Answer:
See below.
Step-by-step explanation:
f(3) means the y-coordinate of the point that has x-coordinate 3.
To find f(3) using a graph of f(x).
Look up x = 3 on the x axis. If the function passes through that point on the x-axis, then f(3) is 0. If the function does not pass through that point, then go up or down till you intersect the function. Draw a horizontal segment left to the y-axis and read the point on the y-axis that the horizontal segment intersects. That is what f(3) is equal to.
Answer:
Step-by-step explanation:
It is hard for me to read but you take the weight times the cost per pound to find out how much
IF you buy potatoes 6.3 pounds times $7.56 a pound = $47.63 total
but IF its 6.3 pound at a total cost of $7.56 you divide to find the per pound price. $7.56 ÷ 6.3 pounds = $1.20 a pound.
to check this you take your answer $1.20 times the number of pounds bought 6.3 = $7.56
1x + 2y = 4 ⇒ 3x + 6y = 12
3x + 2y = 0 ⇒ <u>3x + 2y = 0</u>
<u>4y</u> = <u>12</u>
4 4
y = 3
x + 2y = 4
x + 2(3) = 4
x + 6 = 4
<u> - 6 - 6</u>
x = -2
(x, y) = (-2, 2)
p = q + 2
3p + 2q = 9
3(q + 2) + 2q = -9
3(q) + 3(2) + 2q = -9
3q + 6 + 2q = -9
3q + 2q + 6 = -9
5q + 6 = -9
<u> - 6 - 6</u>
<u>5q</u> = <u>-15</u>
5 5
q = -3
p = q + 2
p = -3 + 2
p = -1
(p, q) = (-3, -1)
