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olchik [2.2K]
3 years ago
10

What is an equivalent expression to 9(2a+1)

Mathematics
2 answers:
Angelina_Jolie [31]3 years ago
7 0

Answer:

18a+9

Step-by-step explanation:

Use the distribution property to expand the expression to:

9*(2a) + 9(1) = 18a + 9

storchak [24]3 years ago
4 0

Answer:

(9 x 2A) + 9

Step-by-step explanation:

just do the multiplication separately

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x+2y+2z=3. 2x-2y-z=3. x-2z=-5​
d1i1m1o1n [39]

Answer:

x = 1, y = -2, z = 3.

Step-by-step explanation:

x + 2y + 2z = 3      A

2x -2y - z = 3         B

x - 2z = -5              C

If we add equations A and B we eliminate y:

3x + z = 6       E

Multiply E by 2 :

6x + 2z = 12    F

Adding C and F we get:

7x = 7

x = 1.

Plug this into equaton C:

1 - 2z = -5

-2z =  -5 - 1 = -6

z = 3.

Now plugging x = 1 and z = 3 in equation A:

1 + 2y + 2(3) = 3

2y = 3 - 1 - 6 = -4

y = -2.

8 0
2 years ago
A cube-shaped water tank having 6 ft side lengths is being filled with water. The bottom is solid metal but the sides of the tan
Mekhanik [1.2K]

Answer:

0.033 ft

Step-by-step explanation:

Let g = 32.2 ft/s2 and h be the maximum height that water can be filled before the sides shatter.

Pressure is distributed from 0 to maximum at the bottom like the following equation:

P = \rho gh

So the force generated by water pressure on the side of the tank is

F = PA = \rho ghs/2

where s = 6ft is the side length of the tank. This force cannot be larger than 200lb

\rho ghs/2 \leq 200

62.4*32.2*h*6/2 \leq 200

h \leq 0.033 ft

4 0
3 years ago
Question#10 will give brainliest!
Amiraneli [1.4K]

Answer:

B. isolate the x^{2} by using inverse operations.

Step-by-step explanation:

Hope this helps! Brainliest would be much appreciated! Have a great day! :)      

6 0
2 years ago
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Express 3km 2m as a decimal of 1km.
puteri [66]

Answer:

3.002 km

Step-by-step explanation:

1000 m = 1 km

1 m = 0.001 km

3 km + 2 m = 3 km + 2(0.001 km)

3 km + 2(0.001 km) = 3.002 km

6 0
3 years ago
Find the area of a parallelogram with a base of 5cm and height of 15 cm
Anni [7]

Answer:

think about it right now its easy or use a calculator

Step-by-step explanation:

amazing

7 0
3 years ago
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