Answer:
Step-by-step explanation:
a) Here we have:
"In Family A, the youngest child is 7 years younger than the oldest, who is 18"
Let's define:
Y = age of the youngest child.
O = age of the oldest child.
Then we know that:
Y = O - 7
O = 18
Then we can replace the second equation into the first one:
Y = 18 - 7 = 11.
b) Here we have:
"In Family B, the middle child is 5 years older than the youngest child."
Let's define:
Y = age of the youngest child.
M = age of the middle child.
Here we have only one equation:
M = Y + 5.
Answer:
B x= number of adults 480-x = number of adults
To define a perpendicular rays, we first define a ray.
A ray starts from one point and extend it to form one direction.
If two lines or rays or line segments intersect at right angle (90°), then they are perpendicular.
In particular, Perpendicular rays are rays that intersect to form a right angle.
Four right angles are formed in the perpendicular rays.
Answer: 26
Step-by-step explanation:
