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eduard
3 years ago
15

I need some help with this math question

Mathematics
1 answer:
Ilia_Sergeevich [38]3 years ago
7 0

Answer:

the answer is number 2 and 4

Step-by-step explanation:

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The length of the radius of a bicycle wheel is 13 in. Which of the following is closest to the distance the wheel will travel in
chubhunter [2.5K]

Answer:

Step-by-step explanation:

r=13in

Perimeter of a circle is 2πr

P=2×22/7×13

P=81.71in.

If it will make 3 revolution then it will have move 3 times it perimeter

3×81.71

245.14in

The distance the wheel will traveled is 245.14in

4 0
3 years ago
Tanx-cotx / sinxcosx =sec^2-csc^2x. Please show all steps. 
Katarina [22]
\bf \cfrac{tan(x)-cot(x)}{sin(x)cos(x)}\implies \cfrac{\frac{sin(x)}{cos(x)}-\frac{cos(x)}{sin(x)}}{sin(x)cos(x)}\implies \cfrac{\frac{sin^2(x)-cos^2(x)}{cos(x)sin(x)}}{\frac{sin(x)cos(x)}{1}}
\\\\\\
\cfrac{sin^2(x)-cos^2(x)}{cos(x)sin(x)}\cdot \cfrac{1}{sin(x)cos(x)}\implies \cfrac{sin^2(x)-cos^2(x)}{cos^2(x)sin^2(x)}
\\\\\\
\textit{and now, we distribute the denominator}
\\\\\\
\cfrac{sin^2(x)}{cos^2(x)sin^2(x)}-\cfrac{cos^2(x)}{cos^2(x)sin^2(x)}\implies 
\cfrac{1}{cos^2(x)}-\cfrac{1}{sin^2(x)}

and surely you know what that is

3 0
3 years ago
Emily practices piano for 2/3 of an hour on Monday and 1/2 hour on Wednesdays. How many hours does Emily spend practicing piano
Sergeu [11.5K]

Answer:

50 minutes

Step-by-step explanation:

Given:

\bullet \ \ \text{Monday:} \ \dfrac{2}{3} \times \text{Hour}\\\\\bullet \ \text{Wednesday:} \ \dfrac{1}{2} \times \text{Hour}

Since Emily only practiced on Monday and Wednesday, the sum of time on both days is the time Emily practiced on the piano for a week.

\implies \text{Monday + Wednesday = Total time practiced on piano for a week}

<u>Substitute the times in the equation</u>

\implies (\dfrac{2}{3}  \times \text{Hour}) + (\dfrac{1}{2}  \times \text{Hour}) = \text{Total time practiced on piano for a week}

<u>Simplify the equation</u>

\implies (\dfrac{2}{3}  \times 60 \ \text{minutes}) + (\dfrac{1}{2}  \times 60 \ \text{minutes}) = \text{Total time practiced on piano for a week}

\implies (20 \ \text{minutes}) + (30 \ \text{minutes}) = \text{Total time practiced on piano for a week}

\implies \boxed{50 \ \text{minutes} = \text{Total time practiced on piano for a week}}

4 0
2 years ago
1. expand 4³
arlik [135]

Answer:

1. 64

2. 7

3. 1, 2, 4, 8, 16

4.

5. 36

6. 5

7. 13

4 0
3 years ago
Help ASAP please !!!!
Bad White [126]

Answer:

Don't Understand.

Step-by-step explanation:

Need more Information.

3 0
3 years ago
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