I'll tell you the answer but please know mental math strategies.it is very helpful in the future. message me if you need help with mental math
answers from top to bottom
16,7,6,24,2,12,12,9
1. To find out if (0,3) is a solution to y = x +3 you replace x and y with (0,3)
y = x + 3
3 = 0 + 3
3 = 3 Correct
The answer is YES
2. To find out if (1,-4) is a solution to y = -2x you replace x and y with (1,-4)
y = -2x
-4 = -2(1)
-4 = -2 Incorrect
The answer is NO
We can assume that the point the ladder creates with the ground and building is a triangle. You can use the Pythagorean theorem to solve this.
A^2 + B^2 = C^2
The ladder is C, and the building can act as A or B, so for the purpose of this explanation, I’ll make it A.
11^2 + B^2 = 14^2
Figure out the squares
121 + B^2 = 196
Subtract 121 from both sides
B^2 = 75
Square root B^2 and 75
B = 5 root3
Answer:
Probability is 0.3506
Step-by-step explanation:
We are given
mean is 8mm
so, 
standard deviation is 2.2 mm
so, 
x-varies from 7mm to 9mm
At x=7:
we can use formula
we can plug values
At x=9:
we can use formula
we can plug values
So, z is between -0.45455 and 0.45455
now, we can use normal distribution table
and we get
Probability is 0.3506
