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aniked [119]
3 years ago
15

Is a biased sample valid

Mathematics
1 answer:
murzikaleks [220]3 years ago
5 0
No a biased sample is not valid
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7x+9y=-41 and x+3y=1. Solve system of equations
galben [10]

9514 1404 393

Answer:

  (x, y) = (-11, 4)

Step-by-step explanation:

You can subtract 3 times the second equation from the first to eliminate y.

  (7x +9y) -3(x +3y) = (-41) -3(1)

  4x = -44

  x = -11

Substituting into the second equation gives ...

  -11 +3y = 1

  3y = 12

  y = 4

The solution is (x, y) = (-11, 4).

7 0
3 years ago
Select all of the angles that have the same measure as angle 2. assume the lines are parallel
Phoenix [80]
4, 5, and 7 are the answer
6 0
3 years ago
Read 2 more answers
Nathan hit 19 homeruns. He scored 3 fewer homeruns than twice the number of homeruns hit by jason. Write and solve an equation t
Vinvika [58]

Jason hit 11 homeruns.

Step-by-step explanation:

Homeruns hit by Nathan = 19

Let,

Homeruns hit by Nathan = x

Homerun hit by Jason = y

According to given statement;

x = 2y - 3   Eqn 1

We know that Nathan hit 19 homeruns, therefore, putting x=19 in Eqn 1

19=2y-3\\19+3=2y\\22=2y\\2y=22

Dividing both sides by 2;

\frac{2y}{2}=\frac{22}{2}\\y=11

Jason hit 11 homeruns.

Keywords: linear equations, addition

Learn more about linear equations at:

  • brainly.com/question/3375830
  • brainly.com/question/3398261

#LearnwithBrainly

7 0
2 years ago
Convert 1400 pounds into kilograms. Round your answer to the nearest whole
jasenka [17]

Answer:

635 (635.0293 not rounded)

8 0
2 years ago
What ratio would you use to determine how many seconds are in a minute?
meriva
60:1

 I think anyway, I just know that there are 60 seconds in one minute so sixty to one, not completely sure tho
6 0
3 years ago
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