The answer is gonna be -9
<span>-7x + 8y = -9
8y = 7x - 9
y = 7/8x - 9/8
so line </span><span>-7x+8y=-9 has slope = 7/8
</span><span>perpendicular lines, slope will be opposite and reciprocal
so new line has slope = -8/7
passing thru </span><span>(2,-5)
</span>y = mx + b
-5 = -8/7(2) + b
-5 = -16/7 + b
b = -5 + 16/7
b = -35/7 + 16/7
b = -19/7
equation
y = -8/7x - 19/7
hope it helps
Answer:
3x - 2
Step-by-step explanation:
To find tye difference between 2x - 3 and -x - 1, subtract the two expressions
2x - 3 - (-x - 1)
2x - 3 + x + 1
3x - 2
7 or 8 since 2 and a half hours isnt an even amount of time so thered be an extra 10 minutes
To find the solutions to this equation, we can apply the quadratic formula. This quadratic formula solves equations of the form ax^2 + bx + c = 0
x = [ -b ± √(b^2 - 4ac) ] / (2a)
x = [ -8 ± √((8)^2 - 4(2)(3)) ] / ( 2(2) )
x = [-8 ± √(64 - (24) ) ] / ( 4 )
x = [-8 ± √(40) ] / ( 4)
x = [-8 ± 2*sqrt(10) ] / ( 4 )
x = -2 ± sqrt(10)/2
The answers are -2 + sqrt(10)/2 and -2 - sqrt(10)/2.