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Juli2301 [7.4K]
2 years ago
8

What is the rational number equivalent to 3 point 12 with a bar over 12?

Mathematics
2 answers:
Studentka2010 [4]2 years ago
5 0
The answer is a, hope I helped :)
KiRa [710]2 years ago
4 0
The correct answer should be A.

Good luck:)
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Consider the intersecting lines shown. Which of the following statements could you prove based on this?
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Answer:

Step-by-step explanation:

Answer D I just fot it right on my test

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Problem #4, solve for X
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A ball thrown in the air has a height of y = - 16x² + 50x + 3 feet after x seconds. a) What are the units of measurement for the
Lubov Fominskaja [6]
<h2>Answer:</h2>

(a) ft/s

(b) 1ft/s

<h2>Step-by-step explanation:</h2>

Given equation;

y = (- 16x² + 50x + 3)ft       -------------(i)

Where;

y is measured in feet(ft)

x is measured in seconds(s).

(a) The rate of change of y with respect to x is found by dividing the total change in y by the total change in x. i.e

Δy / Δx

Where;

Δy = y₂ - y₁  

Δx = x₂ - x₁

∴ Δy / Δx = \frac{y_2 - y_1}{x_2 - x_1}              --------------(ii)

Since y is measured in feet, Δy will also be measured in feet.

Also, since x is measured in seconds, Δx will also be measured in seconds.

Therefore, the rate of change of y with respect to x (Δy / Δx) will be measured in feet per second (ft/s)

(b) The rate of change of y between x  = 0 and x = 2 can be found by using equation (ii)

Where;

y₂ is the value of y at x = 2 found by substituting x = 2 into equation (i)

y₁ is the value of y at x = 0 found by substituting x = 0 into equation (i)

=> y₂ =  - 16(2)² + 50(2) + 3 = 39

=> y₁ =  - 16(1)² + 50(1) + 3 = 37

Now, substitute the values of y₂, y₁, x₂ and x₁  into equation (ii)

Δy / Δx = \frac{39 - 37}{2 - 0}  

Δy / Δx = \frac{2}{2}

Δy / Δx = 1

Therefore, the rate of change of y is 1 ft/s

 

3 0
2 years ago
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djyliett [7]
Solve a simpler problem
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use a graph
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Translate the verbal expression into an algebraic expression "Four times the sum of a number and 5"?
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Answer:

4(x+5)

Step-by-step explanation:

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