You need to solve for x or y in one equation and and substitute it into the other equation in place of the variable that corresponds to it.
Firstly you have to multiply both sides by 2 to get rid of the fractions. This leaves you with x + 18= 8. If you take away 18 from both sides you can see that x = -10
Answer:
a) Ellipse
b) Sphere
c) Great circle
d) Triangle
e) Circle
Step-by-step explanation:
A) Diagonal cross section of cylinder
Ellipse
B) Shape created when a semi circle is rotated about y axis
Sphere
C) Diagonal cross section through the widest part of sphere
Great Circle
D) Perpendicular cross section of cone
Triangle
E) Cross section parallel to the base of cone
Circle.
<u>Answer:</u>
Heather = 18 messages
Brian = 25 messages
Austin = 54 messages
<u>Step-by-step explanation:</u>
We know that Heather, Brian, and Austin sent a total of 97 messages.
Assuming the number of messages sent by Brian as x, we can say that Heather sent x-7 messages (7 fewer messages than Brian) and Austin sent 3(x-7) messages (3 times as many as Heather).

So Brian sent (x) messages = 25 messages,
Heather sent (x-7) messages = 25 - 7 = 18 messages; and
Austin sent 3(x-7) messages = 3(25-7) = 54 messages
Answer:
<u>Answer</u><u> </u><u>is</u><u> </u><u>1</u><u>/</u><u>6</u>
Step-by-step explanation:
