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lbvjy [14]
2 years ago
5

Rationalize the denominator. – 5x4 ✓4x +7

Mathematics
2 answers:
pychu [463]2 years ago
6 0
<h2>Answer:        <u>  (-5x⁴)(√(4x + 7))  </u></h2><h2>                                4x + 7</h2>

<h3>Step-by-step explanation:</h3>

The question is asking us to make the denominator a rational function by finding a way to remove the square root without changing the value of the overall function.

We can do this by multiplying the denominator and numerator by the √(4x + 7), since multiplying a root term by that root term = the number being rooted  (√x × √x = x).

<u>    - 5x⁴      </u>   ×     <u>  √(4x + 7)   </u>  =  <u>  (-5x⁴)(√(4x + 7))  </u>

√(4x + 7)              √(4x + 7)                 4x + 7

I am Lyosha [343]2 years ago
3 0

Answer:

Step-by-step explanation:

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For a project in his Geometry class, Mamadou uses a mirror on the ground to measure the height of his school's football goalpost
andreev551 [17]

Answer:

Height of the goalpost is 9.25 m.

Step-by-step explanation:

As per the rule of reflection in physics,

Angle of incidence = Angle of reflection

As we can see in the picture attached, both the angles (θ) are equal.

m∠ACB = m∠ECD = 90° - θ

m∠ABC = m∠ADC = 90°

Therefore, both the triangles ΔABC and ΔEDC will be similar.

And by the property of similar triangles, their corresponding sides will be proportional.

\frac{AB}{ED}= \frac{CB}{CD}

\frac{1.75}{ED}=\frac{2.6}{13.75}

ED = \frac{1.75\times 13.75}{2.6}

ED = 9.25 m

Height of the goalpost is 9.25 m.

4 0
2 years ago
Solve for x.<br> 25x=30<br> Simplify your answer as much as possible.
irinina [24]
Answer:

x = 750

Explanation:

25x = 30

1. Multiply 25 by 30

25 * 30 = 750

2. Divide 750 by 25

750/25 = 30

3. Divide 750 by 30

750/30 = 25

Therefore, x = 750
3 0
3 years ago
Read 2 more answers
Please help!!!!!!!!!!!
yawa3891 [41]

Answer:

h = 1,268 cm

Step-by-step explanation:

                   V = (π·r²·h)/3, general formula

                 83 = (π·4²·h)/3, substitute what is given V= 83 cm³ and r = 4 cm

             83 ·3 = (π· 16·h)·3/3, multiply both sides by 3 and solve 4² = 16

               249 = π·16·h, multiply 83·3 = 249 and 3/3 = 1

      249/ π·16 = h , divide both sides by π·16

1,268.146587 = h, solve

             1,268 ≈ h , is rounded to the nearest cm

6 0
2 years ago
Find the circumference of the following circle using 3.14 for π. Label your answer and do not round.
valina [46]
D=2r so the diameter is 10.4ft. Multiple 10.4ft by 3.14 to get the answer. The answer is 32.656
8 0
3 years ago
Read 2 more answers
For the love of God, please answer this.<br> thanks, W.
Andrew [12]

The equation of the perpendicular line will be y = (4/3)x.

<h3>What is a linear equation?</h3>

A relationship between two or more parameters that, when shown on a graph, produces a linear model. The degree of the variable will be one.

The linear equation is given as,

y = mx + c

Where m is the slope of the line and c is the y-intercept of the line.

Then the equation of the perpendicular line will be given as

y = - (1 / m)x + c

The equation of line is y = -3/4 x + 1.

Then the equation of the perpendicular line will be

y = 4/3 x + c

The equation is passing through (9, 12), then we have

12 = 4/3 (9) + c

12 = 12 + c

c = 0

Then the equation of the perpendicular line will be y = (4/3)x.

More about the linear equation link is given below.

brainly.com/question/11897796

#SPJ1

8 0
1 year ago
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