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UkoKoshka [18]
3 years ago
11

-2+d=-3 got no clue on how this works

Mathematics
1 answer:
Vsevolod [243]3 years ago
3 0

Answer:

<h2>d = -1</h2>

Step-by-step explanation:

-2+d=-3\\\\\mathrm{Add\:}2\mathrm{\:to\:both\:sides}\\-2+d+2=-3+2\\\\Simplify\\d=-1

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How can tell before you divide 387 by 4, that the first digit of the quotient in in the tens place?
iVinArrow [24]
You can tell before you divide 387 by 4, that the first digit of the qoutient is going to be in tens place, because 3 can't go into 4.
7 0
3 years ago
the map shows the route for a race. you are at a, which is 6000 feet from the first checkpoint b. the second checkpoint c is loc
Nimfa-mama [501]
<span>The two checkpoints are 4,920 ft. apart from each other. The total distance of the race is 15,840 ft. If checkpoint C half the distance between checkpoint B and the end of the race, the distance between Checkpoint B and the end of the race is 9,840 ft. Half of that distance is 4,920 ft.</span>
3 0
3 years ago
Jonathan’s class has 30 boys. Of the students in his class, 60% are girls. How many girls are in Jonathan’s class?
raketka [301]

Answer:

45 girls

Step-by-step explanation:

  • Remark
  • There are only 2 choices for gender. So if the class is 60% girls, the there must be 100 - 60 = 40% for the boys.
  • But we are told that the boys are 30 in number.
  • Let x = the total number of students.

Solution

  • 40/100 * x = 30              Change the % to a decimal
  • 0.4 x = 30                       Divide both sides by 0.4
  • 0.4 x / 0.4 = 30 / 0.4      Do the division
  • x = 30/0.4
  • x = 75 students in total

Formula

Total of Boys and Girls = Number of boys + number of girls.

Givens

  • Total = 75
  • Number of boys = 30

Solution II

  • 75 = x + 30                 Subtract 30 from each side
  • 75 - 30 = x +30 - 30
  • 45 = x
  • There are 45 girls in the class.
5 0
3 years ago
Five books and four pens cost $800. One book costs $120. How much does one pen cost?
cestrela7 [59]
The cost of each pen is $50, because you spend $600 on books leaving $200 to buy FOUR pens, making it $50 per pen
3 0
2 years ago
HELP PLEASE HURRY!!!!!!!!!!!!!
valentina_108 [34]

Answer:

i would say its b

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
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