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marishachu [46]
2 years ago
6

A=5 btw Please help btw I’m in 7th Grade

Mathematics
1 answer:
AlexFokin [52]2 years ago
5 0

Answer:

1. a =3(2a) +5 and a= 6a+5

2. 47=3(2times 7) +5 and 47 =6 time 7 plus 5

Step-by-step explanation:

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R(x) = -13.85x2 + 1,660x<br> C(x) = 55,400 – 279x
iren2701 [21]

Answer:

What am I suppose to do?

Step-by-step explanation:

5 0
3 years ago
the perimeter of the floor of a room is 18 metre and its height is 3 cm what is the area of 4 walls of the room​
Lina20 [59]

Note: The height of the room must be 3 m instead of 3 cm because 3 cm is too small and it cannot be the height of a room.

Given:

Perimeter of the floor of a room = 18 metre

Height of the room = 3 metre

To find:

The area of 4 walls of the room.

Solution:

We know that, the area of 4 walls of the room is the curved surface area of the cuboid room.

The curved surface area of the cuboid is

C.S.A.=2h(l+b)

Where, h is height, l is length and b is breadth.

Perimeter of the rectangular base is 2(l+b). So,

C.S.A.=\text{Perimeter of the base} \times h

Putting the given values, we get

C.S.A.=18\times 3

C.S.A.=54

Therefore, the area of 4 walls of the room is 54 sq. metres.

7 0
3 years ago
"18 less than a number"
Dmitriy789 [7]

Answer:

18 is 1 and 8 put togother.

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Which expression represents each mathematical phrase?
olganol [36]

Answer:

Step-by-step explanation:

add 12 and a number: 12 + c

subtract a number from 12: 12 - c

divide a number by 12: c : 12 or c/12

multiply 12 by a number: 12 · c = 12c

5 0
2 years ago
X+8=17 what is the value of x makes the sentece true​
melisa1 [442]

Answer:

x = 9

Step-by-step explanation:

Step 1: Write equation

x + 8 = 17

Step 2: Solve for <em>x</em>

  1. Subtract 8 on both sides: x = 9

Step 3: Check

<em>Plug in x to verify it's a solution.</em>

9 + 8 = 17

17 = 17

7 0
3 years ago
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