Answer:
-1
Step-by-step explanation:
putting x=-3 in the function
-2(-3)-7
6-7
-1
Answer:
$64
Step-by-step explanation:
1/4 means 25%
$48 means 75%
$48 divided by 3 equals 16
$48 plus 16 equals $64
Answer: 106 km/h,2.5 hr
Step-by-step explanation:
Given
The train travels 315 km in the same time car travels 265 km
The average speed of the train is 20 kmph faster than car
Suppose, speed of the car is v and it travels 265 km in t hours

Time taken to travel is
Product og 26.22 and 3.09 = 26.22*3.09 = 81.0198
Sum of the rest of the numbers= 3,507+2.08+11,5+16.712= 33. 799
Difference between the pro dust and sum= 81.0198-33.799=47.2208
Check if all the numbers are correct, I haven´t.
Answer:
Triangle ABC is not a Right Triangle
Step-by-step explanation:
The perimeter of a triangle is all of the sides added together so we can model our equation like so:
AB + BC + CA = P
or
8 + 5 + CA = 22
We first combine like terms
13 + CA = 22
Then make the variable have no numbers on its side
13 + CA = 22
-13 -13
CA = 9
So now that we know what CA is, we can determine whether or not its a right triangle
We can use the Pythagorean Theorem for this:
a^2 + b^2 = c^2 (the '^' symbol means 'to the power of')
or
5^2 + 8^2 = 9^2
Now we Solve
5^2 = 25
8^2 = 64
9^2 = 81
25 + 64 =? 81
89 does not equal 81
So Triangle ABC is not a Right Triangle