3 years ago

I NEED HELP PLSS ASAP

Mathematics

1 answer:

Katena32 [7]3 years ago

6 0

Answer:

I don't know why this always happens to me it looks black can u ask the question and I will answer

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Suppose f(x) = 3x2 – 2x: Find f(-4). А B -40 ОО C 56<br>plz helpp

amid [387]

Answer:

f(-4) = 56

Step-by-step explanation:

f(x) = 3x² - 2x

To find f(-4), substitute -4 for all the values of x in f(x).

f(-4) = 3(-4)² - 2(-4)

Square -4.

f(-4) = 3(16) - 2(-4)

Multiply 3 and 16.

f(-4) = 48 - 2(-4)

Multiply -2 and -4.

48 + 8

Add.

You had the right idea! :)

7 0

3 years ago

In testing the lethal concentration of a chemical found in polluted water. it is found that a certain concentration will kill 20

sasho [114]

Answer:

a) 0.1091

b) 0.9994

c) 0.5886

Step-by-step explanation:

X = the number of fish out of 20 that die after 24 hours

x = 0, 1, 2, . . . , 20

X~ Binomial (n= 20, p =0.20)

P(14 survive) = P(X = 6)

= $nC_r p^r q^{n-r}= 20C_6 0.2^6\times0.8^{14}$ =0.1091

Similarly we can find out

P(at least 10 survive) = P( X <= 10 ) = (Using technology) = 0.9994

P(at most 16 will survive) = P(X <= 16) = (Using technology) = 0.5886

7 0

3 years ago

If 5 of 22 students are hearing impaired - what fraction of students are hearing impaired

Shtirlitz [24]

5/22 the number you get from the total becomes the numerator and the total amount becomes the denominator

7 0

3 years ago

NEED HELP ASAP<br><br><br> Find f(-2) for f(x) = 2(4)^x

viktelen [127]

Answer:

A.) $\frac{1}{8}$

Step-by-step explanation:

f(-2) means plug in -2 in for x for the equation f(x), therefore,

f(-2) = $2(4)^x = 2(4)^{-2} = \frac{1}{8}$

4 0

3 years ago

Someone please help?

Nastasia [14]

Step-by-step explanation:

1=2 given

also 1=3. [ vertical opposite angles are equal]

From above equations:

2=3

corresponding angles are equal which means both lines are parallel.

Hope thus will help:)

3 0

3 years ago