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VLD [36.1K]
3 years ago
14

Find the value of 7 Y if 3 bracket Y - 1 bracket is equal 21​

Mathematics
1 answer:
lawyer [7]3 years ago
8 0

Answer:

7y = 56

Step-by-step explanation:

3(y - 1) = 21

Divide 3 on both sides:

y - 1 = 7

Add 1 to both sides:

y = 8

Multiply by 7 on both sides:

7y = 56

You might be interested in
Elena has bought 320 tropical fish for a museum display. She bought 7 times as many triggerfish as parrotfish. How many of each
STALIN [3.7K]
The total number of fish bought was 320. And you know she bought two types of fish. The best way to solve this is guess and check. It would be the fastest. So she bought 7 times as many trigger-fish as parrot fish that means the number of trigger-fish bought was 7p. This means 320 = 7p +p. So all you do is take educated guesses for the number of parrot fish and check if it is right. So if she bought 50 parrot fish. 7(50) + 50 = 400. Close but a bit high. Lets keep guessing. 7(35) + 35 = 245. So now we know the answer is between 50 and 35. So lets try 40. 7(40) + 40 =320. That works so we know she bought 40 parrot fish and 280 trigger-fish.
8 0
2 years ago
Pls help me with this one​
Over [174]

Answer:

8/7 x 9/10 is 72/70

7/10 x 9/8 is 63/80

10/7 x 9/8 is 90/56

7/9 x 8/10 is 56/90

4 0
3 years ago
there are 239 people in the first six rows of the movie theater if the same number of people are in the next six rows about how
bija089 [108]

Answer:

478 people

Step-by-step explanation:

All you need to do for this problem is simply multiply 239 by 2. If the first 6 rows are 239 people, and so are the next 6, that's all you need to do.

239*2=478

8 0
2 years ago
Plz help I need it by today
neonofarm [45]

Answer:

2688x^2 + 3640x + 1225

Step-by-step explanation:

multiply the expression

5 0
3 years ago
Read 2 more answers
PLZ HELP ASAP SOLID GEOMETRY
eduard
It should be E) none of the above because:

height = 0.5
Radius = 1
diameter = 2
7 0
2 years ago
Read 2 more answers
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