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ankoles [38]
3 years ago
8

Please help me with this!

Mathematics
1 answer:
Verizon [17]3 years ago
6 0

Answer:

i think it has 4

Step-by-step explanation:

t + 15 is something on money

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Any one know how to find the roots of an equation?
soldier1979 [14.2K]
So what you do is
make into ax^2+bx+c=0 form

add-9/2 to both sides
y^2-2y+9/2=0
now we use the quadratice formula which is
x=\frac{-b+/- \sqrt{b^{2}-4ac} }{2a}

ax^2+bx+c=0
1y^2-2y+9/2
a=1
b=-2
c=9/2
subsitute
x=\frac{-(-2)+/- \sqrt{(-2)^{2}-4(1)(9/2)} }{2(1)}
x=\frac{2+/- \sqrt{4-(36/2)} }{2}
x=\frac{2+/- \sqrt{4-(18)} }{2}
x=\frac{2+/- \sqrt{-14} }{2}
x=\frac{2+/- \sqrt{-14} }{2}
x=1+/- \frac{\sqrt{-14} }{2}
x=1+/- \frac{\sqrt{14} \sqrt{-1}}{2}
x=1+/- \frac{\sqrt{14} i }{2}
x=1+/- \frac{ i \sqrt{14} }{2}

answer is C



6 0
3 years ago
15 point help asap marking brainlest!!!!!!!!!!!!!!
ziro4ka [17]

slope =(y2-y1)/(x2-x1)

m=(-1-5)/(1--1)

m=-6/2

m=-3

y-y1=m(x-x1)  point slope form

y-5 = -3 (x--1)

y-5 = -3 (x+1)

distribute

y-5 = -3x -3

add 5 to each side

y = -3x+2

Choice D


4 0
3 years ago
Read 2 more answers
Rashal is adding the expression below. Negative 3 + left-bracket (negative 7) + (negative 6) right-bracket First, he rewrites th
diamong [38]
I think it is 3 I think I’m not sure
6 0
3 years ago
Read 2 more answers
Brendon sells tires at the local auto parts store. He told a customer that the tire width for a new tire was 21.5 centimeters. W
fenix001 [56]

Answer:

215 mm

Step-by-step explanation:

1 cm = 10 mm

21.5 cm * (10 mm)/(1 cm) = 215 mm

Answer: 215 mm

3 0
3 years ago
D<br> d = 4.5 yd<br> Calculate the circumference of the circle.
timurjin [86]
14.14 cuz that’s the equation for diameter to circumference

4 0
3 years ago
Read 2 more answers
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