a man is twice as old as his son. 20 years ago the sum of their age is 85​

Answer:

{-2,1,0,3}

Step-by-step explanation:

I just looked it up lol

plz mark me brainliest

These relations all follow from the identity,

sin(x - y) = sin(x) cos(y) - cos(x) sin(y)

Notice that 160° = 180° - 20°, so if x = 180° and y = 20° above, we get

sin(160°) = sin(180°) cos(20°) - cos(180°) sin(20°)

We know sin(180°) = 0 and cos(180°) = -1, so we end up with

sin(160°) = sin(20°)

For the other, notice that 200° = 360° - 160°, and 340° = 360° - 20°.

Answer:

Step-by-step explanation:

sin 20 is the same as sin 60 because 180-60=20. sin 20 is the same as -sin200 because 200-180=20

sin 340 is the same as sin 20 because 360-340=20. So all four of these connect and they all equal 20. Also, they all equal .3420 (rounded)

Answer:

20

Step-by-step explanation:

jdjdjsnnxkdkcndjkx

Answer:

20 years

Step-by-step explanation:

Hope this helps!

Brainiest?

Answer:

I don't know if you want it with variables or the actual #s but here ya go...

a+b+c=21

6+7+8=21

Answer:

It is actually less than 10.

Step-by-step explanation:

Answer:

UW = EW+UE=2×EW because, EW=UE

7x-2=2×6= 12

7x=14

x=14/7

x=2

Answer:

300

Step-by-step explanation:

100% of 150 is literally 150, add those together and you get 300.

Answer:

the answer is $300

Step-by-step explanation: when increasing by 100% it is the same as multiplying by 2

Answer:

The ladder is 10 ft long...

Answer:

5000

Step-by-step explanation:

In a right triangle ,

[tex] {c}^{2} = {a}^{2} + {b}^{2} [/tex]

[tex] = > c = \sqrt{ {a}^{2} + {b}^{2} } [/tex]

where -

According to the question , let the hypotenuse of the triangle be 'c' . So ,

[tex]c = \sqrt{ {3000}^{2} + {4000}^{2} } [/tex]

[tex] = > c = \sqrt{9000000 + 16000000} [/tex]

[tex] = > c = \sqrt{25000000} = 5000[/tex]

Hence , c = 5000

Answer:

5000

Step-by-step explanation:

[tex]3000^{2}[/tex] + [tex]4000^{2}[/tex] = 25000000

[tex]\sqrt{25000000}[/tex] = 5000

Answer:

1) Strong correlation

2) no correlation

3a) 2008       3b) 47       3c) The authors are trying to communicate the number of male teachers in different school years

4b) inches of rain (r) = (around) 0.6

Step-by-step explanation:

Answer:

y = -3x-2

Step-by-step explanation:

Well, the linear equation of a line is:  y = mx + b

Where m is the slope and b is your y-intercept

So, you can just plug the numbers into the equation

m = -3 and b = - 2

y = -3x - 2

hope its correct! good luck! :)

Answer

Molly's mother is 36 years old now.

Step-by-step explanation:

Answer:

Molly's mother is 36 now.

Step-by-step explanation:

(I could go the algabraic way, but I'd prefer not to. I'd rather guess. )

If Molly would be 24 in 12 years and her mother would be 48 at that time, then Molly is 12 now. Her mother would be 36 now.

Well, that didn't take too long! I hope this helps!

Answer:

70%

Step-by-step explanation:

15/20 is simplified to 3/4

Answer:

75%

Step-by-step explanation:

5x4= 20.  Which means it goes by 25%

25% = 5dollars 50%= 10 dollars 75%= 15 dollars 100%= 20 dollars

Answer:

column 1, (2 and 2)

column 2, (8 and 4)

Step-by-step explanation:

For the first one, y = 2[tex]x^{2}[/tex]. You would plug in 1 into x and since one times itself is one, you would end up with 2. For the next question, you would plug in one and find that two times one is two. For the next column, by plugging in 2, you would find that you would end up with 2 times 4 and thus, you would find the answer which is 8. Lastly, two to the power of two is 4. Hope this helped!

Answer:

OD

Step-by-step explanation:

The zero x=8 will make the factor (x-8) = 0 and the zero x=3 will make the factor (x-3) = 0.

so it's (x-8) and (x-3)

Answer:

-20

Step-by-step explanation:

Below means negative

Answer:

Um what is this

Step-by-step explanation:

Answer:

0.67, 1.24, 12, 55, 100

Step-by-step explanation:

Answer:

(2,5)

Step-by-step explanation:

The intersection point of 3x+y=11 and y=x+3 is (2,5) on a graph.

Answer:

it will cost 1820

Step-by-step explanation:

add 100 + 40=140 x 13=1820

Hoped it helps

Answer:

[tex]y= 4 + 3h[/tex]

Step-by-step explanation:

Step one:

Given data

We are given that the initial distance walked is  4 miles

Also, the rate/ speed with which you are currently walking is 3 miles per hour

let the time taken be hours

and let the total distance be y

Step two:

We want to write an expression for the total distance

The total distance is given as

[tex]y= 4 + 3h[/tex]

Answer:

0.02, 0.17, 0.2, 0.72, 2.27

Step-by-step explanation:

that's the answer!

Answer:

0.6 ÷ 0.3 - Option 2.

0.2 × 0.9 - Option 3.

Answer:

19, 2

Step-by-step explanation:

let the 2 numbers be x and y with x > y , then

x + y = 21 → (1)

x - y = 17 → (2)

Add the 2 equations term by term to eliminate y , that is

2x = 38 ( divide both sides by 2 )

x = 19

substitute x = 19 into (1) for value of y

19 + y = 21 ( subtract 19 from both sides )

y = 2

The 2 numbers are 19 and 2

Answer:

mAB = 7

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Equality Properties

Algebra I

Step-by-step explanation:

Step 1: Define

Set up equation.

mAB + mBC = mAC

x + 4 + 4 = 3x + 2

Step 2: Solve for x

Step 3: Find AB

Answer:

Step-by-step explanation:

4) the first thing to notice is that the sides a and c are the same.. that's what the small marks are telling  you...  that are the same length. and since they are.. this is an isosceles triangle and the two angle at the base  .. along the b side will be the same.. so solving y is just the same as  A or 52°

then to solve for x we also need to use that the triangle add up to 180° on those inside angles..

180= 52+52+14x+6

maybe you can solve it from here.. but i'll do it quickly

70 = 14x

5=x

5) the exterior angle at C is 146 the total angle is 180 so the angle inside the triangle is 180=146+x      x= 34°

then use that the interior of the triangle add up to 180 again

180 = 34 + 5y+3 + 4y + 8

180 = 45 +9y

135 =9y

15 = y

:)

Answer:

b

Step-by-step explanation:

5^2 + 8^2 = 12^2

25 + 64 = 144

89 does not equal 144

Answer:

I think its 21 because 45x21= 945+34= 979

Step-by-step explanation: