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Montano1993 [528]
3 years ago
15

When 25 is subtracted from seven times a certain number the result is 136. What is the number?

Mathematics
2 answers:
enyata [817]3 years ago
7 0
136 the number is 13
6
Citrus2011 [14]3 years ago
5 0
37.28 is the answer
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Consider the following histogram.
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1 year ago
Devin has a collection of 40 model vehicles which consists of 25 different cars and 15 different trucks. He selects 8 to display
KiRa [710]

Answer:

The number of ways to select 3 cars and 5 trucks is 69,06,900.

Step-by-step explanation:

In mathematics, the procedure to select k items from n distinct items, without replacement, is known as combinations.

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It is provided that:

Number of different cars, <em>n</em> (C) = 25.

Number of different trucks, <em>n</em> (T) = 15.

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{25\choose 3}=\frac{25!}{3!(25-3)!}=\frac{25\times24\times23\times22!}{3!\times22!}=2300

There are 2300 ways to select 3 cars.

Compute the number of ways in which he can select 5 trucks from 25 different trucks as follows:

{15\choose 5}=\frac{15!}{5!(15-5)!}=\frac{15\times14\times13\times12\times 11\times10!}{5!\times10!}=3003

There are 3003 ways to select 5 trucks.

Compute the total number of ways to select 3 cars and 5 trucks as follows:

n (3 cars and 5 trucks) = n (3 cars) × n (5 trucks)

                                     ={25\choose 3}\times {15\choose 5}\\=2300\times 3003\\=6906900

Thus, the total number of ways to select 3 cars and 5 trucks is 69,06,900.

7 0
2 years ago
For the following system, use the second equation to make a substitution for y in the first equation. 2 x + y = 5 y + 3 = 2 x
Anon25 [30]
2x+y=5
y+3=2x
y+3-3 = 2x-3
y= 2x -3

2x + y =5
2x + 2x -3 = 5


8 0
3 years ago
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Help me Can somebody help me​
Andrew [12]

Answer:

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