1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Anna007 [38]
3 years ago
12

Last question , thanks!!! so much

Mathematics
2 answers:
Serggg [28]3 years ago
6 0

Answer:

A. (1, 3)

Step-by-step explanation:

Each equation has a graph which is a line. Every point on the line is a solution to that equation. The solution to the system of equations is the point that is on both lines. The solution of the system of equations is the point that is a solution to both equations. It is the point of intersection of the two lines.

Read the coordinates of the point of intersection of the blue line and the red line.

Start at (0, 0). Go right 1 unit. Now you have x = 1. From there go up 3 units. Now you have y = 3. The point that corresponds to x = 1 and y = 3 is the point (1, 3).

Answer: A. (1, 3)

bezimeni [28]3 years ago
3 0

Answer: (1,3)

Step-by-step explanation:

Find the place where the two lines cross. That’s your answer! It’s (1,3).

You might be interested in
P divided 31 is less than or equal to 30
Harlamova29_29 [7]
P divided by 31 is less than to 30 because what p is will be less because when you divide you make something smaller

6 0
3 years ago
Read 2 more answers
CAN SOMEONE PLEASE HELP ME????
Pavel [41]

Answer:

The range is {-3, -2, 0, 2}

3 0
3 years ago
1. A researcher tested the diastolic blood pressure of 15 marathon runners and 15 non-runners. The mean for the runners was 75.9
dlinn [17]

Answer:

Calculated value t =0.0109 < t = 1.701 at 28 degrees of freedom at 0.05 level of significance.

running a good way to lower a person's blood pressure

Step-by-step explanation:

<u>Step :1</u>

A researcher tested the diastolic blood pressure of 15 marathon runners and 15 non-runners

The first sample size is n₁ =15

The second sample size is n₂ =15

Given data the mean for the runners was 75.9 mm Hg with an SS of 1,500

The mean of the first sample x₁⁻ = 75.9 mm

The mean of the second sample x₂⁻   = 80.3mm

The standard deviation of the first sample (S₁) = 1,500

The standard deviation of the second sample (S₂) = 8

<u>Step 2</u>:-

<u>Null hypothesis </u>:- H₀ :  x₁⁻ = x₂⁻

<u>Alternative hypothesis</u>:- H₁ :  x₁⁻ ≠ x₂⁻

<u>level of significance</u> :- α= 0.05

The test statistic t = \frac{x_{1}^- -x_{2}^-  }{S\sqrt{\frac{1}{n_{1} } +\frac{1}{n_{2} } } }

where S^{2} =\frac{n_{1}S_{1} ^2+n_{2}S_{2} ^2 }{n_{1}+n_{2}-2}

n₁ =15 ,n₂ =15 x₁⁻ = 75.9 mm ,x₂⁻   = 80.3mm and (S₁) = 1,500 and (S₂) = 8

substitute all values in above equation, we get

S^{2} =\frac{15X(1500) ^2+15X(8) ^2 }{15+15-2}

s^2 = 1,205,391.42

Standard deviation = √1,205,391.42 = 1097.903

<u>Step 3</u>:-

The test statistic

                 t = \frac{x_{1}^- -x_{2}^-  }{S\sqrt{\frac{1}{n_{1} } +\frac{1}{n_{2} } } }

x₁⁻ = 75.9 mm ,x₂⁻   = 80.3mm, n₁ =15 ,n₂ =15 and S = 1097.903

The test statistic value t = -0.01097

modulus t = 0.0109

Calculated value t =0.0109

The degrees of freedom γ=n₁+n₂ -2 = 15+15 -2 =28

From t- distribution table

From tabulated value t = 1.701 at 28 degrees of freedom at 0.05 level of significance.

Calculated value t =0.0109 < t = 1.701 at 28 degrees of freedom at 0.05 level of significance.

Therefore we accepted null hypothesis.

running a good way to lower a person's blood pressure

   

3 0
3 years ago
Point M is the midpoint of AB. If the coordinates of M are (2,8) and the coordinates of A are (10,12),what are the coordinates o
ElenaW [278]

~~~~~~~~~~~~\textit{middle point of 2 points } \\\\ A(\stackrel{x_1}{10}~,~\stackrel{y_1}{12})\qquad B(\stackrel{x_2}{x}~,~\stackrel{y_2}{y}) \qquad \left(\cfrac{ x_2 + x_1}{2}~~~ ,~~~ \cfrac{ y_2 + y_1}{2} \right) \\\\\\ \left(\cfrac{ x + 10}{2}~~~ ,~~~ \cfrac{ y + 12}{2} \right)~~=~~\stackrel{M}{(2,8)}\implies \begin{cases} \cfrac{x+10}{2}=2\\[1em] x+10=4\\ \boxed{x=-6}\\[-0.5em] \hrulefill\\ \cfrac{y+12}{2}=8\\[1em] y+12=16\\ \boxed{y=4} \end{cases}

4 0
2 years ago
Micah drew a map of his neighborhood. The actual distance from his house to the school is 5.75 miles. What is the actual distanc
Elan Coil [88]

Answer:

2.875 mi  

Step-by-step explanation:

A scale factor (SF) is the ratio of two corresponding lengths in similar figures.

SF = actual distance/map distance = 5.75 mi/2 in

or 1 in = 2.875 mi

On the map, the distance from the library to the park is 1 in, so the actual distance is 2.875 mi.

3 0
2 years ago
Read 2 more answers
Other questions:
  • Is 9/11 rounded to 0,1/2 or 1
    10·2 answers
  • Some group insurance plans cover ordinary doctor visits and dental work. true or false
    14·2 answers
  • How to write the quotient of a number plus 6 and 3 as a variable expression
    12·1 answer
  • The perimeter of a rectangle is 48 cm. The length is 6cm less than twice the width. Which system would model this situation and
    15·1 answer
  • Susan needs to buy apples and oranges to make fruit salad. She needs 15 fruits in all. Apples cost $3 per piece, and oranges cos
    6·2 answers
  • The value of a professional basketball player's autograph rose 20% in the last year. It is now worth $288.00. What was it worth
    8·1 answer
  • Which figures are polygons? select all that are
    14·1 answer
  • Thank you so much!!!
    8·1 answer
  • The table shows ordered pairs of the function y=8-2x. What is the value of y when x=8
    12·1 answer
  • What is the correct answer?
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!