Make a t diagram between two cars
Let's start with y = 4x + b (since 4 is the slope);
We need to find what number should be put instead of b;
Then, let's see what needs to be done;
Plug in the y and x values from the coordinate (22,12) into y=4x+b;
12 = 4(22) + b
Solve;
12 = 88 + b
12 - 88 = b
b = -76
Remember the equation y = 4x + b? Put the -76 instead of b:
y = 4x + -76
or: y = 4x - 76
That is the equation.
To make it standard form, put x and y both in the left side, with x first then y:
-4x + y = -76
^^Answer!
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Answer:

Step-by-step explanation:
To find the cosine of <R, apply the following trigonometric ratio formula:

Adjacent = 3
Hypotenuse = √15
Plug in the values into the formula

Multiply the numerator and denominator by √15 to rationalize.




Answer:
Step-by-step explanation: