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2 years ago

78 is three times a number

Mathematics

2 answers:

Sveta_85 [38]2 years ago

7 0

26. Because 78/3=26.

Evgen [1.6K]2 years ago

5 0

78 = 3x <== ur equation
78/3 = x
26 = x...ur number

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As a motorcycle accelerates at 5.1 m/s2, its speed changes from 16 km/h to 118 km/h. How long does this take?

ser-zykov [4K]

Acceleration (a) = 5.1 m/s²
Initial speed (u) = 16 km/h ⇒ $\frac{16*1000}{3600}$ m/s ≈ 4.5m/s
Final speed (v) =118 km/h ⇒ $\frac{118*1000}{3600}$ m/s ≈ 32.8m/s

Distance(S) travel in that particular instant is carried out by 'Third equation of motion' i.e., v² = u² + 2aS

So, When all quantities are in S.I. unit then,
putting the values in the equation of motion,

As we have to carry out the distance covered,
2·a·S = v² - u²
S = $\frac{ v^{2} - u^{2} }{2a}$
Putting values in derived equation,
⇒ S = $\frac{ (32.8)^{2} - (4.5)^{2} }{2*(5.1)}$
⇒ S = $\frac{ 1075.84 - 20.25}{10.2}$
⇒ S = $\frac{1055.59}{10.2}$
⇒ S ≈ 103.489 m

The total distance covered in that given condition is approx. 103.289 m.

8 0

3 years ago

Read 2 more answers

A bicycle shop is selling $500 bikes at 10% off. If the sales tox is 7%, how much will the bike cost

baherus [9]

Answer:

Step-by-step explanation:

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2 years ago

At the beach, 29% of people are on the boardwalk and 26% are on the sand. If the rest are in the water, what percentage of peopl

natali 33 [55]

Answer:

45% of the people are in the water

Step-by-step explanation:

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2 years ago

A walk-in medical clinic believes that arrivals are uniformly distributed over weekdays (Monday through Friday). It has collecte

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Answer:

The degrees of freedom are given by;

$df =n-1= 5-1=4$

The significance level is 0.1 so then the critical value would be given by:

$F_{cric}= 7.779$

If the calculated value is higher than this value we can reject the null hypothesis that the arrivals are uniformly distributed over weekdays

Step-by-step explanation:

For this case we have the following observed values:

Mon 25 Tue 22 Wed 19 Thu 18 Fri 16 Total 100

For this case the expected values for each day are assumed:

$E_i = \frac{100}{5}= 20$

The statsitic would be given by:

$\chi^2 = \sum_{i=1}^n \frac{(O_i-E_i)^2}{E_i}$

Where O represent the observed values and E the expected values

The degrees of freedom are given by;

$df =n-1= 5-1=4$

The significance level is 0.1 so then the critical value would be given by:

$F_{cric}= 7.779$

If the calculated value is higher than this value we can reject the null hypothesis that the arrivals are uniformly distributed over weekdays

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2 years ago

What does expression equivalent mean?

Studentka2010 [4]

Answer:

Step-by-step explanation:

Equivalent expressions are expressions that are the same,even though they might look different. If you plug in the same variable value into equivalent expressions they will each give you the same value when you simplify.

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2 years ago