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Arlecino [84]
3 years ago
9

How many solutions does the following system of equations have?

Mathematics
1 answer:
True [87]3 years ago
6 0
We will use a method of substitution.
y = 5/2 x + 2 
2 y = 5 x + 4   ⇒  2 ( 5/2 x + 2 )= 5 x + 4
5 x + 4 = 5 x + 4
0 x = 0            ⇒  x, y ∈ R
Answer: D)   
This system has infinitely many solutions.
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Which angles are complementary? I'm not sure if its B.
Angelina_Jolie [31]

Answer:

You are right, it's B

Step-by-step explanation:

Complementary angles are angles that add up to 90 degrees.

4 0
3 years ago
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How can you tell when to use a discrete graph as opposed to using a continuous graph? Give an example of each.
sesenic [268]

Answer:

Continuous graphs have all real numbers

Discrete graphs have whole numbers

Step-by-step explanation:

7 0
4 years ago
For a trip, one high school rented and filled 5 vans and 6 buses with 187 students. Another high school instead fit its 176 stud
serious [3.7K]

Answer:

A bus can carry 22 students and a van can carry 11 students.

Step-by-step explanation:

Let the number of students bus can carry be 'b'.

Let the number of students van can carry be 'v'.

Given:

One High school:

Number of bus = 6

Number of vans = 5

Number of students = 187

So we can say that;

Number of bus multiplied by number of students bus can carry plus Number of vans multiplied by number of students van can carry is equal to Number of students.

framing in equation form we get;

6b+5v=187  ⇒ Equation 1

Also Given:

One High school:

Number of bus = 7

Number of vans = 2

Number of students = 176

So we can say that;

Number of bus multiplied by number of students bus can carry plus Number of vans multiplied by number of students van can carry is equal to Number of students.

framing in equation form we get;

7b+2v=176  ⇒ Equation 2

Now multiplying equation 2 by 5  we get;

5(7b+2v)=5\times176

35b+10v=880 ⇒ Equation 3

Now multiplying Equation 1 by 2 we get;

2(6b+5v)=187\times2

12b+10v=374  ⇒ Equation 4

Subtracting equation 4 from equation 3 we get;

35b+10v-(12b+10v)=880-374\\\\35b+10v-12b-10v= 506\\\\23b =506\\\\b =\frac{506}{23} =22\ students

Substituting value of b in equation 2 we get;

7b+2v =176\\\\7\times 22+2v =176\\\\154+2v=176\\\\2v=176-154\\\\2v =22\\\\v =\frac{22}{2}=11\ students

Hence A bus can carry 22 students and a van can carry 11 students.

6 0
3 years ago
Rewrite the expression without using grouping symbol 7(x - 20)
Kitty [74]
7 (x - 20)

use distribution method

7x - 140
6 0
3 years ago
Which fraction is the largest <br><br> 1/4<br><br> 2/4 <br><br> 1/3<br><br> 2/3<br><br> 1/5
mojhsa [17]

Answer:

2/3

Step-by-step explanation:

The largest number with a given numerator is the one with the smallest denominator.

Of 1/4, 1/3, 1/5, the largest is 1/3.

Of 2/4, 2/3, the largest is 2/3.

Since 1/3 and 2/3 have the same denominator, the largest is the one with the largest numerator: 2/3.

8 0
4 years ago
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