Jim bought x iphones for seven coupons each and sold y android phones for 4 coupons each. He got 20 coupons.
Julia bought the same number iphones for 3 coupons each and bought the same number Android phones for 4 coupons each. She got 20 coupons too. Please find quantity of iphones they will get and quantity of Android phones sold by Jim and got by Julia
{7x-4y=20
+
{3x+4y=20
10x=40
x=4
28-4y=20
4y=8
y=2
Answer
x=4; y=2
Jim and Julia bought 8 iphones and Jim sold 2 Android phones. Julia bought 2 Android phones.
The given function is
f(x) =
Comparing with
We get
a = 8, b = 2 & c = -5
Now if (h,k) is the vertex
then h =
Substituting the value of h in place of x in the function we get
k=
Now the vertex form of a quadratic equation is
f(x)= a(x-h)² + k
Substituting the values of a, h & k we get
f(x) = 8
The vertex form of f(x) = 8x² +2x-5 is
f(x) =
Answer
Answer:
This type of data is called Box and Whisker plots
Step-by-step explanation:
This type of data tells you the range of the data as well as the inner quartile range as it shows the minimum, maximum, median, and Q1 and Q3.
Answer:
go Amoeba and Paramecium.
Step-by-step explanation:
Answer:
x = 0, -3, 3
Step-by-step explanation:
When f(x) = 0, this means the y-coordinate is 0. Look at the graph to see where f(x) intersects at y = 0.
It intersects at (-3, 0), (0, 0), and (3, 0).