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vfiekz [6]
3 years ago
15

Plz help me get the answer to these

Mathematics
2 answers:
Pavlova-9 [17]3 years ago
8 0

Remove the brackets

-5a + 9b + 7a               combine -5a and 7a

7a - 5a + 9b

2a + 9b                        Answer

Don't go any further. There is nothing else to do. These are unlike terms and cannot be reduced or combined.

Colt1911 [192]3 years ago
4 0

Step-by-step explanation:

(-5a+9b)+7a\qquad\text{combine like terms}\\\\=(-5a+7a)+9b\\\\=2a+9b

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What is the equation of the line perpendicular to 3x+y=6 that passes through the point (0,8)​
Alekssandra [29.7K]

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3x + y = 6

y =  - 3x + 6

The coefficient of x is the slope of the line , So the slope of the above equation is -3 .

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Remember from now on ,

Product of multiplying the slopes of two lines which are perpendicular to each other , is -1 .

Thus ;

( - 3) \times (m) =  - 1

m is the slope of the line which we want.

- 3m =  - 1

Negatives simplifies

3m = 1

Divide sides by 3

\frac{3m}{3}  =  \frac{1}{3}  \\

m =  \frac{1}{3}  \\

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We have following equation to find the point-slope form of the linear functions :

y - y(0) = m(x - x(0))

x(0) and y(0) are the coordinates of the point which the line passed through.

y  - 8 =  \frac{1}{3} (x - 0) \\

y - 8 =  \frac{1}{3} x \\

Add sides 8

y =  \frac{1}{3} x + 8 \\

Done....

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6 0
2 years ago
What is the radius of a sphere with a volume of 7961 cm", to the nearest tenth of a<br> centimeter?
statuscvo [17]

Answer:

12.4 cm

Step-by-step explanation:

Use the sphere volume formula, V = \frac{4}{3}\pir³

Plug in the volume and solve for r, the radius:

V = \frac{4}{3}\pir³

7961 = \frac{4}{3}\pir³

1900.55 = r³

12.39 = r

So, the radius of the sphere is approximately 12.4 cm

6 0
3 years ago
19 Kayla's car can hold 15 gallons of gas. She gets 20.5 miles per gallon The tank is full. About how far can Kayla drive if she
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Answer:

D

Step-by-step explanation:

6 0
3 years ago
PLEASE HELP!
34kurt
It's both. Look at the gradients between one point then the one after it. It stays constant from one to the next. (Gradient is 2 by the way: (5-3)/(2-1)) 
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Answer:

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Step-by-step explanation:

$200 x .31 = $62.00

6 0
3 years ago
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