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Zanzabum
4 years ago
15

A music app charged $2 to download the app plus $1.29 per song downloaded. Write and solve a linear equation to find the total c

ost to download 30 songs.
Mathematics
1 answer:
lara31 [8.8K]4 years ago
3 0

So from what I am seeing is $2 + $1.29 times 30. Which would be $43.7

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Evaluate the expression when a= 4 and b= -7. <br> -9a+b
Helen [10]

Answer:

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Step-by-step explanation:

So first things first you will multiply -9 by 4 and that gives you -36, Next you will add -7 to -36 which gives you -43.

-9(4)+(-7)\\-36+(-7)  \\= -43

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3 years ago
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In the triangle below, what is the length of Ac?<br> B<br> 60°<br> 14<br> 60°<br> 60°<br> А<br> с
Katena32 [7]

Answer:

A-14

Step-by-step explanation:

All the angles of the triangle ABC are 60°.

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3 years ago
Which equation is the inverse of 5 y + 4 = (x + 3) squared + one-half?
telo118 [61]

Answer:

The correct option is the last option d.) y = negative 3 plus-or-minus StartRoot 5 x + seven-halves EndRoot

Step-by-step explanation:

the given equation is 5y + 4 =(x+3)^{2}  + \frac{1}{2}

Therefore we can write 5y\hspace{0.1cm} = (x+3)^{2} + \frac{1}{2} - 4  \hspace{0.3cm}   \Rightarrow  \hspace{0.2cm}  5y = (x+3)^{2} - \frac{7}{2}   \hspace{0.3cm} \Rightarrow \hspace{0.3cm}  y = \frac{(x+3)^{2}}{5} - \frac{7}{10}

To find the inverse of the above function let us replace x with y and y with x.

Therefore we get

x = \frac{(y+3)^{2}}{5} - \frac{7}{10}

Now we write the above equation with only y on the Left hand side and we will obtain the inverse of the given function

y = \pm \sqrt{5 (x + \frac{7}{10} )} \hspace{0.1cm} - \hspace{0.1cm} 3 \hspace{0.1cm} \Rightarrow\hspace{0.1cm}  y =  \pm \sqrt{5x + \frac{7}{2} }  - \hspace{0.1cm} 3 \hspace{0.1cm}

Therefore the correct option is the last option d.) y = negative 3 plus-or-minus StartRoot 5 x + seven-halves EndRoot , y =  \pm \sqrt{5x + \frac{7}{2} }  - \hspace{0.1cm} 3 \hspace{0.1cm}

8 0
3 years ago
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Olenka [21]

Answer:

I don't see an equation or anything???

Step-by-step explanation:

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AysviL [449]

Answer:

D.

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