Answer:
1) 12x-4
2) 5x^2+6x-3
Step-by-step explanation:
For number one, just multiply 3x-1 by for using the distributive property.
This would be 4(3x-1) = 12x-4.
For the second question, you know that you need to add something to 2x^2-6x-12 in order to get 7x^2-15.
2x^2 + ? =7x^2. The question mark would be 5x^2.
You can see that there is no x variable in 7x^2-15. That means you just need to take the opposite of -6x, which is 6x.
Finally to go from -12 to -15, you need to subtract 3.
This will leave you with 5x^2+6x-3
28: x+y = 90
we substitute y with the given function 4x - 10
x + 4x - 10 = 905x -10 = 90 5x = 100= 100 ÷ 5x = 20, now you can substitute x in 4x - 10 =4(20) - 1080 - 10 = 70, which makes sense as 20º +70º = 90ºyour 2 angles are 20º and 70º
29: x + y = 90 x = 2y
Same thing we did above, substitute the given variable into the given equation
so, 2y + y = 90 = 3y=90, divide the 3 to both sides, y = 30, now substitue the y into your given x variable.x = 2(30)x= 60this makes sense as 60º + 30º do equal 90ºyour two angles are 60º and 30º30: x + y = 90 y = 2 (x - 15)ill do this one without explanation as you know what I am doing from the above examples. here is the work:
x + 2(x-15)=90 (simplify)
x+2x-30 = 903x-30=903x = 120x = 40now input to other equation2(40 - 15) = y (USE PEMDAS)2(25) = yy = 50
makes sense because 50º + 40º = 90ºyour two angles are 50º and 40º
The chord that goes through the center of a circle, the diameter, is the longest chord in a circle. Any other chord will be shorter than this. The farther a chord is away from the circle, the shorter it will be. This means that chord CD is shorter than chord AB.
157.08m is the answer to this question.
Yes the answer is 14 good job
