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Sladkaya [172]
3 years ago
8

Can you guys please help me? Tell me if I’m right

Mathematics
2 answers:
GarryVolchara [31]3 years ago
4 0
Yeah they are both right
BARSIC [14]3 years ago
3 0

Answer:they are both right but I think you need to show your work before your teacher ask you use a calculator

Step-by-step explanation:

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Half of your baseball card collection got wet and was ruined. You bought 12 cards
frutty [35]

Answer:

I dont collect baseball cards sorry! XDXDXD

Step-by-step explanation:

5 0
3 years ago
Given f(x)=3x+12, find f(f^-1(0))
mamaluj [8]

Answer:

<h2>0</h2>

Step-by-step explanation:

METHOD 1.

We know:

f\bigg(f^{-1}(x)\bigg)=x

Therefore

f\bigg(f^{-1}(0)\bigg)=0

METHOD 2.

\text{Find}\ f^{-1}(x)

f(x)=3x+12\to y=3x+12

exchange x to y and vice versa:

x=3y+12

solve for y:

3y+12=x          <em>  subtract 12 from both sides</em>

3y=x-12        <em>divide both sides by 3</em>

y=\dfrac{x-12}{3}\to f^{-1}(x)=\dfrac{x-12}{3}

f\bigg(f^{-1}(x)\bigg)\to    replace x in f(x) with the expression\dfrac{x-12}{3}

f\bigg(f^{-1}(x)\bigg)=3\cdot\dfrac{x-12}{3}+12=x-12+12=x

f\bigg(f^{-1}(0)\bigg)\to put x = 0 to f\bigg(f^{-1}(x)\bigg)=x

f\bigg(f^{-1}(0)\bigg)=0

METHOD 3.

\text{Find}\ f^{-1}(x)

f^{-1}(x)=\dfrac{x-12}{3}

Calculate the value of <em>f</em> ⁻¹(x) for x = 0:

f^{-1}(0)=\dfrac{0-12}{3}=\dfrac{-12}{3}=-4

Calculate the value of <em>f(x)</em> for x = -4:

f(4)=3(-4)+12=-12+12=0

6 0
3 years ago
Help me with this pleasee
Mandarinka [93]

Answer:

D. 48

Step-by-step explanation:

For (2,12), x is multiplied by 6 to get y.

For (4,28), x is multiplied by 7 to get y.

For (6,y), x should be multiplied by 8 to get y, which would be 48

5 0
3 years ago
Read 2 more answers
Find the area of a trapezoid if the altitude is 6 inches and the median is 8 inches. (Hint: Recall that the median of a trapezoi
Y_Kistochka [10]
It is the same as the area of a rectangle with those dimensions:
.. Area = (6 in)*(8 in) = 48 in^2
4 0
3 years ago
Read 2 more answers
7) Isidro pays $20 a month for Netflix. He also pays $0.10 for each
egoroff_w [7]

Answer:

200 shows

Step-by-step explanation:

subtract the total ($40) from how much he pays a month ($20) to get the total of how much he paid in shows total ($20)

40-20=20

divide the total bill of shows ($20) by how much it costs per show ($0.10) to get how many shows he has watched (200)

20/0.10=200

Hope this helps!!

8 0
3 years ago
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