All categories

3 years ago

Determine the solution to the system of equations {4x+15y=40

Mathematics

1 answer:

oee [108]3 years ago

8 0

Step-by-step explanation:

4x+15y= 40-5y= 20

= 4x+15y+5y= 40-20

4x+20y= 20

You might be interested in

In a survey of 400 randomly selected people, it was determined that 22 play soccer. What is the probability that a randomly sel

insens350 [35]

Answer:

5.5% probability that a randomly selected person plays soccer

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

Desired outcomes:

People surveyed who play soccer, so $D = 22$

Total outcomes:

Total people surveyed, so $P = 400$

What is the probability that a randomly selected person plays soccer?

$P = \frac{D}{T} = \frac{22}{400} = 0.055$

5.5% probability that a randomly selected person plays soccer

6 0

3 years ago

Can someone please help me?

Katyanochek1 [597]

The matrix represents the system:

-3x+5y=15

2x+3y=-10, which is choice c.

We can see it more clearly from the way we multiply matrices, as follows:

$
 \left[ {\begin{array}{cc}
 -3 & 5 \\
 \ 2 & 3 \\
 \end{array} } \right]
\] \cdot \[
 \left[ {\begin{array}{c}
 x \\
 y \\
 \end{array} } \right]
\]= \left[ {\begin{array}{c}
 -3\cdot x+5\cdot y \\
 2\cdot x+3\cdot y \\
 \end{array} } \right]
\]= \[ \left[ {\begin{array}{c} 15 \\ -10 \\ \end{array} } \right]$

Answer: C

7 0

3 years ago

What is the correlation

RideAnS [48]

Answer:

type=positive

Correlation refers to the degree of correspondence or relationship between two variables.

8 0

3 years ago

What equations are equivalent to -4+(4+5)?

Igoryamba

Answer:

-4 + 9

9- 4

Step-by-step explanation:

4 0

3 years ago

Brian has basketball cards and 5 baseball cards what fraction of brians card are baseball cards

stich3 [128]

How many basketball cards

8 0

3 years ago