Answer:
Step-by-step explanation:
equation (1): 
equation (2): y=2x
solve the system by substitution
step1: sub (2x) for y in equation 1:
step2: simplify the expression:
(divide by 2 for both sides)
To find the value for y sub 21/4 for x in equation 2:
y=2x
y=2×(21/4)
<span>multiply 42.50 by 10% then add that answer to 42.50 to get the total price she will have to pay.</span>
In a short answer, to find average you need to add it all up and divide by the number of things you added. Ex. say I want to find the average for my english class, my grades are 90, 98, 100, 87, and 70. I would start by adding them up to get 445. then since i have 5 grades, i would divide the sum 445 by 5 and get an 89 as my average.
(Everything in this answer is example only, not my real grades.)
No solution hope I helped!
Answer:
A) 108
Step-by-step explanation:
Use the equation- 180(#of sides minus 2) to find the total degrees in a pentagon.
180(5-2)
180(3)
540- total degrees in a pentagon
540÷5=108-> to find each side (aka measure of z)
