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3 years ago

Evaluate 2.625-(-6)

Mathematics

1 answer:

Lunna [17]3 years ago

8 0

2,625 - (-6) =

= 2, 625 + 6

= 8, 625

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The track team is trying to reduce their time for a relay race. First they reduce their time by 2.1 minutes. Then they are able

klemol [59]

Answer: 15.7 minutes

Step-by-step explanation:

Let x be the time in the beginning (in minutes).

Given: The track team is trying to reduce their time for a relay race.

First they reduce their time by 2.1 minutes.

Then they are able to reduce that time by 10

If their final time is 3.96 minutes, then

x-t1-t2= 3.6
x= 3.6+ t1+ t2
x= 3.6+ 2.1+ 10
x= 15.7

Hence, their beginning time was 15.7 minutes.

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3 years ago

What is 3(x+2)=15?????

Nitella [24]

Answer:

Step-by-step explanation:

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3 years ago

What will the movement of a point which is on the surface of a circle touching the ground at the same time, if the circle turns

lesya692 [45]

Answer:

183.26cm

Step-by-step explanation:

Radius of the Circle = 50cm

Let the point be at A

It turns forward 210 degrees to B.

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The movement of the point from A to B will be the length of the arc AB.

$\text{Length of an arc }=\dfrac{\theta}{360} \times 2\pi r \\$Therefore, the distance moved forward$\\=\dfrac{210}{360} \times 2\times\pi \times 50\\\\=183.26$ cm$

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4 years ago

A store had 235 MP3 players in the month of January. Every month, 30% of the MP3 players were sold and 50 new MP3 players were s

ozzi

We let f(0) = 235
After 1 month,
f(1) = 235*(0.7) + 50
After 2 months,
f(2) = 235*0.7*0.7+ 50*2
And so on..

Therefore, we can represent the number of MP3 players in the store after n months with the function:
f(n) = 235 (0.7)^n + 50n

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3 years ago

(HELP ME )Jolie played dodgeball in PE. In one game, Jolie threw a total of 75 balls at her

ollegr [7]

Answer:

40%

Step-by-step explanation:

A percent is;

$\frac{part}{whole} = \frac{x}{100}$

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$\frac{30}{75} = \frac{x}{100}$

Simplify $\frac{30}{75}$ by dividing the numerator and denominator by 15.

$\frac{2}{5}$

Now the equation is;

$\frac{2}{5}=\frac{x}{100}$

Typically, one would solve a proportion by doing cross products, but in this case, it is easier to think about it intuitively. Since 5 is a factor of 100 (5 * 20 = 100), then all one has to do is multiply $\frac{2}{5}$ by 20 to get the answer (on the numerator).

x = 40

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3 years ago

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