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blsea [12.9K]
2 years ago
15

F(x)=-4x^2+9 Find f(−3)

Mathematics
1 answer:
pochemuha2 years ago
8 0

Answer:

f (-3) = 45

Step-by-step explanation:

f (x) =

4x {}^{2}  + 9

f (-3) =

(4 \times  - 3 \times  - 3) + 9

=》

36 + 9

=》

45

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N/B
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4.9×108 in standard form?
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Answer:

6.372

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HELP ME OUT PLEASE!
atroni [7]

Answer:

6.85 × 10⁷

Step-by-step explanation:

The purpose of scientific notation is for scientists to write very large, or very small, numbers with ease.

Calculating scientific notation for a positive integer is simple, as it always follows this notation:

a x 10b

Follow the steps below to see how 68,500,000 is written in scientific notation.

Step 1

To find a, take the number and move a decimal place to the right one position.

Original Number: 68,500,000

New Number: 6.8500000

Step 2

Now, to find b, count how many places to the right of the decimal.

New Number:6.8500000Decimal Count:1234567

There are 7 places to the right of the decimal place.

Step 3

Building upon what we know above, we can now reconstruct the number into scientific notation.

Remember, the notation is: a x 10b

a = 6.85 (Please notice any zeroes on the end have been removed)

b = 7

Now the whole thing:

6.85 x 107

Step 4

Check your work:

107 = 10,000,000 x 6.85 = 68,500,000

6 0
2 years ago
Y-4x=3. 2x-3y=21 can someone help
mars1129 [50]

Y-4X =3 ; 2x-3y=21

Y= 3+ 4x

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-10x = 30

X= 30/-10= -3

Y= 3+4x = 3+ 4* (-3)= 3-12= -9

3 0
3 years ago
Please help me with this question.
Katen [24]

Answer:

ok what is it

Step-by-step explanation:

3 0
3 years ago
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