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kifflom [539]
3 years ago
7

Solve the system of linear equations by substitution.

Mathematics
2 answers:
natali 33 [55]3 years ago
8 0
Plug in -x+9 in for y and you should get (2,7)
Goryan [66]3 years ago
6 0

Answer:

hey! This was the only part of mathematics I ever enjoyed! So consider this both of our lucky days: Answer is : (2,7)

Step-by-step explanation:

basically plug in Y to the first equation as sox + 4(-x + 9) = 30

x - 4x + 36 = 30- 3x = - 6

x = 2

then plug that in to Y!

Y = -(2) + 9

so Y = 7

and our answer is : (2,7)

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Question 1
erastova [34]

Based on the above scenario, the sales director conducted  an <u>experiment</u>.

  • Because a treatment  <u>was </u>applied to the sales representatives.

  • The the best statistical study for this situation because the sales director is trying to establish <u>correlation</u>.

<h3>What is an experiment?</h3>

An experiment is known to be a method that is et up with the aim to test a given hypothesis as a component of a scientific method.

In an experiment, there are the two key variables which are the independent and dependent variables. The independent variable is known to be a controlled or it is tested against the dependent variable.

See full question

Part A.

The sales director conducted a.) an experiment b.) a survey c.)an observational study because a treatment a.) was not b.)was applied to the sales representatives.

This is the best statistical study for this situation because the sales director is trying to establish a.) causality b.) correlation.

Learn more about experiment from

brainly.com/question/17274244

5 0
2 years ago
PLZ HELP!!!!!!35. ABCD is an isosceles trapezoid with A(0,-1), B(-2,3) and C(6,-1). Find the coordinates of C.
sashaice [31]

Answer:

wouldnt it be (6,-1)...

Step-by-step explanation:

because those are the cords your said c was at

6 0
3 years ago
The circle has a diameter of 16 inches. What is the area of the circle, rounded to the nearest square inch?
Ratling [72]

<u>Statement</u><u>:</u>

The circle has a diameter of 16 inches.

<u>To </u><u>find </u><u>out:</u>

The area of the circle.

<u>Solution</u><u>:</u>

  • Diameter of the circle = 16 inches.

  • Radius of the circle
  • = Diameter ÷ 2
  • = 16 inches ÷ 2
  • = 8 inches

  • π = 3.14

  • We know, area of a circle = πr² where r is the radius.

  • Therefore, the area of the circle
  • = 3.14 × (8)² square inches
  • = 3.14 × 64 square inches
  • = 200.96 square inches
  • = 201 square inches [rounded to the nearest square inch]

<u>Answer</u><u>:</u>

C) 201 square inches

Hope you could understand.

If you have any query, feel free to ask.

4 0
3 years ago
Read 2 more answers
The function g(x) = 8(4)x is reflected across the x - axis to creat f(x). What is the equation for f(x)
Nikolay [14]

The function g(x) = 8(4)x is reflected across the x - axis to creat f(x). What is the equation for f(x)

4 0
3 years ago
There is a 50% chance a coin lands on heads and a 50% chance the coin lands on tails what is the probability that the coin lands
Olegator [25]

Since the probability of the coin landing leads is 1/2, simply cube 1/2 to arrive at your answer: 1/8.


You cube 1/2 because you must land heads three times in a row and each flip is independent from other flips.


4 0
3 years ago
Read 2 more answers
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