I have been having trouble with this one for a while please help

Mathematics

1 answer:

Gelneren [198K]2 years ago

8 0

The answer is A.

A is correct because...

(7z+23)-(15z+9) There's an invisible positive 1 in front of (7z+23). Distribute.

7z+23-(15z+9) Distribute the negative sign among 15z and 9.

7z+23-15z-9 Now, combine the like terms, 7z, and -15z. 7z - 15z

-8z+23-9 Combine the like terms, 23 and -9. 23 - 9

-8z +14

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Find slope A.1/2 B.-1/2 C.-2 D.2

fomenos

Answer:

Option B, -1/2

Step-by-step explanation:

The slope is change in y over change in x.

Since this line is facing downward, we already know that the slope is negative.

To find the ratio, find the change in y and divide the change in x.

Change in y = -1

Change in x = 2

Change in y over change in x: -1/2

Answer: Option B, -1/2

6 0

2 years ago

An artist is creating a large butterfly sculpture outside a museum. There is a circular dot on each wing made out of a metal rin

IgorLugansk [536]

$\bf \textit{"The distance around each dot is 24}\pi \textit{ inches."}\\\\
\textit{circumference of a circle}\\\\
C=2\pi r\quad 
\begin{cases}
r=radius\\
-----\\
C=24\pi 
\end{cases}\implies 24\pi =2\pi r\implies \cfrac{24\pi }{2\pi }=r
\\\\\\
\boxed{12=r}\\\\
-------------------------------\\\\
\textit{area of a circle}\\\\
A=\pi r^2\quad 
\begin{cases}
r=radius\\
-----\\
r=12
\end{cases}\implies A=\pi 12^2\implies A=144\pi$