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3 years ago

2. Solve for x: 8(1-x) = 4(3x + 1)

Mathematics

2 answers:

Zigmanuir [339]3 years ago

8 0

The answer to your question is x = 1/5

ruslelena [56]3 years ago

6 0

Answer:

Brianliest!

Step-by-step explanation:

8-8x = 12x+4

20x = 4

x = 4/20

x = 1/5

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1. You can finish 9 math problems in 20/3 minutes. What is your unit rate of problems per minute?

MArishka [77]

Where is the question to this or is this the answer

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3 years ago

A dome of a building is in the form of a hemisphere from inside it was whitewashed at the cost of rupees 4989.60 if the cost of

Luda [366]

Answer: $249.48\ m^2; 369.168\ m^3$

Step-by-step explanation:

Given

Cost of white-washing =Rs. 4989.60

Rate =20 per meter square

So, inside area of = $\dfrac{4989.60}{20}=249.48\ m^2$

The surface area of dome= $4\pi\ r^2=249.48$

$4\times 3.142\times r^2=249.48\\r^2=\frac{249.48}{4\times 3.142}=19.85\\r=4.455\ m$

The volume of air in the dome $V=\frac{4}{3}\pi r^3$

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6 0

3 years ago

The variable z is inversely proportional to x. When x is 16, z has the value 0.875. What is the value of z when x= 21?

ziro4ka [17]

For $z$ and $x$ to be inversely proportional, there must be some constant $k$ such that

$zx=k$

Given that $z=0.875$ when $x=16$ , it follows that

$0.875\cdot16=k\implies k=14$

Then when $x=21$ , we have

$21z=14\implies z=\dfrac{14}{21}=\approx0.667$

8 0

3 years ago

Which statement is true about the prime polynomial 2x^2+3x+3?

Bezzdna [24]

Answer: It cannot be modeled with a rectangle.

Step-by-step explanation: The given expression 2x^2 + 3x +3 cannot be factored.

That means that it cannot be modeled with a rectangle.

So your answer is, It cannot be modeled with a rectangle.

3 0

3 years ago

DE is tangent to Circle C at point D. What is the measure of Enter your answer in the box.

creativ13 [48]

Answer:

39°

Step-by-step explanation:

A radius of a circle (segment CD) drawn to the point of tangency (D) intersects the tangent (line DE) at a 90-deg angle.

That makes m<D = 90.

m<D + m<C + m<E = 180

90 + 51 + m<E = 180

m<E = 39

5 0

3 years ago