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Semmy [17]
3 years ago
6

Simplify (5x2 + 3x + 4) + (5x2 + 5x − 1).

Mathematics
1 answer:
Vlad1618 [11]3 years ago
3 0

Answer:

<em>=10x^2+8x+3</em>

Step-by-step explanation:

Lets simplify step by step.

=5x^2+3x+4+5x^2+5x+-1

Combine like Terms.

=5x^2+3x+4=5x^2+5x=-1

=(5x^2+5x^2)+(3x+5x)+(4+-1)

=10x^2+8x+3

<u><em>=10x^2+8x=3</em></u>

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What is the total number of possible 4-letter arrangements of the letters m-a-t-h if each letter is used exactly once in each ar
MariettaO [177]

9514 1404 393

Answer:

  24

Step-by-step explanation:

The number of permutations of 4 items is 4! = 24.

  math, maht, mtah, mtha, mhat, mhta,

  amth, amht, atmh, athm, ahmt, ahtm,

  tmah, tmha, tamh, tahm, thma, tham,

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7 0
3 years ago
A circle is centered at the point (-7, -1) and passes through the point (8, 7). The radius of the circle is units. The point (-1
padilas [110]

 

hello :<span>
<span>an equation of the circle Center at the A(a,b) and ridus : r is :
(x-a)² +(y-b)² = r²
in this exercice : a = -7  and b = -1 (Center at: A(-7,-1) )
r = AP.... P(8,7)
r² = (AP)²
r² = (8+7)² +(7+1)² =225+64=289 ...... so : r = 17
an equation of the circle that satisfies the stated conditions.
Center at  </span></span>A(-7,-1), passing through P(8, 7) is :  

(x+7)² +(y+1)² = 289

The point (-15,y ) <span>lies on this circle : (-15+7)² +(y+1)² = 289....(subsct : x= -15)
(y+1)² = 225
(y+1)² = 15²
y+1 = 15   or y+1 = -15
y = 14  or y = -16
you have two  points : (-15,14)  , (-15, -16)</span>
8 0
3 years ago
Simplify the expression:<br> 3x4-8d+1
svetlana [45]

Answer:

-8d+13

Step-by-step explanation:

Add and Multiply all of the numbers without variables:

3x4+1

Use PEMDAS to solve (Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction):

3x4=12

12+1=13

Now you have your answer:

-8d+13

5 0
2 years ago
Read 2 more answers
Someone please help, it will be so appreciated!
FrozenT [24]

Hello,

Question:

Keisha solved the following equation:

4x − 2x + 8 = 6(x + 4)

Which step has an incorrect justification? (Make sure to type only the number of the step into the blank: 1, 2, 3, 4 or 5)

Correct Solution:

x − 2x + 8 = 6(x + 4)

4x + −2x + 8 = (6) (x) + (6) (4) (Distribute)

4x + −2x + 8 = 6x + 24

(4x + −2x) + (8) = 6x + 24 (Combine Like Terms)

2x + 8 = 6x + 24

2x + 8 = 6x + 24

Subtract 6x from both sides.

2x + 8 − 6x = 6x + 24 − 6x

−4x + 8 = 24

Subtract 8 from both sides.

−4x + 8 − 8 = 24 − 8

−4x = 16

-4 x -4 = 16

x = -4

Answer:

Where keisha went wrong was forgeting to subtract 6x to both sides.

Incorrrect step is #3


7 0
3 years ago
Read 2 more answers
The number of personal injury traffic accidents last week on interstate 65 in indiana.
marta [7]
I don’t know, use google my g
6 0
3 years ago
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