Yesterday, there were 80 problems assigned for homework. Harry did 20% of them correctly. How many problems did Harry get right?

Mathematics

2 answers:

konstantin123 [22]3 years ago

4 0

Answer:

16 i think

Step-by-step explanation:

Len [333]3 years ago

3 0

Answer:16

...........................

You might be interested in

Kim, Laura and Molly share £385

trapecia [35]

Set x equal to the amount of money Kim gets, and y for Molly's money.

x = 2/5y, since the ratio is 2:5.
y = 105 + x, since Molly has 105 more pounds than Kim.

Substitute x into this equation, so that y = 105 + 2/5y. Subtract 2/5y from both sides to get 3/5y = 105. Divide each side by 0.6 (equivalent to 3/5) and you get y = 175, which is how much Molly has. Kim gets 2/5 of Molly's share (or 105 fewer pounds), so she has 70.

70 + 175 (Kim and Molly's shares) is equal to 245. Therefore, Laura receives the remaining 140 pounds.

140/385 = a/100
Cross multiply so that 385a is 14000. Divide by 385 to get 36.4 (rounded).

Thus, Laura receives about 36.4% of the total money. Hope this helps (:

5 0

3 years ago

Sarah has gone four weeks. Micah has been recording the daily high temperature. During that time, the high temperature has been

pickupchik [31]

The experimental probability that the high temp will be below 45 F on the 29th day is, 4.5 out of 29 days, that is because 20 of the days have had lower temperatures, so they left 9 days of and from those 9 days, they could be lower or greater that 45F (50% each side), that is:
4.5/29 = 0.155 = 15.5%
that is the exp probability

8 0

3 years ago

At the library you find nine books on a certain topic the librarian tells you that 55% of the books on this topic have been sign

sleet_krkn [62]

9 x 0.55 = 4.95, which can be rounded to the ones place.

5 books remain.

4 0

3 years ago

What is angle BCD A. 80° B. 90° C. 100° D. 110°

alexgriva [62]

Answer:

Step-by-step explanation:

it is like your hands hold your hand put to make a l shape that is 90⁰ and imaine that more opened out.