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kicyunya [14]
3 years ago
6

(-3ab+7a-2) - (-9ab-4)

Mathematics
1 answer:
KonstantinChe [14]3 years ago
4 0
Given:
(-3ab+7a-2) - (-9ab-4)
Expand the expression using plus/minus rule.
-(-a)=a and -(a)=-a
=-3ab+7a-2 + 9ab +4
Add like terms
=6ab+7a+2

Answer: 6ab + 7a + 2
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The sum of 4 consecutive numbers is equal to the sum of the next 3 consecutive numbers. Find the largest number.​
timurjin [86]

Answer:

The answer is: The largest number is 15.

Step-by-step explanation:

Let n = the number

n + (n + 1) + (n + 2) + (n + 3) = (n + 4) + (n + 5) + (n + 6)

4n + 6 = 3n + 15

n = 9

Proof:

9 + 10 + 11 + 12 = 19 + 23 = 42

13 + 14 + 15 = 27 + 15 = 42

Hope this helps! Have an Awesome Day!!  :-)

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Answer:

6 neighbors

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What is the value of the y-coordinate for point S?
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Which expression simplifies to 4 √13<br><br><br> √208<br><br> √17<br><br> √29<br><br> √52
arsen [322]

Answer:

√208

Step-by-step explanation:

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7 0
3 years ago
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Please help answer these questions. My teacher said they were really easy but I just don't understand. Will mark brainliest !!!
kodGreya [7K]

Answer:

1.  A = 59

2.  A = 43

Step-by-step explanation:

If we have a right triangle  we can use sin, cos and tan.

sin = opp/ hypotenuse

cos= adjacent/ hypotenuse

tan = opposite/ adjacent


For the first problem, we know the opposite and adjacent sides to angle A

tan A = opposite/ adjacent

tan A = 8.8 / 5.2

Take the inverse of each side

tan ^-1 tan A = tan ^-1 (8.8/5.2)

A = 59.42077313

To the nearest degree

A = 59 degrees


For the second problem, we know the  adjacent side and the hypotenuse to angle A

cos A = adjacent/hypotenuse

cos A = 15.3/21

Take the inverse of each side

cos ^-1 cos A = cos ^-1 (15.3/21)

A = 43.23323481

To the nearest degree

A = 43 degrees


6 0
4 years ago
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