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3 years ago

Sandy can jog 3 2/5miles in 5/6 hours. Find her average speed in miles per hour

Mathematics

2 answers:

Alla [95]3 years ago

8 0

Answer:

4 2/25

Step-by-step explanation:

Distance ÷ Time = Average

3 2/5 ÷ 5/6 =

3 2/5 x 6/5 = 4 2/25

fomenos3 years ago

8 0

4 2/5 ima say is the answer

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3 years ago

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9sin(2x) sin (x) = 9cos(x)

nikdorinn [45]

Answer:

$\sin(2x) = 2 \sin(x) \cos(x) \\ 9( 2 \sin(x) \cos(x) ) \sin(x) = 9 \cos(x) \\ 18 { \sin}^{2} (x)9 \cos(x) - 9 \cos(x) = 0 \\ 9 \cos(x) (2{ \sin}^{2} (x) - 1) = 0 \\ 9 \cos(x) = 0 \: or \: 2{ \sin}^{2} (x) - 1 = 0 \\ \sin(x) = \pm \frac{1}{ \sqrt{2} } \\ \cos(x) = 0 \\ x = { \cos}^{ - 1} (0) \\ x = \frac{ \pi}{2} = 90 \degree \\ x = \frac{ \pi}{2} + 2\pi \: n \: \forall \: n \: \in \: \Z \\ = 90 \degree + 360\degree\: n \: \forall \: n \: \in \: \Z \\ = \pm\frac{ \pi}{4} \pm2\pi \: n \: \forall \: n \: \in \: \Z \\ x = \pm45\degree \pm 360\degree\: n \: \forall \: n \: \in \: \Z$

8 0

2 years ago

Find the equation of the line passing through the points (3,-2) and (4,6) in slope intercept form.

noname [10]

Hey!

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They already give us the slope, so we can solve the y-intercept.

We can use (3, -2).

y = 8x + b

-2 = 8(3) + b

-2 = 24 + b

-2 - 24 = 24 + b - 24

-26 = b

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Hence, the answer is $\Large\boxed{\mathsf{y~=~8x~+~-26}}$

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Hope This Helped! Good Luck!

4 0

3 years ago

HELP ME PLEASE ECPLAIN WHY

stiv31 [10]

Answer:

A≈110.11

using formula 1/4 $\sqrt5(5+2\sqrt5)a2$

Step-by-step explanation:

8 0

3 years ago

Please show the steps!!

Mashutka [201]

1. 1/5 = x - 9 / x

2. Cross multiply x = 5 (x - 9)

3. Distribute x = 5x - 45

4. Move the variable and change the sign x - 5x = -45

5. Add like terms -4x = -45

6. Divide x = 45 / 4

So the solution is x = 45 / 4 or 11.25

6 0

3 years ago

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