Answer:
X=-4, y=-7
Step-by-step explanation:
6x-5y=11. 1st equation
y=7x+21 2nd equation
6x-5(7x+21)=11. Sub value of y in 2nd equation (7x+22) into 1st equation
6x-35x-105=11. Solve by distributative property
-29x-105=11. Add x values
-29x=116. add 105 to both sides
x=-4. Solve for x
solve for y:
y=7x+21
y=7(-4)+21
y=-28+21
y=-7
check answer by substituting x and y into either equation
6x-5y=11
6(-4)-5(-7)=11
-24+35=11
11=11
simplify : the exact value of sin 240
Explanation: sin(240)=sin(60+180)=-sin60

Final answer: the required vaalue of the sin 240 is -0.87
An Independent variable can change the dependent variable because the independent variable can be changed alone while a dependent variable can also be changed by another variable.
correct me if I am wrong.
Depends on where you are in the math book but this would be the most simple way.
n= number
sqar(-1) = i
Answer:
Length: 360. Width: 240.
Step-by-step explanation:
360 * 2 = 720
240 * 2 = 480
720 + 480 = 1,200