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2 years ago

5/7 of a number is 55 work out the number. please help with this question

Mathematics

2 answers:

Alecsey [184]2 years ago

6 0

Answer:

Step-by-step explanation:

Hope this helps..

Good luck.

MatroZZZ [7]2 years ago

5 0

The answer is 77

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Find the critical numbers of the function. (Enter your answers as a comma-separated list. Use n to denote any arbitrary integer

lyudmila [28]

$f(\theta)=10\cos\theta+5\sin^2\theta$

then the derivative is

$f'(\theta)=-10\sin\theta+10\sin\theta\cos\theta$

Critical points occur where $f'(\theta)=0$ . This happens for

$-10\sin\theta+10\sin\theta\cos\theta=0$

$-10\sin\theta(1-\cos\theta)=0$

$\implies-10\sin\theta=0\text{ or }1-\cos\theta=0$

In the first case, we find

$-10\sin\theta=0\implies\sin\theta=0\implies\theta=n\pi$

In the second,

$1-\cos\theta=0\implies\cos\theta=1\implies\theta=2n\pi$

So all the critical points occur at multiples of $\pi$ , or $n\pi$ . (This includes all the even multiples of $\pi$ .)

3 0

3 years ago

A train leaves at 14:56 and arrives at 16:43. It travelled at an average speed of 135 km/h. How far did it travel? Give your ans

Firlakuza [10]

Answer:

240.8

Step-by-step explanation:

→ Calculate time taken

16:43 - 14:56 = 1 hour and 47 minutes

→ Write the speed formula and make distance the subject

Speed = Distance ÷ Time ⇔ Distance = Speed × Time

→ Convert 1 hour and 47 minutes into decimal format

1.78333333 or $1\frac{47}{60}$

→ Substitute values into formula

135 × $1\frac{47}{60}$ = 240.75

8 0

3 years ago

Sixty percent of what number is equal to 45 percent of 80?

Dovator [93]

Answer:

Step-by-step explanation:

60% * x = 45% * 80

Changing to decimal form

.60x = .45 *80

.60x =36

Divide each side by .60

.60x/.60 = 36/.60

x =60

6 0

3 years ago

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Liam’s is punting a picture she has green

Natali5045456 [20]

That makes no sense at all!!!

7 0

3 years ago

Jeremiah always rides his bike to and from work the total length of the trip to and from work is 14.6 kilometers last month Jere

dezoksy [38]

Answer:

As per the given statement: Jeremiah always rides his bike to and from work the total length of the trip to and from work is 14.6 kilometers last month.

⇒ $\text{Total length of the trip to and fro from work last month} = 14.6 km$

Also, it is given that Jeremiah worked 18 days.

then;

$\text{Total distance he ride his bike} = 14.6 \times 18 = \frac{146}{10} \times 18 = \frac{146 \times 18}{10} = \frac{2628}{10}$

Simplify:

$\text{Total distance he ride his bike} = 262.8 km$

Therefore, 262.8 km did he rode his bike to and from work last month

8 0

3 years ago