simplify
8x2 – 12x
4x2 – 12x + 9​

Answer:

d and b

Step-by-step explanation:

Answer:

2

Step-by-step explanation:

Answer:

Step-by-step explanation:

Given the expression

4/5 x - 1/10 = 3/10

We are to find the value of x

4/5 x = 3/10 + 1/10

4/5 x = 4/10

Cross multiply

4x * 10 = 5 * 4

40x = 20

x = 20/40

x = 1/2

The value of x is 1/2

Answer:

Its 1/2 :)

Step-by-step explanation:

Answer: 40

Step-by-step explanation:

5*2^3 = ?   // means comment btw, also I am on my iPad so * means times and ^ power like 2 to the 3rd power

5*2*2*2

(5*2)*(2*2)

10*4

Answer= 40

Answer:

brainliest plzzzzz

Step-by-step explanation:

2(x-2) - 3(x-4)

Simplify:

2(x-2)-3(x-4)

2x-4-3(x-4)

Distribute:

2x-4-3(x-4)

2x-4-3x+12

Add the numbers:

2x-4-3x+12

2x+8-3x

Combine like terms:

2x+8-3x

-x+8

Hence Solution = -x+8

Answer:

-2x² + 3x + 10

Step-by-step explanation:

-(2x² - 3x - 7) + 3

-2x² + 3x + 7 + 3

-2x² + 3x + 10

Answer:

The answer is x=12

Step-by-step explanation:

2*12= 24-4 = 20/5=4

the answer is x=12

Answer: 0.09 mg

Step-by-step explanation:

To find out the milligrams in the blood after 10 hours you just need to replace the 'h' in the equation to 10.

= 5e⁻⁰°⁴ˣ¹⁰

= 5e⁻⁴

= 0.09157819444

= 0.09 mg

Step-by-step explanation:

36b-40=6b+40b+10

36b-6b-40b=10+40

-10b=50

b=-50:10

b=-5

Answer:

(5x + 7)² = 25x² + 70x + 49 ⇒ C

Step-by-step explanation:

The steps of solving the square binomial: (ax + b)²

1. (ax + b)² = (ax + b)(ax + b)

2. (ax + b)(ax + b) = (ax × ax) + (ax × b) + (b × ax) + (b × b) = a²x² + abx + abx + b²

3. Add the like terms ⇒ a²x² + (abx + abx) + b² = a²x² + 2abx + b²

Then (ax + b)² = a²x² + 2abx + b²

Let us use the same steps to solve the question

∵ (5x + 7)² = (5x + 7)(5x + 7)

∴ (5x + 7)(5x + 7) = (5x)(5x) + (5x)(7) + (7)(5x) + (7)(7)

∴ (5x + 7)(5x + 7) = 25x² + 35x + 35x + 49

→ Add the like terms

∵ 25x² + 35x + 35x + 49 = 25x² + (35x + 35x) + 49 = 25x² + 70x + 49

∴ (5x + 7)(5x + 7) = 25x² + 70x + 49

→ Then equate (5x + 7)² by the right side above

∴ (5x + 7)² = 25x² + 70x + 49

Answer:

(x - 3)² + (y + 1)² = 65

Step-by-step explanation:

The equation of a circle in standard form is

(x - h)² + (y - k)² = r²

where (h, k) are the coordinates of the centre and r is the radius

The centre C is at the midpoint of the endpoints of the diameter.

Using the midpoint formula to find C

C = ( [tex]\frac{7-1}{2}[/tex], [tex]\frac{6-8}{2}[/tex] ) = ( [tex]\frac{6}{2}[/tex], [tex]\frac{-2}{2}[/tex] ) = (3, - 1 )

The radius is the distance from the centre to either of the endpoints of the diameter.

Using the distance formula to find r

with C (3, - 1 ) and (7, 6 ) , then

r = [tex]\sqrt{(7-3)^2+(6+1)^2}[/tex]

  = [tex]\sqrt{4^2+7^2}[/tex]

  = [tex]\sqrt{16+49}[/tex]

  = [tex]\sqrt{65}[/tex]

Then equation of circle is

(x - 3)² + (y - (- 1) )² = ([tex]\sqrt{65}[/tex] )², that is

(x - 3)² + (y + 1)² = 65 ← equation of circle

Answer:

The graph at the bottom

Step-by-step explanation:

All the numbers are gonna come out positive, because of the absolute value bars.

Answer:

i think its the last one i got that answer right

Step-by-step explanation:

Answer:

7r

Step-by-step explanation:

because 7r is 7(r)

Answer:

x < -10/3 OR x > 20/3

Step-by-step explanation:

|5 - 3x| - 3 > 12

|5 - 3x| > 15

since it's absolute value, you have 2 scenarios to solve:

1) 5 - 3x > 15

-3x > 10

x < -10/3  (when dividing or multiplying by a negative, switch the symbol)

2) -(5 - 3x) > 15

-5 + 3x > 15

3x > 20

x > 20/3

Step-by-step explanation:

1. ½(2r + 4) - ¼(16 - 8r)=3r-2

2. (8x - 3) - (2x + 6)=6x-9

3. (2 - 7y) - 3(y - 9)=-10y+29

4. 2(3x - 4) - (2x - 5)=4x-3

Answer:

4:5

Step-by-step explanation:

8:10 = 4  : 5

Answer:

4:5

Step-by-step explanation:

Answer:

Therefore, x = 1 and y = -1 .

Step-by-step explanation:

The steps are :

[tex]4x - 5y = 9 - - - (1)[/tex]

[tex] - 6x + 5y = - 11 - - - (2)[/tex]

[tex](1) + (2)[/tex]

[tex]4x + ( - 6x) = 9 + ( - 11)[/tex]

[tex] - 2x = - 2[/tex]

[tex]x = 1[/tex]

[tex]sub \: x = 1 \: into \: (2)[/tex]

[tex](2)⇒[/tex]

[tex] - 6(1) + 5y = - 11[/tex]

[tex] - 6 + 5y = - 11[/tex]

[tex]5y = - 11 + 6[/tex]

[tex]5y = -5[/tex]

[tex]y = -1 [/tex]

Answer:

I hope it work

Step-by-step explanation:

adding both the equations

4x-5y=9

-6x+5y=-11

-2x+0y=-2

-2x=-2

Now divide both sides by -2

-2/-2 x= -2/-2

Answer:

p = 7/2 or 3.5

Step-by-step explanation:

-4p + 9 = -5

-4p = -14 (subtracted 9 from both sides)

p = -14/-4 = 7/2

Answer:

p=3.5

Step-by-step explanation:

-4p+9=-5

-9

-4p=-14

p=3.5

Answer:

105

Step-by-step explanation:

0 (104) is equal to 0, so let's cross that out. 103 times 102 is definitely not equal to 105. The third one is 105. The fourth one is not 105. The last one is not 105 either.

Answer:

A) 3

Step-by-step explanation:

divide 77 by 11

you get 7

divide 21 by 7 to find x

x=3

Answer:

πd X 27.5

π X 29.5 X 27.5= 2548.61704

2548.62cm

Answer:

P = -4

Step-by-step explanation:

Assuming that x = 20 and y = 24, you have to plug in these numbers for x and y to get to this equation P = 20 - 24.  You should get -4 when you subtract 24 from 20 giving you a negative answer.

Answer:x=3

Step-by-step explanation:

Equation:

5x+2=17

5x=15

x=3

Answer

the circles are 3 numbers each for it to be even

Answer:

24 and 56

Step-by-step explanation:

8*3=24

7*8=56

Answer:

[tex]\frac{7}{4} u^{-4}[/tex]

Step-by-step explanation:

49/28 is 7/4

Applying the inverse law

u^2-6

u^-4

therefore [tex]\frac{7}{4} u^{-4}[/tex]

Answer:y=1/5x+5

Step-by-step explanation:

m=slope so plug in the slope you already have which is 1/5

b= y intercept so plug in your y intercept which is 5