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3 years ago

Determine if the statement is always ,sometimes, or never true.

Mathematics

1 answer:

AnnyKZ [126]3 years ago

5 0

The answer is always true

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An employer uses the linear regression equation mc024-1.jpg to predict the weekly salary, y, of an employee who sells x dollars

jolli1 [7]

Answer:

Alex earned about $60 more than Joaquin did.

Step-by-step explanation:

5 0

3 years ago

The swimming team has competed in 45 races this season. They have won 30 races so far. How many races will the team need to win

tatuchka [14]

Answer:

15 races

Step-by-step explanation:

The team has competed in 45 and has won 30. So the success rate is:

Success rate is:

$Sccess\ rate=r= \frac{30}{45}*100\\ =66.7\ percent$

We have to find the number of races the team needs to win for 75% success rate

Which means that

$r = \frac{30+x}{45+x} = 0.75\\$

We have to solve the equation for x

$\frac{30+x}{45+x}=0.75\\ 30+x = 0.75(45+x)\\30+x=33.75+0.75x\\x-0.75x=33.75-30\\0.25x=3.75\\x=\frac{3.75}{0.25}\\ x=15$

The team needs to win 15 races to get 75% success rate ..

4 0

3 years ago

A triangle has side lengths of 12, 15, and x. The value of x must ne greater than what?

Bezzdna [24]

Answer:

3 < x < 27

Step-by-step explanation:

We can't tell what "must ne greater" means, so we'll tell you the limits on the side length and you can choose the one that is relevant.

The third side of a triangle must have a length that lies between the difference and sum of the two lengths you know.

15 -12 = 3

15 +12 = 27

The value of x must be between 3 and 27:

3 < x < 27

If you allow the triangle to have zero area, then x can be 3 or 27. Many authors claim such a "triangle" is not allowed, so don't allow those cases.

7 0

3 years ago

What is the length of AB when A is (-7,-6) and B is (1,0)

NemiM [27]

Answer:

The answer is

<h2>10 units</h2>

Step-by-step explanation:

The distance between two points can be found by using the formula

$d = \sqrt{( {x1 - x2})^{2} + ({y1 - y2})^{2} } \\$

where

(x1 , y1) and (x2 , y2) are the points

From the question the points are

A (-7,-6) and B (1,0)

The distance between them is

$|AB| = \sqrt{( { - 7 - 1})^{2} + ({ - 6 - 0})^{2} } \\ = \sqrt{ ({ - 8})^{2} + ({ - 6})^{2} } \\ = \sqrt{64 + 36} \\ = \sqrt{100} \: \: \: \: \: \: \: \:$

We have the final answer as

<h3>10 units</h3>

Hope this helps you

5 0

3 years ago

10. Evaluate x(-y + z) for x = − 1, y = 2, and z = 5.<br><br> -3<br><br> 3<br><br> 7<br><br> -7

Law Incorporation [45]

Answer:

-3

Step-by-step explanation:

x(-y+z) replace with the values given above

-1(-2+5)

7 0

2 years ago

Read 2 more answers