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3 years ago

11

Mark spent $21 on a magazine and some candy bars. If the magazine cost $5 and each candy bar cost $2, then how many candy bars d

id he buy?

2 answers:

Mama L [17]3 years ago

8 0

8 candy bars is the answer

Lana71 [14]3 years ago

6 0

Answer:8 candy bars because 21-5=16/2=8 candy bars.

Step-by-step explanation:

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3 years ago

Sin (3x+15) = Cos (7x-2)<br><br> Find value of x

11Alexandr11 [23.1K]

$\bf \textit{Cofunction Identities}
\\ \quad \\
\boxed{sin\left(\frac{\pi}{2}-{{ \theta}}\right)=cos({{ \theta}})}\qquad 
cos\left(\frac{\pi}{2}-{{ \theta}}\right)=sin({{ \theta}})
\\ \quad \\ \quad \\
tan\left(\frac{\pi}{2}-{{ \theta}}\right)=cot({{ \theta}})\qquad 
cot\left(\frac{\pi}{2}-{{ \theta}}\right)=tan({{ \theta}})
\\ \quad \\ \quad \\
sec\left(\frac{\pi}{2}-{{ \theta}}\right)=csc({{ \theta}})\qquad 
csc\left(\frac{\pi}{2}-{{ \theta}}\right)=sec({{ \theta}})\\\\
-------------------------------\\\\$

$\bf \begin{array}{lcllclll}
sin(&90^o-\theta)&=&cos(&\theta)\\
&\uparrow &&&\uparrow \\
&3x+15&&&7x-2\\
&\downarrow \\
&90-(7x-2)
\end{array}
\\\\\\
90-(7x-2)=3x+15\implies 90-7x+2=3x+15
\\\\\\
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3 years ago

What is the volume of a cylinder with a radius of 5 centimeters and height of 2.5 centimeters?

IRISSAK [1]

Answer:

Step-by-step explanation:

The formula for volume of a cylinder is

V = πr²h where r is the radius and h is the height.

We are given r = 5 and h = 2.5, plug those values in and simplify...

V = π(5²)(2.5)

V = π(25)(2.5)

V = 62.5π

7 0

4 years ago