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irina [24]
2 years ago
11

What’s the answer and could you explain it

Mathematics
1 answer:
Nadusha1986 [10]2 years ago
3 0
The answer is B.   Because there are 8 ribbons in all. 1 ribbon is black. so the equation would be 1/8. Assuming you don't draw the black ribbon on the first try, then you would try again. The second time you draw a ribbon you don't put the ribbon you drew back in. That means there are only 7 ribbons the second time. The 1 black ribbon is still in the bag than the equation would be 1/7. Then you add the two together. So it would be 1/8 + 1/7 = 1/15. Remember to only add the bottom numbers. not the top ones unless they are different colors or objects.
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If the sum of the digits of a number is divided by 2, then the original number is also divisible by 2
Marina CMI [18]

This is true but not for all numbers. Of course you can divide a number by 2 but if it’s an odd number the answer will be a decimal. But for example 24, the two digits are divisible by 2 and so is the original number. But for example 12, the digits aren’t divisible by 2 (the answer is 1.5) but the original number is.

3 0
2 years ago
One year, the population of a city was 99,000. Several years later it was 82,170. Find the percent decrease.
Mrac [35]
82170/99000=0.83
1-0.83=0.17
answer is 17%
5 0
3 years ago
Simplify 2(6(3.5+2.1))
Katarina [22]

Answer:67.2

Step-by-step explanation:

3.5+2.1=5.6

6 times 5.6 is 33.6 then 33.6 times 2 is 67.2

6 0
3 years ago
The range of set scores is found by subtracting the lowest score from the highest. The range set scores is 52, and the lowest sc
Assoli18 [71]

Answer:

98

Step-by-step explanation:

Add 52 and 46 together. You get 98. So the highest score is 98.

4 0
3 years ago
One day, a person went to a horse racing area. Instead of counting the number of humans an horses, he conuted 74 heads and 196 l
BigorU [14]
X = the number of humans and y = the number of horses.

x+y=74
2x+4y=196

Because the number of humans and horses together is 74, and the total number of legs (2 per every human, x, and 4 per every horse, y) is 196.  Then, just use elimination to solve.

-2(x+y=74)\\2x+4y=196\\\\-2x-2y=-148\\2x+4y=196\\\\2y=48\\y=24

So, now that you have y, you can plug it into the first equation to find x:

x+y=74\\x+24=74\\x=50

So, x = 50 and y = 24, so there are 50 humans and 24 horses.
The correct answer is B.
4 0
3 years ago
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