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aivan3 [116]
3 years ago
15

Brian has a model collection of cars, trains, amd fire engines. He has 28 cars. The number of fire engines is 2 times the number

of trains. He has 67 models in all. How many of each type of model does he have?
Mathematics
2 answers:
zlopas [31]3 years ago
4 0
<span>67-28 = 39 other than cars. Since 1/3 are fire engines then 39/3 = 13, the number of fire engines and 39 -13 = 26, the number of trains.</span>
emmainna [20.7K]3 years ago
4 0
He has 28 cars 26 fire engines and 13 trains
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Please explain also! I am not here just to get answers, I am here to understand. Thank you!
kolezko [41]

To help solve this, we need to use the slope formula.

(y2 - y1) / (x2 - x1). We get these values by picking two points on a line.

For JL, we will pick points (-5, -3) and (-2, -4).

y1 = -4

y2 = -3

x1 = -2

x2 = -5.

Let's plug these into our formula.

(-3) - (-4) / (-5) - (-2) = -1/3

For LN, we will pick points (-2, -4) and (7, -7).

y1 = -7

y2 = -4

x1 = 7

x2 = -2.

Lets plug these values into our equation.

(-4) - (-7) / (-2) - (7) = -1/3

Therefore,

(-3) - (-4) / (-5) - (-2) = (-4) - (-7) / (-2) - (7)

The correct answer is G.

3 0
4 years ago
Factories 4a² - 6ab​
anyanavicka [17]

Answer:

2a(2a-3b)

Step-by-step explanation:

4 and 6 have a common factor 2.

a^2 and ab have a common factor a.

So we can factor out 2a:

4a^2-6ab

2a(\frac{4a^2}{2a}-\frac{6ab}{2a})

2a(\frac{2a(2a)}{2a}-\frac{3b(2a)}{2a})

2a(2a-3b)

7 0
3 years ago
Read 2 more answers
Find the nth term of each of the sequences.<br> (a) 16, 19, 22, 25, 28, ...<br> (b) 1,3,9,27,81,...
juin [17]

Answer:

a) 16, 19, 22, 25, 28, 31, 34, 37, 40

b) 1, 3, 9, 27, 81, 243, 729, 2187

<h3>Explanation:</h3>

a) Add 3 on every number.

b) Multiply every number by 3.

6 0
3 years ago
Question is down below here ⬇️ PART 4
jok3333 [9.3K]

Answer:

4x+11

Step-by-step explanation:

3 0
3 years ago
how to determine triplets of side lengths that can form a triangle 12cm,14cm,18cm and 2in,3in,9in and6m,8m,10m
Flura [38]
1 and3can form the triangle As the sum of 2sides is greater then the 3rdside Like for first one 12+14>18 26>18 Yes 14+18>12 32>12 Yes 12+18>14 30>14 Yes so the first set of sides can become a triangle
4 0
3 years ago
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