Answer:
The correct answer is A.) 45 + 70x < 250.
y = mx + b
She started at 45 miles (+ 45).
She has to go at least 250 miles (< 250).
She is driving at a constant, unchanging speed of 70 mph (70x).
Answer:
6.32
5
254.34
Step-by-step explanation:
The lengths of the missing sides can be determined using Pythagoras theorem
The Pythagoras theorem : a² + b² = c²
where a = length
b = base
c = hypotenuse
first missing side
7² = 3² + x²
49 = 9 + x²
x² = 49 - 9
x² = 40
x = 6.32
second missing side
3² + 4²
9 + 16
= 25
√25 = 5
Area of a circle = πr²
Where : = π = pi = 3.14
3.14 x 9² = 254.34
Answer:
[1] Let's make the problem easier to start. Imagine that they had said to find the area of a sector bounded by a 360* arc (the whole circle). Could we have found the area then?
Sure we could! We know that A = pi*r^2, so that would just be:
A = pi*(6)^2 = 36*pi sq. miles.
Easy. But of course, we weren't so lucky... they want 135*... drat!
[2] Well, let's get a little closer, could we find the area if the angle was 180*? Sure! That's just half the circle. After all:
180*/360* = 1/2.
We know the whole circle is 36*pi sq. miles. So, the area bounded by a 180* arc would just be half of this: 18*pi sq. miles.
"But that's not the question," you scream!! Alright, alright, calm down... let's bring it all together.
[3] We know the area of the whole circle [1]. We also know that if we can figure out the fraction of the circle the problem is easy [2]. So, what fraction of a circle would match an arc of 135*?
Well, we can see that
135*/360* = 0.375 or 3/8
So the area is just 0.375 of the whole circle:
0.375* 36*pi sq. miles = 13.5*pi sq. miles
Read more on Brainly.com - brainly.com/question/2978439#readmore
6 8/10
simplify (divide by 2 )
6 4/5
Answer:
18:21 is equivalent to 18/21. When you simplify 18/21, you get 6/7
