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Elza [17]
3 years ago
9

HELP ANSWER AND EXPLAIN I’LL MARK BRAINLIEST

Mathematics
1 answer:
lys-0071 [83]3 years ago
6 0

Answer:

x = 2.2, y = 5.3

Step-by-step explanation:

This question is asking us to solve a system (find x and y). Because they give us that y = 1.5x + 2, then we can use this to substitute into the second equation.

9x + 4y = 41

9x + 4(1.5x + 2) = 41

Simplify.

9x + 6x + 8 = 41

15x + 8 = 41

Subtract 8 from both sides.

15x = 33

Divide both sides by 15.

x = 11/5 = 2.2

To find y, substitute x = 2.2

y = 1.5x + 2

y = 1.5 * 2.2 + 2

y = 3.3 + 2

y = 5.3

Now, we can double check to see if these two answers are right. Plug these numbers into the other equation (because to find y, we already used the first equation, so there is no need to check it, as it would just give us 5.3 = 5.3)

9x + 4y = 41

9 * 2.2 + 4 * 5.3 = 41

19.8 + 21.2 = 41

41 = 41

Thus, the answer is correct.

I hope this helps! Feel free to ask any questions!

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Add and write in standard form: (-3x^4 + 6x^3 - 43) + (8x^5 - x^2 + 12x + 10)
Maslowich

Answer:

A.) 8x^5 - 3x^4 + 6x^3 - x^2 + 12x - 33

3 0
3 years ago
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Determine whether each number is prime, composite, or neither.
givi [52]
Alright lets start by defining both prime and composite.

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And natural number, other than one, that is not prime, is composite.

So lets start on #1: 8. We should know right off the bat that this is an even number and therefore can be divided by 2 (8/2=4). Since 8 is not one, we know that it is a composite number.

On #2 the number is 13. Now try some random numbers (2,3...) and you will find that nothing will give you a whole number (other than one). This means this number is prime.

#3 is the number 24 which is also even and can be divided by two, therefore is it composite.

33 is the number on #4. Now this one you should look at and realize that it can be divided by 11. Any two numbers that are the same (11, 22, 33, 44, 55...) can be divided by 11. This number is composite.

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4 0
4 years ago
Question 4
Archy [21]

Answer:

-36

Step-by-step explanation:

replace x with -5 and solve for the parenthesis and then take that number which would be -16 and multiply it by 9 which then would give you -144.  So then you would take -144 and divide it by 4 and your answer would be -36.

5 0
3 years ago
Can someone tell me if i did this right? im also not sure which one is the scale factor.
PIT_PIT [208]
If you are moving the center of circle 2 to the the center of circle 1, then the translation rule is (x,y) ---> (x+4, y+10). 
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Also, y = -2 turns into y = 8. We add 10

The scale factor to turn the radius r = 4 into r = 8 is 2. Basically we double the radius. We can divide the two radii to see 8/4 = 2

----------------------------------

Summary:
To go from circle 2 to circle 1, we apply these two transformations
translation: (x,y) ---> (x+4, y+10)
dilation: scale factor 2

note: 
if you want to go backwards, go from circle 1 to circle 2, then undo the transformations above
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