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Airida [17]
3 years ago
5

If f(x)=3x^2+7x-8 then what does f(-3)=

Mathematics
1 answer:
Feliz [49]3 years ago
6 0

Answer:

f ( -3) = -2

Step-by-step explanation:

In pic

<u><em>(Credits: Symbolab)</em></u>

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(Hope this helps can I pls have brainlist (crown)☺️)

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Find the width of the rectangular prism when the surface area is 208 centimeters
BlackZzzverrR [31]

Use the surface area formula of a rectangular prism to find the width. (I have changed it to use the same terms given in the problem).


A

=

2

(

d

w

+

h

w

+

h

d

)


Because of the given information, it is known that:


A

=

208


h

=

8


d

=

6


The width is not know, so let it keep it's variable

w

. But substitute the other values into the equation:


A

=

2

(

d

w

+

h

w

+

h

d

)


208

=

2

[

6

w

+

8

w

+

(

8

)

(

6

)

]


208

=

2

(

14

w

+

48

)


Use the distributive property to solve the right side of the equal sign:


208

=

2

(

14

w

+

48

)


208

=

28

w

+

96


112

=

28

w


112

28

=

w


4

=

w


The width is

4

.

5 0
4 years ago
During a rock concert, the noise level (in decibels) in front row seats has a mean of 95 dB with a standard deviation of 8 dB. W
lorasvet [3.4K]

Answer:

\frac{8}{9} *100= 88.89 \%

So we have at least 88.89% of the noise level values within 3 deviation from the mean.

Step-by-step explanation:

For this case let define the random variable X as the noise level, we know the following properties for X:

E(X) = 95 , Sd(X)= 8

And for this case we don't know the distribution for the random variable X.

But we can use the Chebysev theorem who states that the minimum percentage of the data that lies within k standard deviations from the mean is given by:

1 -\frac{1}{k^2}, k>1

So for this case we have that k = 3 and if we use this theorem we have:

1- \frac{1}{3^2}

1- \frac{1}{9}=\frac{8}{9}

And we can convert this into % and we got:

\frac{8}{9} *100= 88.89 \%

So we have at least 88.89% of the noise level values within 3 deviation from the mean.

5 0
3 years ago
What does the graph of -3x-5y≥20 look like?
Hoochie [10]
The answer is D I believe
8 0
3 years ago
If you had 6 million dollar and you divided that by 1 billion what would you get. Then once you find that multiply your answer b
MA_775_DIABLO [31]

Answer: You get 0.06 which is 6 cents in terms of money.

Step-by-step explanation:

6 millions could be written as 6,000,000 and 1  billion could also be written as  1,000,000,000   so using this set up a fraction to divide it.

\frac{6000000}{1,000,000,000} = 0.006  

0.006 * 10 = 0.06  

5 0
4 years ago
Which numbers are rational numbers? 3.02659, 3, 3.14159, 3.7
Setler79 [48]
3 and 3.7 are rational
8 0
4 years ago
Read 2 more answers
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