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Mrac [35]
3 years ago
8

The table shows the outputs y for different inputs x:

Mathematics
2 answers:
andre [41]3 years ago
8 0

Part A: Yes, because no input yields more than output values.

Part B: If f(x)= 5x-21, switch the x's to 11.

f(11)=5(11)- 21. 5 times 11 equals 55, then minus by 21. 55- 21= 34.

In the table, y=8 and x=11, but in the function, y=34 and x=11.

Part C:  I have to make sure to plug in 99 for f(x).

f(x)= 5x -21, which basically is 99= 5x -21.

Add 21 to both sides. 99+21 = 5x -21+21.

99 plus 21 =120, which 120= 5x.

Divide 120 by 5 and divide 5x by 5.

The answer will be 24

Rasek [7]3 years ago
5 0
Part A: Yes, the data represent a function. The definition of a function is a relation in which no value of x will have two different values of y.
(Every time you plug in 3 as x, you will always get 4 as y; it's ok if you plug in 3 and 5 as x and get the same y, you just can't get two different y's for one x; sorry, it is pretty confusing). None of the numbers in the table repeat, so we can safely say that the relation is a function.

Part B: All we have to do is plug in 11 for x in the function given to find the answer:
f(x)=5x-21\\f(x)=5(11)-21\\f(x)=55-21\\f(x)=34
In the table, y = 8 when x = 11, but in the function given, y = 34 when x = 11, so the function given is greater.

Part C: To find the answer to C, just plug in 99 for f(x), as it tells you to do:
f(x) = 5x-21\\99=5x-21\\99+21=5x-21+21\\120=5x\\120/5=5x/5\\24=x
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I also need help on this one smh
AysviL [449]

Answer:

C. 176.6 Square feet (I think)

Step-by-step explanation:

I tried many different ways and got three of the answers above but I think this is the right one.

The equation to find area of a circular cone base: A= \pi r^2

  1. We are given the diameter (15 Feet) but we need to find the radius. So we use the diameter to radius formula: r = \frac{d}{2}
  2. Plug in numbers: r=\frac{15}{2} ≈ 7.5
  3. Use the Area formula now that you have radius: A=\pi 7.5^2
  4. Solve and get = a = 176.71458676
  5. Looking at the options the closest one to our answer (off by one-tenth) is C.

Sorry if you get this wrong. I tried lol.

7 0
2 years ago
I need help with a problem with solving by square roots in quadratic equation.
Readme [11.4K]

To solve for x, first, we add 3 to the given equation:

\begin{gathered} 2(x+5)^2-3+3=44+3, \\ 2(x+5)^2=47. \end{gathered}

Dividing by 2, we get:

(x+5)^2=\frac{47}{2}.

Therefore:

x+5=\pm\sqrt{\frac{47}{2}}.

Finally, subtracting 5 we get:

x=\pm\sqrt{\frac{47}{2}}-5.

Answer:

x=\operatorname{\pm}\sqrt{\frac{47}{2}}-5.

4 0
1 year ago
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8 0
2 years ago
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What is 340 pages; 20 percent decrease
mote1985 [20]
First you turn the % in to decimal .20
then you multiply .20 by 340=68.00
then you subtract 340.00-68.00=272.00
the final answer is 272.00 pages
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5 0
3 years ago
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The length of a desk is 3.5 feet. How many centimeters is the length? (There are 2.54 cm in an inch)
gregori [183]

Answer:106.

Step-by-step explanation:

5 0
3 years ago
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