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Klio2033 [76]
3 years ago
13

Simplify 9a + 5b - 7a + 6b

Mathematics
2 answers:
arlik [135]3 years ago
7 0
9a + 5b - 7a + 6b 

(9a-7a)+(5b+6b)
  \text{Gather like terms} 

2a+11b  \text{Solution}
Dmitrij [34]3 years ago
3 0
It 
=2a+11b
Get photomath its great!
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5) 5x-4= 20<br> у = 3х - 12<br> solve
vredina [299]

Answer:

Step-by-step explanation:

5x-4=20

5x=24: x=24/5

y=3x-12

y=3(24/5)-12

y = (72-60)/5

y=12/5

6 0
2 years ago
An arts academy required there to be 4 teachers for every 64 students and 6 tutors for every 48 students.How many students does
irina [24]

Answer:

1. 16 teachers  2. 8 tutor  3. 6 teachers

Step-by-step explanation:

3 0
2 years ago
Can someone give me the answer
Tasya [4]

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8 0
3 years ago
Tickets for a minor league baseball game for an adult and two children cost a total of $21 the adult ticket is three dollars mor
oksian1 [2.3K]

Answer:the cost of one child's ticket is $6

the cost of one adult ticket is $9

Step-by-step explanation:

Let x represent the cost of one child's ticket

Let y represent the cost of one adult ticket.

Tickets for a minor league baseball game for an adult and two children cost a total of $21. This means that

2x + y = 21 - - - - - - - - - - 1

The adult ticket is three dollars more than a child's ticket. This means that

y = x + 3

Substituting y = x + 3 into equation 1, it becomes

2x + x + 3 = 21

3x + 3 = 21

3x = 21 - 3 = 18

x = 18/3 = 6

y = x + 3 = 6 + 3

y = 9

6 0
3 years ago
The average speed to go by car from home to college is 30 miles per hour. The average speed to go back home from college is 20 m
Levart [38]

Answer:

24 mph for both 60 miles and 40 miles.

Step-by-step explanation:

We need to find how long it takes to get to college and from it.

Speed x time (x) = Distance (60)

30x = 60

x=2

It takes two hours to get to college

20x = 60

x = 3

It takes 3 hours to get back. It's a total of 5 hours, 2 hours at 30mph and 3 at 20. Now we need to find the average

30+30+20+20+20=120

120/5= 24

The average speed for the round trip is 24.

To do the second part, we follow the same process, but replace 60 with 40 for distance.

30x=40

x= 1.33

20x=40

x=2

We can add the total distance and divide by total time to find the average.

The total distance is 80. Time is 3.33

80/3.33=24

The average speed is still 24.

3 0
3 years ago
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