Each day she eats 1/2 cups of rice. But we want to know how long it will take to each 2 cups worth. so lets make an equation.
.5x = 2
Divide both sides by .5
x = 4
So it will take 4 days to eat 2 cups of rice cereal.
Y + 6 = 4/5( x + 3)
y + 6 = 4/5x + (3(4))/5
y + 6 = 4/5x + (12)/5
y + 6 = 4/5x + 12/5
y + 6 (-6) = 4/5x + 12/5 (-6)
y = 4/5x + 12/5 (- 30/5)
y = 4/5x - 3.6 ( y = mx + b formula)
4/5 = 0.8
y = 0.8x - 3.6
x = 1
y = 0.8(1) - 3.6
y = - 2.8
x = 2
y = 0.8(2) - 3.6
y = 1.6 - 3.6
y = -2
x = 3
y = 0.8(3) - 3.6
y = 2.4 - 3.6
y = - 1.2
x = 4
y = 0.8(4) - 3.6
y = 3.2 - 3.6
y = - 0.4
x = 5
y = 0.8(5) - 3.6
y = 4 - 3.6
y = 0.4
etc.
graph using the (x,y)
connect the dots
hope this helps
Answer:
Step-by-step explanation:
For Question 3, we are simply taking an input for the function, as a value of x and solving the equation. For part a, we substitute 3/14 into the first function, and solve it:
f(x) = 7(3/14) + 2
f(x) = 21/14 + 2
f(x) = 49/14
f(x) = 7/2
For part b, we take the input of -3 into the second function and solve the equation:
h(x) = 4(-3)^2
h(x) = 4(9)
h(x) = 36
For Question 4, we are simply solving this equation by isolating the x variable. First, we simplify the equation to 4-5x+15+2x = -2 and simplify this again to -3x+19 = -2. Now, we can subtract 19 from both sides of the equation to get -3x = -21. Lastly, we isolate the x variable by dividing both sides of this equation by -3, to get x = 7.
believe the answer is 8 because sulfur has 6 valence electrons and when it becomes sulfide it gains two electrons making it 6+2=8.
