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3 years ago

Can someone please let me know if these are the correct answers

Mathematics

1 answer:

Lostsunrise [7]3 years ago

8 0

1. x >= 4, because 4 is dotted, and that means that 4 is included

2. x =/ 4, the third answer is correct, because all numbers except 4 are included

3. the first number line is the correct answer, because -3 is not included

4. the second number line is the correct answer, because -1 is included

5. the second number line is the correct answer, because 6 is not included

6. the first number line is the correct answer, because 0 is included

7. the second number line is the correct answer, because all numbers except -4 are included

8. the third number line is the correct answer, because -1,5 is included

When a number is included in an interval, it should have full dot on the number line, so that's how you know.

Hope this helps!

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A 40% antifreeze solution is to be mixed with a 70% antifreeze solution to get 240 liters of a 64% solution. How many liters of

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We have 40% antifreeze and 70% antifreeze and we need to make 240 liters of 64% antifreeze.

We set up 2 equations where "f" is the 40 % and "s" is the 70%

A) f + s = 240

B) .40f + .70s = (.64 * 240) (or 153.6)

To solve both equations we multiply A) by -.40

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48 liters of 40% = 19.20 liters of antifreeze

192 liters of 70% = 134.40 liters of antifreeze

That equals 153.60 liters of antifreeze in a TOTAL liquid amount of 240 liters.

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153.60 / 240 = 64% antifreeze.

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3 years ago

A medical devices company wants to know the number of hours its MRI machines are used per day. A previous study found a standard

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The company has to study 199 machines.

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It is given that;

Margin of error E = 0.7

Confidence interval 98% = 1-0.98 = 0.02

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Z alpha/2 = 1.645 at alpha = 0.1

Inputting these values into n we have that

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To know more about standard deviation visit: brainly.com/question/475676

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1 year ago

What is x-2y=3 in slope intercept form

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3 years ago

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HELP ASAP PLEASE!!

Mama L [17]

Answer:

Step-by-step explanation:

According to the table, function g(x) reaches the max height of 33, approx.

The equation of motion is f(x) = -16x^2 + 42x + 12. We need to determine the maximum of this function. To do this, find the x-coordinate of the vertex, which is x = -b/(2a), or x = -42/(2*-16), or 1.31 sec.

Evaluating f(x) = -16x^2 + 42x + 12 at x = 1.31 sec, we get f(1.31) = 39.6.

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3 years ago