Answer:
36 laps Ronnie swim during practice .
Step-by-step explanation:
Let us assume that the laps that Ronnie swims be x .
Let us assume that the laps that Jackie swims be y .
As given
For every 3 laps that Jackie swims, Ronnie swims 4 laps.
i.e
3 × laps that Ronnie swims = 4 × laps that Jackie swims
3 × x = 4 × y
3x = 4y
Equation becomes
x + y = 63
Thus by using 3x = 4y .
Thus
4x + 3x = 63 × 4
7x = 252
x = 36
Put the value of x in the equation x + y = 63
36 + y = 63
y = 63 - 36
y = 27
Therefore the 36 laps Ronnie swim during practice .
Answer:
I answered some of them
Step-by-step explanation:
Answer:
Given the equation 8 + 3y = 2·(x+5)
slope=2/3
y- intercept= (0, 2/3) or y= 2/3.
x-intercept= (-1, 0) or x = -1.
Step-by-step explanation:
Given 8 + 3y = 2·(x+5) ⇒ 8 + 3y = 2x + 10 ⇒ 3y = 2x + 10 -8 ⇒ 3y = 2x + 2
⇒ y = (2/3)x + 2/3.
Here slope = 2/3 and y-intercept = 2/3.
To find x-intercept, we have to calculate the value of "x" when y =0.
⇒ 0 = (2/3)x + 2/3 ⇒ 0 - 2/3 = (2/3)x ⇒ -2/3 = (2/3)x ⇒ (-2/3)/(2/3)= x
⇒ x =-1.
Answer:
120
Explanation:
multiply 20 and 6