on sale? Which answer gives the correct solution and explains how to check if the answer is reasonable? A. Solution: $80 Explanation: If the club paid full price for the 8 chairs, they would pay about $20 for each chair. Since the chairs were 10% off, the club would pay $10 for each chair ($20 - $10). That means they would save about 8 × $10 or $80. B. Solution: $15.20 Explanation: If the club paid full price for the 8 chairs, they would pay about $160 (8 × $20). Since the chairs were 10% off, that means the club would save about 0.10 × $160 or about $16. C. Solution: $71.92 Since the original price for each chair was about $19, the club would save about $9 per chair ($19 – $10). For all 8 chairs the club would save 8 × $9 or $72.
Mathematics
1 answer:
Dmitriy789 [7]3 years ago
7 0
I'm not 100% certain but i'm 45% certain that it's A.
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Answer:

D. -4, -1, and 5

Step-by-step explanation:

X-intercepts are the values where your graph (function) crosses the x-axis.

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7 0
3 years ago
b) If parametric equations of a flow line are x = x(t), y = y(t), explain why these functions satisfy the differential equations
sineoko [7]

Answer:

The equation of the the flow line that passes through the point (x, y) = (−1, −1) is

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Step-by-step explanation:

The pathline equation for a vector field is given by F(x,y) = xî - yj

The velocity vector field for the streamline of the flow is given by

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From the question, it is given that

(dx/dt) = x

(dy/dt) = -y

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V(x, y) = xî - yj

which coincides with the pathline vector field of the flow.

The only time the pathline and streamline vector field coincide and have the same equation is when the flow is a steady state flow.

That is, the properties of the fluid flowing isn't changing with time!

Hence, this flow is a steady state flow!

We're told to solve the differential equation.

(dx/dt) = x

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but

(dy/dx) = (dy/dt) × (dt/dx)

(dy/dx) = -y/x

(dy/y) = -(dx/x)

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where c is the constant of integration

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In (xy) = c

Inserting the values of (x, y) given in the question,

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0 = c

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In y + In x = 0

In (yx) = 0

xy = e⁰ = 1

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So, the equation of the the flow line that passes through the point (x, y) = (−1, −1) is

In y + In x = 0 or in another form, xy = 1

Hope this Helps!!!

4 0
3 years ago
19. Matt has already sold $72 worth of tickets to the
natulia [17]

Answer: This is a function, since it's considered to be able to be made into a word problem

Step-by-step explanation:

5 0
2 years ago
Help me please I literally don’t understand any of this. I know it’s easy too.
Ber [7]

Holigina, this is the solution:

Let's recall that √x = x ^(1/2)

Therefore,

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The correct answer is C. 1

5 0
1 year ago
Please help! Will give brainliest. 15 points
Leokris [45]

Answer:

See Explanation

Step-by-step explanation:

In\: \triangle ABD \: \&\: \triangle ACB\\\angle BAD \cong \angle CAB... (common \: \angle 's) \\\angle ABD \cong \angle ACB... (each\: 45\degree) \\\therefore \triangle ABD \: \sim\: \triangle ACB... (By\: AA\: postulate) \\

6 0
3 years ago
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