Answer:
A
Step-by-step explanation:
x + y = 4a + 7
x - y = 2a + 5
In both equations, make x the subject of the formula
x = 4a + 7 - y equation 1
x = 2a + 5 + y equation 2
Subtract equation 2 from equation 1
2a + 2 -2y
= 2a + 2
Well, you need to find it in y=mx+b format.
the point you have is (-2, 1)
The z-score for 45cm is found as follows:
![z=\frac{45-49.2}{1.8}=-2.33](https://tex.z-dn.net/?f=z%3D%5Cfrac%7B45-49.2%7D%7B1.8%7D%3D-2.33)
Reference to a normal distribution table, gives the cumulative probability as 0.0099.
Therefore about 1% of newborn girls will be 45cm or shorter.
90 miles per hour is its average speed.
Answer:Not Here
Step-by-step explanation:.dd