MATHEMATICS HIGH SCHOOL

Using solving systems by substitution, how do you solve Y=5x-7
6x-5y=12Solve for x and y (x,y)

Answers

Answer 1
Answer: y=5x-7 \n6x-5y=12 \n \n\hbox{substitute 5x-7 for y in the 2nd equation:} \n6x-5(5x-7)=12 \n6x-25x+35=12 \n6x-25x=12-35 \n-19x=-23 \nx=(-23)/(-19) \nx=(23)/(19) \n \ny=5x-7=5 * (23)/(19)-7=(115)/(19)-(133)/(19)=-(18)/(19) \n \n(x,y)=((23)/(19),-(18)/(19))

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Can someone please help me?
write an equation with the solution x=20. The equation should have the variable on both sides, a fractional coefficient on the left side, and a fraction anywhere on the right side
Prove: BC|| ADplz hurry
3.) Consider the following set of equations:Equation C: y = 2x + 8 Equation D: y = 2x + 2 Which of the following best describes the solution to the given set of equations? No solution - Is this the answer? One solution Two solutions Infinite solutions
for 7.52 you purchased 8 pens and highlighters from a local bookstore. Each highlighter cost $1.09 and each pen cost $.69. how many pens did you buy?

1711
What is the solution to the equation 4
X-
8-+żx?
x=-5
O x-4
X-4
x-5

Answers

Answer:

21

Step-by-step explanation:

The plot has an area of 78,125 square meters and is 125 meters wide. What is the length of the plot?

Answers

625 meters long is the correct answer
Area formula: A = l * w or Area = length * width
Area: 78,125
Width: 125
Length: ?
78,125 = 125l
78,125/125 = 125l/125
625 = l

What is the sum of the first 22 terms of the following series?86 + 79+ 72 + 65 + 58 +...

Answers

S22 = (86*2+(79-86)*(22-1))*22/2 = 275

42 = -7 (z - 3)

z = ?

Answers

Answer:

The answer to your question is z = -3

Step-by-step explanation:

Expand                 42 = -7(z - 3)

                             42 = -7z + 21

Simplify                 7z = -42 + 21

                             7z = -21

Clear z                    z = (-21)/(7)

                              z = -3                                                            

42=-7z+21
42-21=-7z
21/-7=-7z/-7
-3=z

What is the slope of the line that contains the points (-2, 8) and (-2, 1)?9

4

undefined

- 7

4

0

Answers

slope of the line = m

(y-y')= m (x-x')
(8-1)= m {-2 -(-2)}
7 = m (-2+2)
7 = m x 0
m= (7÷0)

so m is undefined.

so; the slope of the line is undefined... :)

Eduardo rented a bike from James' Bikes. It cost $19 plus $6 per hour. If Eduardo paid $49 then he rented the bike for how many hours?

Answers

So to solve this, you would have to write the equation, which is 49=6x+19

Then solve your equation.

49=6x+19
-19        -19
30=6x
/6     /6

5=x

So he rented it for 5 hours.

Final answer:

As per the given values, Eduardo rented the bike for 5 hours.

Explanation:

Fixed cost = $19

Total amount paid = $49

Cost of each hour = $6,

Finding the number of hours Eduardo rented the bike for -

= Total amount paid - fixed cost

= 49 - 19

= 30

This remaining amount represents the cost of the hours rented.

Calculating the number of hours -

= Total number of hours /  Cost of each hour

= 30/6

= 5

So, Eduardo rented the bike for 5 hours.

Learn more about Renting a bike here:

brainly.com/question/29260073

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