Answer:
k
Step-by-step explanation:
Answer:
T = $12
S =$18
Step-by-step explanation:
This question would be solved using simultaneous equation
Let t = cost of t-shirt
s = price of sweatshirt
two equations can be derived from this question
12s + 8t = 312 eqn 1
8s + 13t = 300 eqn 2
Multiply eqn 1 by 8 and eqn 2 by 12 :
96s + 64t = 2496 eqn 3
96s + 156t = 3600 eqn 4
subtract eqn 3 from 4
92t =1104
t = 12
Substitute for t in eqn 1
12s + 8(12) = 312
12s + 96 = 312
12s = 216
s = 18
Answer:
To determine if two lines are parallel or perpendicular, we need to examine their slopes.
First, let's rearrange the second equation, x+y=-5, to slope-intercept form (y = mx + b):
y = -x - 5
In this form, we can see that the slope of the second line is -1.
The first equation, y=x-8, is already in slope-intercept form, y = mx + b, where the slope is 1.
Comparing the slopes, we can see that the slopes of the two lines are different. The slope of the first line is 1, and the slope of the second line is -1.
Since the slopes are not equal, the lines are not parallel.
Now, let's determine if the lines are perpendicular:
Two lines are perpendicular if the product of their slopes is -1.
The slope of the first line is 1, and the slope of the second line is -1.
Since 1 * -1 = -1, the product of the slopes is -1.
Therefore, the lines y = x - 8 and x + y = -5 are perpendicular.
Step-by-step explanation:
Answer: Perpendicular
Our task is to identify if these lines are parallel or not. The lines are :
A good move would be to write these two equations in the same format. The easiest one is slope-intercept. Equation 1 is already in this form, but the second one isn't.
To write the second equation in slope-intercept, all we need to do is subtract x from both sides, and we get:
Now, switch the terms:
The slope of the first line is 1, and the slope of the second line is -1.
They can't be parallel, since their slopes are not the same. For them to be perpendicular, their slopes should be negative reciprocals of each other.
Is -1 the negative inverse of 1? Yes.
a=alan
b=billy
c=charlie
a is 80% more than charlie means that a is 100% and billy=20%, so 20% of alan=billy
0.2a=c
b has 3/5 of c
b=3/5c
if b-150 and c+150, (c+150)=3 times (b-150)
luckily we can related c and b
b=3/5c
c+150=3(3/5c-150)
distribute
c+150=9/5c-450
add 450 both sides
c+600=9/5c
minus c both sides
600=4/5c
times 5/4 both sides
750=c
charlie has 750 stamps
billy=3/5 times c
b=3/5 times 750
b=450
allan has 80% more than billy
0.2a=b
0.2a=450
divide both sides by 0.2
a=2250
b=450
a=2250
c=750
add them
a+b+c=2250+450+750=3450 stamps
Answer:
20x−50; $1,450
Step-by-step explanation: