All categories

3 years ago

Consider this system of equations. Which equation represents the first equation written in slope-intercept form?

Mathematics

2 answers:

MaRussiya [10]3 years ago

8 0

Answer: A. 5/2 X - 5

Step-by-step explanation:

5x - 2y =10

To write the equation in a slope intercept we have to make y subject of the formular

5x - 2y = 10

we will take 2y to the right-handside and 10 to the left-handside

5x-10 = 2y

2y = 5x - 10

we divide bothside by 2

2y/2 = 5x/2 - 10/2

y = 5/2 X - 10

Maksim231197 [3]3 years ago

4 0

Answer:

A. Y = 5/2x - 5.

Step-by-step explanation:

5X - 2Y = 10

-2Y = -5X + 10

Divide both sides by -2:

Y = 5/2x - 5.

You might be interested in

-3-6x=9 please help solve for x!!!!

Vinil7 [7]

Answer: x= -2

Step-by-step explanation:

Here you go!

7 0

3 years ago

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

$x^2+8x-105=0$

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

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

The solution is x=7

therefore

Marco's age is 7 years old

4 0

4 years ago

The equation of the line whose slope is -2 and y-intercept is (0,-8)

Artemon [7]

Answer:

y=-2x-8

Step-by-step explanation:

3 0

4 years ago

The price of a pair of earrings is $22 but Priya buys them on sale for $13.20.

BARSIC [14]

Answer:

$8.80
40%

Step-by-step explanation:

The amount of the discount is the difference between the original price and the discounted price. That was ...

$22.00 -13.20 = $8.80

The percentage of the discount is the ratio of the amount of the discount to the original price. That was ...

8.80/22.00 × 100% = 40%

The price was discounted $8.80. That was a 40% discount.

6 0

3 years ago

Write expression of the following phrase. <br> x is at least 7

SIZIF [17.4K]

Answer:

x ≥ 7

Step-by-step explanation:

"Is at least" means the same as "is greater than or equal to". Then "x is greater than or equal to 7" is expressed in symbols as ...

x ≥ 7

5 0

3 years ago