MATHEMATICS MIDDLE SCHOOL

How do I solve the proportion
x+1/3 = x+5/x

Answers

Answer 1
Answer: (x+1)/(3) = (x+5)/(x) \n \n 3(x+5)=x(x+1) \n \n 3x+15=x^2+x \n \n 3x+15-x^2-x=0 \n \n -x^2+2x+15=0 \n \n \boxed{\boxed{ \Delta=b^2-4ac}} \n \n \Delta=2^2-4\cdot(-1)\cdot15 \n \Delta=4+60\n \Delta=64 \n \n \boxed{\boxed{\text{X}_(1,2)= (-b\pm √(\Delta) )/(2a) }} \n \n \n \boxed{\text{X}_(1)= (-b - √(\Delta) )/(2a) = (-2-8)/(-2) = (10)/(2) = 5} \n \boxed{\text{X}_2= (-b+ √(\Delta) )/(2a) = (-2+8)/(-2) = (6)/(2)=3 }

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4-3x=8x+7

PLEASE HELP I GIVE THANKS!

Answers

Since 8x contains the variable to solve for, move it to the left-hand side of the equation by subtracting 8x from both sides.
4−3x−8x=7

Add −3x and −8x to get −11x.
4−11x=7

Move 4 to the right hand side of the equation by subtracting 4 from both sides.
−11x=−4+7

Add −4 and 7 to get 3.
−11x=3

Divide each term in the equation by −11.


x=−3/11
Subtract four from either side:
-3x = 8x +3
Subtract 8x from either side
-11x = 3
Divide both side by negative eleven
x = -11/3
That's your answer! Hope this helps!

What is the reciprocal of 15?

Answers

Reciprocal is just so to say flipping the number so think of this as 15/1 and just flip it, your answer is 1/15

Two angles are supplementary. One angle measures 90 degrees. What is the measurement of the other angle? A.90 B.10 C.100 D.0PLEASEEEE HURRY

Answers

Answer:

it will have to be 90 degrees, because two angles that are supplementary add up to be 180 degrees so 90 + 90 is 180. hope this helps

Step-by-step explanation:

What are the amplitude, period, and midline of a function?

Answers

Answer:

Some functions repeat forever (sine and cosine) and those functions are known as periodic functions.

The period goes from from any point to the next matching point or one peak to the next peak.

The mid line or center line is a horizontal axis about which the graph of a periodic function oscillates.

The amplitude is the height from the mid line to the peak .

a DVD that originally cost $30 was marked up for 10 percent. What is the cost for the DVD after mark up ?

Answers

Answer:

33

Step-by-step explanation:

Answer:

The answer is

33$

Step-by-step explanation:

A giant bamboo plant grew an average of 18 centimeters per year.The botanist started measuring the plant when it was 5 centimeters tall. If "Y" represents the number of years the botanist has measured the plant,what expression represents its height?Solve,and show each step.

Answers

h=height
y=number of years.

we have the next expresion:
h(y)=my+b  

m=the slope of the line, in this case, the slope is equal to "18"; (18 cm/ year).
b=the initial heigth, in this case, the initial heigth is equal to "5" (5 cm).

Therefore, our  expression will be:
h(y)=18y +5

answer: h(y)=18y+5
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