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2 years ago

Solution of the equation 3x/5+1 = 4x/15+7

Mathematics

1 answer:

Inessa05 [86]2 years ago

6 0

Answer:

$x=18$

Step-by-step explanation:

$\frac{3x}{5} +1=\frac{4x}{15} +7$

$\frac{3x}{5} -\frac{4x}{15} =7-1$

$\frac{9x}{15} -\frac{4x}{15} =6$

$5x/15=6$

$5x=90$

$x=18$

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Round this number to the nearest tenth.<br><br> 52.85

k0ka [10]

Answer:

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2 years ago

Given r(x) = x square +2x -1 and s(x) = x-1 what is the value of r(s(3))

Amanda [17]

Answer:

$r(s(3))=7$

Step-by-step explanation:

we have

$r(x)=x^{2} +2x-1$

$s(x)=x-1$

we know that

The function composition is equal to

(r ∘ s )(x) = r(s(x))

In the function r(x) substitute the variable x by the function s(x)

$r(s(x))=(x-1)^{2} +2(x-1)-1$

For x=3

substitute the value of x=3 in the function composition

$r(s(3))=(3-1)^{2} +2(3-1)-1$

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$r(s(3))=4+4-1$

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3 0

3 years ago

Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.

Maurinko [17]

Answer:

616 square centimeters

Step-by-step explanation:

Area of a circle is equal to pi × r^2. In this case, they have asked that you substitute 3.14 or 22/7 for pi, so I will be using 22/7, instead.

Diameter is equal to 2r; to find the radius, simply divide 28 by two. This gives us a radius of 14.

Multiply 14 squared by 22/7:

(22/7)(14^2)

This gives us (22/7)(196); (4312/7); 616.

Therefore, the area of the circle is approximately 616 square centimeters.

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2 years ago

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stepladder [879]

Answer:

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Step-by-step explanation:

I hope this helps. :)

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2 years ago

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aleksklad [387]

Answer:

Step-by-step explanation:

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3 0

2 years ago

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