Raina, Justin, and cho have $79 in their wallets. Raina has $5 leas than Justin. Cho has 2 times what Justin has. How much does each have

Justin: 21 dollars, Raina: 16 dollars, Cho: 42 dollars.

Step-by-step explanation:

Let's say that Justin has x dollars.

Since Raina has 5 dollars less than Justin, Raina has (x - 5) dollars.

Since Cho has 2 times of what Justin has, Cho has 2x dollars.

In total, they have 79 dollars. So by adding up our quantities, they will equal 79 dollars.

x + (x - 5) + 2x = 79

So: 4x - 5 = 79

So 4x = 84

So x = 21

Therefore Justin has 21 dollars

Since Raina has 5 dollars less than Justin, Raina has 16 dollars

Since Cho has 2 times of Justin, Cho has 42 dollars

5x + 3y = - 4

step-by-step explanation:

the equation of a line in standard form is

ax + by = c ( a is a positive integer and b, c are integers )

express the line first of all in slope- intercept form

y = mx + c ( m is the slope and c the y-intercept )

to calculate m use the gradient formula

m = ( y₂ - y₁ ) / ( x₂ - x₁ )

with (x₁, y₁ ) = (7, - 3) and (x₂, y₂ ) = (4, - 8)

m = = -

y = - x + c ← is the partial equation

to find c substitute either of the 2 points into the partial equation

using (4, - 8 ), then

- 8 = - + c ⇒ c = -

y = - x - ← in slope-intercept form

multiply all terms by 3 to eliminate the fractions

3y = - 5x - 4 ( add 5x to both sides )

5x + 3y = - 4 ← in standard form

168

step-by-step explanation:

first off, we know that he drove 3.5 hours at a rate of 48 mph.

knowing that, we want to see how many miles he drove all-together.

in this case, we can just multiply 48 by 3.5.

48 * 3.5 = 168