Given: ∠1 and ∠2 are complementary angles.
Prove: ∠3 and ∠4 are complementary angles.

Answer:

x = 5/2

Step-by-step explanation:

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

Re-writing the eqn, we get,

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

2x + 3 = 4x - 2

3 + 2 = 4x - 2x

5 = 2x

∴ x = 5/2

Answer:

14+28i

Step-by-step explanation:

Answer:

67.5

Step-by-step explanation:

Okay, 4-15

15/4 is 3.75

1-3.75

I think this is right sorry if not

Answer:

1hr 7½mins to complete 18 invitations *I think.

Answer: x=8 or x=-2

Step-by-step explanation:

It would be the first option on the test.

You should subtract 25 on both sides to get this equation x^2-6x-16 in order to factor.  There are three multiplication equations to get to the number 16 which is 1*16, 2*8, and 4*4.  1*16 wouldn't work since you would get either 17, 15 or -15, 4*4 would also not work since you would get +/-8 or 0, which would finalize our two numbers 2 and 8.

Since the c value is negative you would need to get one of your numbers negative which would be -8 since -8 + 2 = -6 which would factor out to (x-8)(x+2).  Subtract -8 and 2 for each x values to get 8 and -2.

x=-2 or x=8 are the  values of x in the equation x²-6x + 9= 25.

A quadratic equation is a second-order polynomial equation in a single variable x , ax2+bx+c=0. with a ≠ 0 .

The given equation is x²-6x + 9= 25

We need to find the values of x.

x²-6x + 9= 25

Let us convert this equation to a quadratic equation.

x²-6x + 9 - 25 = 0

x²-6x -16=0

Now let us factorize the equation

x²-8x+2x -16=0

Take common terms

x(x-8)+2(x-8)=0

(x+2)(x-8)=0

x=-2 or x=8

Hence, x=-2 or x=8 are the  values of x in the equation x²-6x + 9= 25.

To learn more on Quadratic equation click:

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Answer:

ok

Step-by-step explanation:

Answer:

???

Step-by-step explanation:

ummmm...

Answer:

Rosaria purchased 50 bracelets and 70 necklaces

Step-by-step explanation:

Let the number of bracelets be b and the number of necklaces be n

b + n = 120 •••••(i)

Secondly;

10b + 11n = 1270 ••••(ii)

Total cost of b bracelets at 10 per 1 is 10b

Total cost of n bracelets at 11 per 1 is 11n

Adding both gives 1270

From i, b = 120-n

Substitute this into ii

10(120-n) + 11n = 1270

1200 - 10n + 11n = 1270

n = 1270-1200

n = 70

b = 120-n

b = 120-70

b = 50

Answer:

F = 250 N

Step-by-step explanation:

Given that,

Mass of an object, m = 50 kg

The coefficient of kinetic friction = 0.5'

We need to find the force of kinetic friction. The kinetic friction is given by the formula as follows :

[tex]F=\mu N[/tex]

N is normal force, N = mg

[tex]F=0.5\times 50\times 10\\\\F=250\ N[/tex]

Hence, the force of kinetic friction is 250 N. Hence, the correct option is (d).

Answer:

Step-by-step explanation:

183.5

Answer:

the answer is 183.5

Step-by-step explanation:

Answer:

The answer is 2

Step-by-step explanation:ckhg

1 added by 1 = 2.                hk,khgkhdgkgdlkg

Thanks for the free points! :D

Answer: 125lb < M < 155 lb

Step-by-step explanation:

The mean mass is 140 lb, and the deviation must be less than 15 pounds (exactly 15 is not accepted).

Then (140lb + 15lb) is not alowed, and (140lb - 15lb) is not alowed.

Then we can define M = mass.

We have the two equations:

M < 140lb + 15lb

M < 155lb

And

M > (140lb - 15lb)

M > 125lb

If we write these two relations togheter, we get:

125lb < M < 155 lb

Answer:

−  

8

5

​  

=−0.62500

Step-by-step explanation:

I used something Imao-

Answer:

Step-by-step explanation:

2x + 2*5 = 2x + 10

Answer:

2x + 10

Step-by-step explanation:

[tex]2(x+5)\\\\2x+10\\\\\left \{ {{2*x=2x} \atop {2*5=10}} \right.[/tex]

Hope this helps.

Answer:

80 Grams =

0.08 Kilograms

Step-by-step explanation:

A gram is a unit of weight equal to 1/1000th of a kilogram. A gram is the approximate weight of a cubic centimeter of water.

The kilogram, or kilogram, is the base unit of weight in the Metric system. It is the approximate weight of a cube of water 10 centimeters on a side.

   so basically you divided 80 divided by 10

4x⁴ = 1 - 3x²

4x⁴ + 3x² - 1 = 0

Factor the left side:

(4x² - 1) (x² + 1) = 0

((2x)² - 1²) (x² - i ²) = 0

(2x + 1) (2x - 1) (x - i ) (x + i ) = 0

Then

2x + 1 = 0   or   2x - 1 = 0   or   x - i = 0   or   x + i = 0

Solve for x :

x = -1/2   or   x = 1/2   or   x = i   or   x = -i

1) a = 2, b= 3, c=2,

2) x^2 -2x-4 (a = 1, b=-2, c =-4)

3) x^2+x+3 (a,b = 1, c = 3)

4) 7x^2+8x-4 (a=7, b=8, c=-4)

Answer:

600 mph

Step-by-step explanation:

60 x 10 = 600

Answer:

600

Step-by-step explanation:

if she travled 60 in 1 hour you multiply that by 10 so it woupd be 600 in 10 hours

Answer:

The correct option is;

90 degrees counterclockwise rotation

Step-by-step explanation:

The coordinates of the preimage before rotation = K(17, -12)

The coordinate of the image of the preimage after rotation = K'(12, 17)

Therefore, the rotation transformation, transforms, the preimage (x, y) to the image (-y, x), which is equivalent to a rotation of 90 degrees counterclockwise

B b B b B b B b B b B b B b B b B b B b B b B b B b B b B b B b B b B b B b B

Answer:

Its is A,C,D,

Step-by-step explanation:

Answer:

first quadrant

Step-by-step explanation:

Answer:

It describes multiplication

Step-by-step explanation:

As you can see its 5x-5 (the x is say "by" or "of), So when you look at it you can clearly see it's multiplication.

Answer:

9:6

Step-by-step explanation:

You can find x by setting the ratios equal to each other.

[tex]\frac{3}{2} = \frac{9}{x}[/tex]

Now you just need to solve for x.

[tex]\frac{3}{2} = \frac{9}{x} \\\frac{3}{2}x = 9\\x = 6[/tex]

The ratio is 9:6.

Answer:

9/6

Step-by-step explanation:

there ya go.

Answer:

c = 169

Step-by-step explanation:

Given

m² - 26m

To complete the square

add ( half the coefficient of the m- term)² to m² - 26m

m² + 2(- 13)m + (- 13)²

= m² - 26m + 169 ( with c = 169 )

= (m - 13)² ← perfect square

Answer:

n = 9

Step-by-step explanation:

5(n-3) = 30

Expand the brackets. (Multiply n by 5 then multiply -3 by 5.)

5n-15 = 30

Isolate 5n.

5n = 30+15

Evaluate.

5n = 45

Find n.

n = 45 ÷ 5

n = 9

Answer:

n = 9

Step-by-step explanation:

1) divide both sides by 5 to cancel it out

       (n-3=6)

2) add 3 to each side to cancel out the -3

       (n=9)

You could factor the 5 to get 5n-15=30 but dividing by 5 just makes the number easier