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Radda [10]
3 years ago
14

Math experts. Can somebody help please.

Mathematics
1 answer:
eimsori [14]3 years ago
3 0
The surface area is 20.38 and the volume is 4.84

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Please help me out!​
seropon [69]

Answer:

Second option

Third option

Fourth option

Step-by-step explanation:

We have the following quadratic function

f(x) =(x-1)(x+7)

Use the distributive property to multiply the expression

f(x) =x^2+7x-x-7

f(x) =x^2+6x-7

For a function of the form f (x) = ax ^ 2 + bx + c the x coordinate of the vertex is:

x =-\frac{b}{2a}

Then in this case the coordinate of the vertex is:

x =-\frac{6}{2(1)}

x =-3

To obtain the y coordinate of the vertex we evaluate the function at x = -3

f(-3) =(-3)^2+6(-3)-7

f(-3) =9-18-7

f(-3) =-16

Then the vertex is:  (-3, -16)

We can see in the graph that the zeros of the function are x=1 and x=-7

Then the function is decreasing from -∞ to -3 and then it is increasing from -3 to ∞

The function is positive for x and x> 1

The correct answers are:

Second option

Third option

Fourth option

7 0
3 years ago
58.15<br> If f(x) = 5x + 40, what is f(x) when x = -5?
Ket [755]

Answer:

15

Step-by-step explanation:

if you put x=-15

f(x) = 5*-5 +40

=-25+40

=15

7 0
3 years ago
Draw a net for the pyramid. Label all sides with measurements. 4cm 3cm 2.24cm
PIT_PIT [208]
Here hopes its help u

8 0
3 years ago
1) ? x (-9) = -36
diamong [38]

Answer:

1. 4

2. 4

3.7

4.-2

5.-8

6. -5

7.5

8.24

3 0
3 years ago
Read 2 more answers
The life in hours of a battery is known to be approximately normally distributed, with standard deviation σ = 1.25 hours. A rand
Papessa [141]

Answer

The answer and procedures of the exercise are attached in the following archives.

Step-by-step explanation:

You will find the procedures, formulas or necessary explanations in the archive attached below. If you have any question ask and I will aclare your doubts kindly.  

6 0
3 years ago
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