in the xy-plane, the graph of the function f is a line. if f(2)=7 and f(12)=1, what is the value of f(7)?

Answers

Answer 1

Answer: Given that the function is a line

[f(7) - f(2)] / [7 - 2] = [f(12) - f(2)] / [12 - 2]

[f(7) - 7] / 5 = [1 - 7] / 10

[f(7) - 7] = 5 * [-6] / 10

[f(7) - 7] = - 3

f(7) = - 3 + 7 = 4

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True or false the image of the point (-8,-5) under a reflection across the y-axis is (8,-5)

Answers

False. A reflection over the y-axis would result in: (-8,5)

a piggy bank contained $14.55 in quarters dimes and nickels if there were three more than twice as many dimes as nickels and three less than three times as many quarters as nickels how many of each kind of coin was in the piggy bank

Answers

Let x=number of nickels in the piggy bank
(2x+3)=number of dimes in the piggy bank
(3x-3)=number of quarters in the piggy bank

.05x+.10(2x+3)+.25(3x-3)=14.55
.05x+.20x+.30+.75x-.75=14.55

1.00x=14.55+.45
x=15
2x+3=33
3x-3=42

The number of nickles in the piggy bank would be 15.

The number of dimes in the piggy bank would be 33

The number of quarters in the piggy bank would be 42.

Hope I was able to help and that this was useful to you!!! :)

number of nickels in the piggy bank=15
number of dimes in the piggy bank=33
number of quarters in the piggy bank=42

Percent means per____"

Answers

means per hundred hope its right

It means per CENT, per every cent that makes up to 100, or you could say per hundred, which is why everything is based off from 0 - 100 perCENT.
I hope I helped! =D

Write in function form
X+y=6..?

Answers

$x+y=6\ \ \ \ /-x\n\ny=-x+6\n\nfor\ x=0\to y=-0+6=6\to(0;\ 6)\n\nfor\ x=6\to y=-6+6=0\to(6;\ 0)$

function form being slope-intercept?

y=-x+6

A ball, thrown vertically upwards, from the ground, has its height h (in meters) expressed as a function of time t (in seconds), elapsed after the launch, by the law h(t) = 20t - 5t2. According to this information, determine the height at which the ball is 3 seconds after the throw and the maximum height reached by the ball.