3 years ago

In order to solve the following system of equations we add :

Mathematics

1 answer:

vlabodo [156]3 years ago

5 0

False, you want to subtract in order to get rid of the 2x in both equations

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What type of triangle can a right triangle be?

Dimas [21]

Answer:

acute

Step-by-step explanation:

Please mark brainliest and have a great day!

6 0

3 years ago

How do you know when ratios are equivalent and when they are not equivalent

White raven [17]

Ratios are equivalent when that can be reduced or multiplied to be the same number.
Ex) 1:4 is the same as 2:8 or 4:16
10:20 is the same as 8:16 or 1:2

They are not equivalent if you can’t do this

7 0

3 years ago

Angelo says that if you know one unit rate in a proportional relationship, the other unit rate is always the multiplicative inve

Alexeev081 [22]

If you go 10 miles per hour 
then that is indeed 1/10 hour per mile 

In general yes 
do not divide by zero though :

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4 years ago

Suppose that the exam scores for students in a large university course are normally distributed with an unknown mean and standar

HACTEHA [7]

Answer:

Critical value t-score=2.701.

Step-by-step explanation:

When we calculate a confidence interval with an unknown population standard deviation, we estimate it from the sample standard deviation and use the t-score instead of the z-score.

The critical value for t depends on the level of confidence and the degrees of freedom.

If the sample size is 42, the degrees of freedom are:

$df=n-1=42-1=41$