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QveST [7]
3 years ago
14

Solve this pleaseplease​

Mathematics
1 answer:
tamaranim1 [39]3 years ago
6 0

Answer:

Step-by-step explanation:

cos(2a) = cos^2(a) - sin^2(a)

cos(2a) = 2cos^(a) - 1

cos(2a) = 11/25

11/25 = 2 cos^(a) - 1             Add 1 to both sides

1 + 11/25 = 2 cos^2

25/25 + 11/25 = 2 cos^2(a)

36/25 = 2 cos^2 (a)            Divide by 2

36/50 = cos^2 (a)               Take the square root of both sides.

6/5*sqrt(2) = cos(a)            

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Can someone please help me
djyliett [7]

Slope = (10 - 5)/(-9 + 15) = 5/6

y = mx + b where m = slope and b = y-intercept

b = y - mx

b = 5 - (5/6) (-15)

b = 5 +12.5

b = 17.5

Equation y = 5/6 x + 17.5

Y-intercept = 17.5

X-intercept when y = 0

So

5/6 x + 17.5 = 0

5/6 x = -17.5

x = (-17.5) (6/5)

x = -21

Answer

Y intercept (0, 17.5 )

X intercept (-21 , 0)

3 0
3 years ago
I NEED HELP ASAP IN THE PICTURE ABOVE
Sidana [21]

Answer:

Step-by-step explanation:

Even numbers are those that can be divided by 2.

3440 and 7802

Odd numbers are the rest

4893, 1451 and 6645

Smallest to largest

1451, 3440, 4893, 6645 and 7802

Sum of even numbers

3440+7802= 11242 divided by 2(there are only 2 numbers)

11242 ÷ 2 = 5621

4 0
3 years ago
Is (6,-10) a solution of y=3x-8
Vitek1552 [10]
You can easily test this if you know that (6, -10) corresponds to (X, Y). Knowing this, you can: 

X = 6
Y = -10

you put this into your equation:

-10 = 3*6 - 8

calculate it:

-10 = 18 - 8
-10 = 10
This is not true of course, -10 is not equal to 10. Therefore, (6, -10) is not a solution of y = 3x-8 :)
6 0
3 years ago
Write an equation in point-slope form of the line with slope –8 that contains the point j(–3, 2).
patriot [66]
The point-slope formula is y-y1=m(x-x1). You will then substitute into this equation. The answer will be y-2=-8(x+3).
4 0
3 years ago
There are 3 3/4 cups of flour 1 1/2 cups of sugar 2/3 cups of brown sugar and 1/4 cups of oil in a cake mix how many cups of in
maxonik [38]

Answer:

7 6/12

Step-by-step explanation:

8 0
3 years ago
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