Answer:
The answer is c.
Step-by-step explanation:
C is correctttttt!!
This is a quadratic whose graph will be the shape of a U.
when x = 0 y = 0 so it will pass through the origin ( the point (0,0).
Plot a few more points - say when x = 1 and x = -1 . Also when x = 3 and x = 3
For example when x = 1 y will be -1 - 1^2 = 0 giving the point (1, 0)
Note the minimum point will be (0.5, -0.25)
Answer:
2520°
Step-by-step explanation:
The sum of the angles in any triangle is 180°
shape. sides. triangles. sum int angles.
triangle. 180×1=180°
quad. 180×2=360°
pentagon. 180×3=540°
n-sides. n( n−2) 180(n−2)
16-sides. 180×14=2520°
Answer:
15 shelves
Step-by-step explanation:
6 dvds = 1 shelf
89/6= 14.8333333333 shelves
But you cannot have 0.8333333333 shelves so you would round 0.8333333333 to 1
ANSWER
Stacy's speed is 78 mph and Eric's speed is 41 mph.
EXPLANATION
Let Stacy's speed be x.
Let Eric's speed be y.
Stacy travels 4 mph less than 2 times as fast as Eric. This means that:
x = 2y - 4 ____(1)
After 6 hours, they are 222 miles apart. This means that:
Stacy's distance = d miles
Eric's distance = (d - 222) miles
Speed is given as distance divided by time.
So, for Stacy, after 6 hours:
x = d / 6
=> d = 6x
and
For Eric:
y = (d - 222) / 6
Cross multiply:
6y = d - 222
d = 6y + 222
Equate the two d's:
6x = 6y + 222
=> 6x - 6y = 238 ___(2)
We now have two simultaneous equations:
x = 2y - 4 ____(1)
6x - 6y = 222 ___(2)
Put (1) in (2):
6(2y - 4) - 6y = 222
12y - 24 - 6y = 222
6y - 24 = 222
Collect like terms:
6y = 222 + 24
6y = 246
y = 246 / 6
y = 41 mph
Recall that:
x = 2y - 4
x = 2(41) - 4
x = 82 - 4
x = 78 mph
So, Stacy's speed is 78 mph and Eric's speed is 41 mph.