How do u get 55 from 3 7 12 2

69 POINTS !!!!!!!

Elden [556K]

Answer: Choice A) 3x3

The 3x3 refers to the number of rows and the number of columns in that order.

As another example, this matrix

$\begin{bmatrix}1 & 7 & 9\\13 & 41 & 2\\5 & 8 & 7\\92 & 3 & 5\end{bmatrix}$

is a 4x3 matrix because it has 4 rows and 3 columns.

7 0

3 years ago

The population of a town increases at a rate of 5% every year. The population of this town was 10,400 in 2017. What will the pop

galben [10]

Answer:

The population of the town in 2020 will approx. be 12,039.

Step-by-step explanation:

The initial population in the year 2017 = 10,400

Increase in population every yea r = 5%

Now, 5% of 10, 400 = $\frac{5}{100} \times 10, 400 = 520$

Hence, the population in the year 2018 = 10,400 + 520 = 10,920

Now, in the year 2019

5% of 10, 920 = $\frac{5}{100} \times 10, 920 = 546$

Hence, the population in the year 2019 = 10,920 + 546 = 11,466

Now, in the year 2020

5% of 11,466 = $\frac{5}{100} \times 11,466 = 573.3$

or, the population in the year 2020 = 11,466 + 573.3 = 12,039.3

The population of the town in 2020 will approx. be 12,039.

6 0

3 years ago

A suburban high school has a population of 1376 students. The number of students who participate in sports is 649. The number of

Afina-wow [57]

108 / 1376 is the probability that a student participates in both sports and music.

Step-by-step explanation:

It is given that,

A suburban high school has a population of 1376 students.

Let the event A be the no.of students participated in sports.
Let the event B be the no.of students participated in music.

The number of students who participate in sports is 649.

The number of students who participate in music is 433.

To find the probability of event A (sports) :

P(sports) = No.of students participated in sports / Total students.

⇒ 649 / 1376

∴ P(A) = 649 / 1376

To find the probability of event B (music) :

P(music) = No.of students participated in music / Total students.

⇒ 433 / 1376

∴ P(B) = 443 / 1376

From the question, we know that the probability that a student participates in either sports or music is 974 /1376.

∴ P(A∪B) = 974 / 1376

To find the probability that a student participates in both sports and music :

The formula used here is,

P(A∩B) = P(A) + P(B) - P(A∪B)

⇒ 649 / 1376 + 433 / 1376 - 974 /1376

⇒ 108 / 1376

∴ P(A∩B) = 108 / 1376

5 0

3 years ago

please help me, please I can’t fail this test!!❤️

kodGreya [7K]

Answer: i think A

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Quizzzz !! Plzzzz help

Tomtit [17]

QUESTION 1

a) The zeros of the function are the x-values at which the graph touches the x-axis.

From the graph, the zeros are;

$x=0,x=-4$

b) The axis of symmetry is the vertical line that goes through the vertex of the parabola.

$x=-2$

c) The maximum value is the y-value of the vertex.

Max: y=4

d) The vertex is the maximum point on the graph.

Vertex: (-2,4).

QUESTION 2

a) The graph touches the x-axis at only one point.

From the graph, the zero is $x=-2$

b) The axis of symmetry is the vertical line that goes through the vertex of the parabola.

$x=-2$

c) The minimum value is the y-value of the vertex.

Min: y=0

d) The vertex is the minimum point on the graph.

Vertex: (-2,0).

QUESTION 3

a) The graph touches the x-axis at two points.

From the graph, the zeros are $x=-3,x=3$

b) The axis of symmetry is the vertical line that goes through the vertex of the parabola.

$x=0$

c) The minimum value is the y-value of the vertex.

Min: y=-9

d) The vertex is the minimum point on the graph.

Vertex: (0,-9).

QUESTION 4

a) The zeros of the function are the x-values at which the graph touches the x-axis.

From the graph, the zeros are;

$x=-3,x=-5$

b) The axis of symmetry is the vertical line that goes through the vertex of the parabola.

$x=-4$

c) The maximum value is the y-value of the vertex.

Max: y=1

d) The vertex is the maximum point on the graph.

Vertex: (-4,1).

QUESTION 5

a) The graph touches the x-axis at two points.

From the graph, the zeros are $x=3,x=7$

b) The axis of symmetry is the vertical line that goes through the vertex of the parabola.

$x=5$

c) The minimum value is the y-value of the vertex.

Min: y=-4

d) The vertex is the minimum point on the graph.

Vertex: (5,-4).

QUESTION 6

a) The graph does not touch the x-axis.

The function has no real zeros.

b) The axis of symmetry is the vertical line that goes through the vertex of the parabola.

$x=2$

c) The minimum value is the y-value of the vertex.

Min: y=5

d) The vertex is the minimum point on the graph.

Vertex: (2,5).

QUESTION 7

a) The graph touches the x-axis two points.

The function has zeros at x=1 and x=5

b) The axis of symmetry is the vertical line that goes through the vertex of the parabola.

$x=3$

c) The minimum value is the y-value of the vertex.

Min: y=-4

d) The vertex is the minimum point on the graph.

Vertex: (3,-4).

QUESTION 8

a) The zeros of the function are the x-values at which the graph touches the x-axis.

From the graph, the zeros are;

$x=0,x=-2$

b) The axis of symmetry is the vertical line that goes through the vertex of the parabola.

$x=-1$

c) The maximum value is the y-value of the vertex.

Max: y=1

d) The vertex is the maximum point on the graph.

Vertex: (-1,1).

QUESTION 9

a) The graph touches the x-axis at only one point.

From the graph, the zero is $x=5$

b) The axis of symmetry is the vertical line that goes through the vertex of the parabola.

$x=5$

c) The minimum value is the y-value of the vertex.

Min: y=0

d) The vertex is the minimum point on the graph.

Vertex: (5,0).

5 0

4 years ago