Answer:
y=2 -7x-4
three linear equations
c=-4 ;4a+b=1 ; 9=a-b
Step-by-step explanation:
Simply assume a standard parabola equation y=a +bx +c
(here a, b, c are three independent variables)
Three coordinates as shown in graph are (0,4), (4,0) ,(-1,5)
Now put these points in the equation of parabola and get three linear equations.
[1] c=-4
[2] 4a+b=1
[3] 9=a-b
Now substitute value of a from equation 2 into 3 in terms of b
a=
9=-b
b=-7
a=2
y=2 -7x-4
Answer:
B. 3.52
Step-by-step explanation:
4.20+1.80=6.00
6.00 x .08 (8% tax)=.48 tax
6.00+ .48=6.48 total cost
10.00-6.48=3.52 change from a $10 bill
<u>Answer</u>:
x = 5
<u>Explanation</u>:
If the angle are parallel:
step 1:
21x + 7 = 22x + 2
21x - 22x = 2 -7
-x = -5
x = 5
finding upper angle, then when both lies on straight line equals to 180°
step 2:
180 = (180 - 22x - 2 ) + 21x + 7
180 = 180 - 2 + 7 - 22x + 21x
180 = -x 185
-5 = -x
x = 5
This is ur homework what number do u need help on what grade are u in all of these questions are hard in my opinion I am in 4th grade good luck
Answer:
(1 - 2/5) shirts are left
x ≥ 200
Solution means that before 2/5 shirts were sold, there were 200 shirts.
Step-by-step explanation:
Given in the question the inequality
3/5x + 30 ≥ 150
Suppose number of shirts that were on display = x
A)
Explain what 3/5 means in the in equality
As stated in the question2/5 of the shirts are sold means
(1 - 2/5) shirts are left
3/5 = (1 - 2/5)
B)
3/5x + 30 ≥ 150
3/5x ≥ 150 - 30
3/5x ≥ 120
x ≥ 120 * (5/3)
x ≥ 200
C)
Solution means that before 2/5 shirts were sold, there were 200 shirts.