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Stels [109]
4 years ago
7

Bob is three times as old as Mary. Four years from now, Bobwill be only twice as old as Mary. Find their present ages.

Mathematics
1 answer:
wolverine [178]4 years ago
8 0
Bob is 12.
Mary is 4.
12+4 = 16. 
4+4 = 8.
16/2 = 8.
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An equation was used to predict the number of possible enrollments in an afterschool program for the first 6 months of the year.
AysviL [449]
55 + 80 + 95 + 100 +115 +90 =535 actual enrollments. 75 + 80 +85 +90 +95 + 100 = 525 predicted enrollments. 535 - 525 = 10 residuals.
6 0
3 years ago
Vanessa has scored 45, 32, and 37 on her three math quizzes. She will take one more quiz and she wants a quiz average of at leas
zhenek [66]

45 + 32 + 37 = 114

114÷3 = 38

4 total quizzes,


 for a 40 average on 4 quizzes she needs 40*4 = 160 total points




for 3 quizzes she has 45 +32 +37 = 114 points


160-114 = 46, she needs at least a 46 on the 4th quiz


6 0
4 years ago
Read 2 more answers
Which expression is equivalent to - 1 2/5 + 2 1/3
Ulleksa [173]

Answer:

  • C. 2 1/3 - 1 2/5

Step-by-step explanation:

Let a = - 1 2/5 and b = 2 1/3

<u>We have a + b, lets compare with the options:</u>

  • A) a + (- b) = a - b, no
  • B) a - b, no
  • C) b + a = a + b, yes
  • D) b - a, no
6 0
3 years ago
Which of these expressions is equivalent to – 4(5 – 2x)?
Alekssandra [29.7K]

Answer:

-20+8x

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Construct a truth table for the logical operator NOR.
Rasek [7]

Answer:

A   B   A NOR B

F   F        T

F   T        F

T   F        F

T   T        F

Step-by-step explanation:

The logical operator NOR produces a result that is the negation of the logical operator OR.

The truth table for the logical operator NOR can be obtained by the negation of the results of the truth table for the logical operator OR.

Let A and B be the the logical values (or inputs). The operator OR produces a value of true if and only if at least one operand is true. The truth table for OR is:

A   B   A OR B

F   F       F

F   T       T

T   F       T

T   T       T

So, the truth table for NOR is:

A   B   A NOR B

F   F        T

F   T        F

T   F        F

T   T        F

Notice that the negation of OR (which is NOR) is obtained by changing the F by T and the T by F in the column of the results.

This table can also be writen with 0 instead of False and 1 instead of True.

5 0
3 years ago
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