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ale4655 [162]
3 years ago
7

Pls help i don’t understand

Mathematics
1 answer:
kirill [66]3 years ago
8 0

Answer:

r + 7 is a factor.

Step-by-step explanation:

You have to divide 3r^{4} +23r^{3} +15r^{2} +r - 42 by r + 7.  If the remainder is 0, then r + 7 is a factor of  3r^{4} +23r^{3} +15r^{2} +r - 42.

I did that and the remainder was 0.

So, yes, r + 7 is a factor.  

You will need to learn how to do that division in order to solve this problem.  OK?  

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PLEASE HELP QUICKLY!!!!
joja [24]

Answer:

A= -4

B= 4

C= 1/4

D= -1/4

Step-by-step explanation:

I see u counted which is good. remember it's rise over run so for a u got up down 4 over 1. that's why the slope would be -4. You figure out the other ones the same way.

3 0
4 years ago
Richard rolls a fair dice 72 times.
Strike441 [17]

Answer:

24

Step-by-step explanation:

there are six sides of a dice, numbered one through six. 5 and 6 are greater than four, so there is a 2/6 chance that you will roll a number greater than 4, or 1/3. multiply 72 times 1/3 and that equals 24. 24 out of the 72 (24/72 = 1/3)times is how much you could expect to get a number greater than 4.

4 0
2 years ago
Complete the sentence.
igomit [66]

Answer: 3|x| = 3x when x \geq 0 and 3|x| = -3x when x < 0

Step-by-step explanation: Absolute value basically refers to the distance of a point from the origin (zero), regardless of the direction. The absolute value of a number is represented by two vertical lines enclosing the number. For example, |6| = 6, or in this case, 3|x| = 3x. Here, the value is replaced by the term "x". "x" is used as a term for an unknown value/variable. so basically, we're solving for x kinda. Multiplying "x" (the unknown variable) by 3 gives us = 3x. We know from the sign \geq that x <u>can't be below zero</u>, only <u>above or equal to</u>. So, 3lxl = 3x when x is above or equal to the origin (zero). We know from the second problem that x <u>can't be above zero </u>because of the sign <, only <u>below zero</u>. Because we can only go below zero, that positive 3 turns negative. Multiplying x by -3 gives us = -3x. So, 3|x| = -3x when x is blow the origin (zero).

Note: <u>the absolute value of a number is always positive</u>, but in this scenario this rule doesn't apply because "x" is not a number, only a unknown value.

Sorry in advance if my explanation still doesn't make sense. Math isn't my thing really.

3 0
3 years ago
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masya89 [10]

Answer:

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Step-by-step explanation:

3 0
4 years ago
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horrorfan [7]

Answer:

yes...

Step-by-step explanation:

3 0
3 years ago
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