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PIT_PIT [208]
3 years ago
11

What is the correct value of f(-1) if f(x) = 2x2 – 3x – 9

Mathematics
2 answers:
schepotkina [342]3 years ago
8 0

I hope this helps! Let me know if I got anything wrong or if you need me to explain it.

Zina [86]3 years ago
4 0

Answer:

-is a 4x ala 2 -3x -9

-or 4x2 -3x1-9x

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A sapling, or young tree, is planted in a garden. After 3 years, it is 180 cm tall. After 7 years, it is 368 cm tall. What is th
Mashcka [7]
The function modelled by the height (x) of the tree is as follows:
y - 180 = (368 - 180)/(7 - 3) (x - 3)
y - 180 = 47(x - 3) = 47x - 141
y = 47x - 141 + 180 = 47x + 39

Therefore, after 10 years, the tree will be 47(10) + 39 = 470 + 39 = 509 cm tall
8 0
3 years ago
Please help: A box contains 5 yellow balls, 3 blue, and 1 red ball. Two balls are drawn at random. Find the probability that:
Y_Kistochka [10]

Answer:

a) 0.2778

b) 0.3611

c) 0.1389

d) 0.0833

Step-by-step explanation:

We have a total of 5 + 3 + 1 = 9 balls

a) First ball being yellow: we have 5 yellow balls, so P1 = 5/9

Second ball being yellow after one yellow was drawn: we have 4 yellows and 8 balls, so P2 = 4/8 = 1/2

Both yellows: P = P1 * P2 = 5/18 = 0.2778

b) Both blues:

P1 = 3/9 = 1/3

P2 = 2/8 = 1/4

P = P1 * P2 = 1/12 = 0.0833

Both yellows or both blues: 5/18 + 1/12 = 0.2778 + 0.0833 = 0.3611

c) First yellow: P1 = 5/9

Second red: P2 = 1/8

Pa = P1 * P2 = 5/72

or

First red: P3 = 1/9

Second yellow: P4 = 5/8

Pb = P3 * P4 = 5/72

P = Pa + Pb = 10/72 = 5/36 = 0.1389

d) First blue: P1 = 3/9 = 1/3

Second red: P2 = 1/8

Pa = P1 * P2 = 1/24

or

First red: P3 = 1/9

Second blue: P4 = 3/8

Pb = P3 * P4 = 1/24

P = Pa + Pb = 2/24 = 1/12 = 0.0833

8 0
3 years ago
In which quadrant does the point with c ordinate (4, -3) lie?
KiRa [710]

Answer:

4

Step-by-step explanation:

hope the diagram helps haha

3 0
2 years ago
Given the circle below with secants BCD and FED, find the length of BC.
Stells [14]
It is 7.3 please give brainliest
8 0
2 years ago
What temperature is 9 degrees higher than -3 degrees?
aleksklad [387]

Answer:

6 degrees

Step-by-step explanation:

-3 + 9 is 6. To check this answer you can subtract 9 from 6

3 0
3 years ago
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