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MariettaO [177]
4 years ago
7

Simplify the expression: 3x2(x2 - 4x - 2) + (5x3 + 7x2 + 2x + 11) Show and explain your steps.

Mathematics
1 answer:
KengaRu [80]4 years ago
7 0
Are they suppose to be squared ?

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Help please help me its a hard one
DanielleElmas [232]

Answer:

The sum of a and b is 12.

Step-by-step explanation:

Try drawing this figure. ABCD would actually be a triangle, rather than the common quadrilateral you would expect -  considering there are 4 points plotted. Therefore, we would have to find the distance between respective points ( 0, 1 ) and ( 2, 5 ) / ( 2, 5 ) and ( 7, 0 ) / ( 0, 1 ) and ( 7, 0 ). Let's apply the distance formula and calculate the distance between each point, therefore determining the perimeter.

Distance between points ( 0, 1 ) and ( 2, 5 )

= \sqrt{(2-0)^2+(5-1)^2}

= \sqrt{(2)^2+(4)^2}

= \sqrt{4+16}

= \sqrt{20} = 2\sqrt{5}

Distance between points ( 2, 5 ) and ( 7, 0 )

= \sqrt{(7-2)^2+(0-5)^2}

= \sqrt{5^2+(-5)^2}

= \sqrt{25+25}

= \sqrt{50} = 5\sqrt{2}

And you can calculate the distance between points ( 0, 1 ) and ( 7, 0 ) to be exactly 5\sqrt{2} as well. Therefore, you can say that the perimeter of this triangle is 2(5\sqrt{2}) + 2\sqrt{5} = 10\sqrt{2} + 2\sqrt{5}. Note that this is similar to the form we are given. Thus, a = 10, and b = 2 - making it's sum 10 + 2 = 12.

8 0
4 years ago
PLEASE SOLVE
kherson [118]

Answer:

14/5

Step-by-step explanation:

So first i manipulated a/b= 2/5. i multiplied both sides by 5 making it 5a/b=2. Then i multiplied both sides by b making it 5a=2b. Then i substituted 2b into 5a+3b=35. Making it 2b+3b=35. then i simplified it making it 5b=35. Then i solved for b making it b=7. Then i substituted b into 5a+3b=35. So that it looked like this 5a+3*7=35. then it became 5a+21=35. Then you subtract 21 making it 5a=14. You then divide by 5 making it a=14/5

3 0
3 years ago
Read 2 more answers
13x−2=<br>  <br>  <br> −<br> 10<br> x<br> −<br> 2<br> −10x−2
Misha Larkins [42]

Answer:

x=0

Step-by-step explanation:

13x-2 = 10x-2

Subtract 10x from each side

13x-10x-2 = 10x-2 -10x

3x-2 = -2

Add 2 for each side

3x-2+2 = -2+2

3x= 0

divide by 3

3x/3 = 0/3

x =0

3 0
4 years ago
HELP!! BRAINLIEST AND 10 POINTS !!!! THANK YOU SO MUCH
Anna71 [15]

Answer:

B and C

Step-by-step explanation:

BRAINLIEST PLEASE

4 0
3 years ago
f(n)=93+4(n-1)f(n)=93+4(n−1)f, left parenthesis, n, right parenthesis, equals, 93, plus, 4, left parenthesis, n, minus, 1, right
polet [3.4K]

Answer: f(n) = 4n + 97 (or 97 + 4n)

Step-by-step explanation:

Distribute 4 and (n-1)

f(n) = 93 + 4n - 4

Add 93 and 4

f(n) = 97 + 4n

4 0
3 years ago
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