
Let's do the bracket part first,
and solve further as shown,
Answer:
-18
Step-by-step explanation:
F(x)=-2x^2
f(-3) means substitute x with -3
= -2(-3)^2
= -18
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Given:
Rectangle: 320 x 190
triangle: base: 305
I'm assuming that the unit measure is in miles.
I found a map of Nevada and I figured that the length of the rectangle is serving as the height of the triangle.
Area of the rectangle = Length * width
A = 320 mi x 190 mi
A = 60,800 sq. mi.
Area of a triangle = (height * base) / 2
A = (320 mi x 305 mi) / 2
A = 97,600 sq. mi / 2
A = 48,800 sq. mi.
Total Area = 60,800 + 48,800 = 109,600 square miles.
The passenger train is going 120MPH and the freight train is traveling 40MPH
First figure out how many people are 1/4 of 84 by dividing 84 by 4 =21. Then multiply 21 by 3 to figure out how many people are 3/4 of 84 =63. 63 people guessed incorrectly and 21 people guessed correctly:)