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3 years ago

What is 2 × 5 – 10 ÷ 2?

Mathematics

2 answers:

morpeh [17]3 years ago

5 0

Answer:

(2 x 5) - (10 ÷ 2)

10 - 5

5 is the answer

ryzh [129]3 years ago

5 0

Answer:

Step-by-step explanation:

2 * 5 - 10 / 2 → first we do the multiplications

10 - 10 / 2 → no the division

10 - 5 → and finally the subtraction

5 → final answer

Hope it helped,

BioTeacher101

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If 20% of a number is 8, find 10% of that number.

Gemiola [76]

Answer:

20%=8

10%=?

by cross multiplications,

10×8=80

80÷20=4

Hence the answer is 4.

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2 years ago

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Paladinen [302]

Using the slope-intercept form, the slope is

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3 years ago

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In a lab experiment, a student is trying to apply the conservation of momentum. Two identical balls, each with a mass of 1.0 kg.

muminat

Answer:

Trial- 2 shows the conservation of momentum in a closed system.

Step-by-step explanation:

Given: Mass of balls are $m= 1.0\ kg$

Conservation of momentum in a closed system occurs when momentum before collision is equal to momentum after collision.

Let initial velocity of ball $A\ is\ u_1$
Initial velocity of ball $B\ is\ u_2$
Final velocity of ball $A\ is\ v_1$
Final velocity of ball $B\ is\ v_2$
Momentum before collision $= mu_1+mu_2$
Momentum after collision $=mv_1+mv_2$

Now, According to conservation of momentum.

Momentum before collision = Momentum after collision

$mu_1+mu_2=mv_1+mv_2$

We will plug each trial to this equation.

Trial 1

$mu_1+mu_2=mv_1+mv_2\\1.0(1)+1.0(-2)=1.0(-2)+1.0(-1)\\1-2=-2-1\\-1=-3$

Trial 2

$mu_1+mu_2=mv_1+mv_2\\1.0(.5)+1.0(-1.5)=1.0(-.5)+1.0(-\.5)\\.5-1.5=-.5-.5\\-1=-1$

Trial 3

$mu_1+mu_2=mv_1+mv_2\\1.0(2)+1.0(1)=1.0(1)+1.0(-2)\\2+1=1-2\\3=-1$

Trial 4

$mu_1+mu_2=mv_1+mv_2\\1.0(.5)+1.0(-1)=1.0(1.5)+1.0(-1.5)\\.5-1=1.5-1.5\\-.5=0$

We can see only Trial 2 satisfies the princple of conservation of momentum. That is momentum before collison should equal to momentum after collision.

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3 years ago

At Lorenzo's Hats, 60% of the 60 hats are baseball caps. How many baseball caps are there?

Troyanec [42]

Answer:

Step-by-step explanation:

60 times 60% (0.6) = 36

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2 years ago

The amount of water flowing into a tank doubles every minute. The tank if full in an hour. When is the tank half full.

Annette [7]

Since the water in the tank is doubling each minute, that means the minute before the tank was full, it was half full.
If it fills in an hour, which is 60 minutes, than that is double what it was 1 minute ago.

The invert of doubling is halving.
The tank was half full a minute before it was full.
It was full after 60 minutes.
This means it was half full after 59 minutes.

Answer:
The tank was half full after 59 minutes.

Hope this helps!

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3 years ago