Answer:
k = 3
Step-by-step explanation:
Expand the left side and compare the coefficients of like terms on both sides.
(2x - 1)(kx + 1) ← expand using FOIL
= 2kx² + 2x - kx - 1
Compare the coefficients of the x² term on both sides
2k = 6 ( divide both sides by 2 )
k = 3
Since you are writing an inequality, you will want to look for the sign you need to write in place of the equal sign. Since, in the context, it states "less then 60 dollars", you will need to use the < sign. Next, you will need to find the main value, 200, and put it on the left sign of the inequality sign. Since you pay the friend 12 dollars per week, you will want to subtract 12x from 200. Your equation should now be :
200 - 12x < 60
You would then solve. help any?
Answer:
$2800
Step-by-step explanation:
let x represent the amount earned on the sale of a car
let y represent the amount earned on the sale of a truck
6x+3y=4800-eqn 1
8x+y=4600-eqn 2
Make y the subject of eqn 2
y=4600-8x
Plug y=4600-8x into eqn 1
6x+3(4600-8x)=4800
6x+13800-24x=4800
13800-4800=18x
18x=9000
x=9000/18=500
Now plug the value of x into eqn 2
8(500)+y=4600
4000+y=4600
y=600
So the amount earned on the sale of a car is $500 and $600 on the sale of a truck
Therefore,if 2cars and 3trucks are sold then
2($500)+3($600)
$1000+$1800
=$2800
Yes she will have left overs. The amount of left overs is 5. Because 5x25= 125. You can also do long division to solve it
2^9 - 2^4 = 496
when you multiply exponents, you just add the two (4 and 5) and keep the coefficient the same.
when you multiply by an exponent (^2), you multiple the exponents and keep the coefficient the same.