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Mekhanik [1.2K]
2 years ago
8

5/6=−4/x+2 A. x=−2 4/5 B. x=−4 2/5 C. x=−5 1/5 D. x=−6 4/5

Mathematics
1 answer:
sukhopar [10]2 years ago
5 0

Answer:

D is your answer i think it is

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Marco is 8 years younger than his brother Paolo. If their product of their ages is 105, how old is Marco? plz help
Nina [5.8K]

Answer:

Marco's age is 7 years old

Step-by-step explanation:

Let

x ----> Marco's age

y ----> Paolo's age

we know that

x=y-8 ----> y=x+8 ----> equation A

xy=105 ----> equation B

substitute equation A in equation B

x(x+8)=105

x^2+8x-105=0

Solve the quadratic equation

The formula to solve a quadratic equation of the form

ax^{2} +bx+c=0

is equal to

x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}

in this problem we have

x^2+8x-105=0

so

a=1\\b=8\\c=-105

substitute in the formula

x=\frac{-8(+/-)\sqrt{8^{2}-4(1)(-105)}} {2(1)}

x=\frac{-8(+/-)\sqrt{484}} {2}

x=\frac{-8(+/-)22} {2}

x=\frac{-8(+)22} {2}=7

x=\frac{-8(-)22} {2}=-15

Remember that the solution cannot be a negative number

so

The solution is x=7

therefore

Marco's age is 7 years old

4 0
3 years ago
Which of the following are ordered pairs for the equation y = 1/8x + 11
Anna11 [10]

Answer:

(0, 11) is a solution.

(8, 12)  is a solution.

(16, 13) is a solution

(1, 89/8)  

(2,  45/4)

Step-by-step explanation:

y = 1/8x + 11

for this equation....

y = (1/8) x + 11

let x = 0  get

y = 0 + 11 = 11

(0, 11) is a solution.

(8, 12)  is a solution.

(16, 13) is a solution

(1, 89/8)   because    y = 1/8 + 11 = 1/8 + 88/8 = 89/8

(2,  45/4)

3 0
2 years ago
Give the digits in the tenths place and the hundredths place <br> 73.91
azamat
Tenths is 73.9 hundredths is 73.91
3 0
3 years ago
Solve For H ---I&gt; A=1/2(B₁+B₂)h
Alex

Answer:

  • h = 2A/(B₁+B₂)

Step-by-step explanation:

<u>Given equation</u>

  • A=1/2(B₁+B₂)h

<u>Solving for h</u>

  • A=1/2(B₁+B₂)h
  • 2A = (B₁+B₂)h
  • 2A/(B₁+B₂)= h
  • h = 2A/(B₁+B₂)

3 0
3 years ago
draw a short roller coaster on graph paper, plot ordered pairs on its path, and determine the slope, or rate of change, along th
UNO [17]

Answer: Soliciting help from outside sources is a violation of your school's Honor Code and academic integrity agreement.

Step-by-step explanation:

Do your best and work with your teacher to ensure that you understand the requirements of this project and are prepared to submit great work!

5 0
3 years ago
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