Answer:
-3
Step-by-step explanation:
A negative plus a positive is like subtraction. But make sure you make your answer negative.
Y<1-6x
Insert the values of
x
=
x
=
and
y
=
y
=
into the equation to find if the ordered pair is a solution.
y
<
1
−
6
x
y
<
1
-
6
x
Rewrite so
x
x
is on the left side of the inequality.
1
−
6
x
>
y
1
-
6
x
>
y
Subtract
1
1
from both sides of the inequality.
−
6
x
>
y
−
1
-
6
x
>
y
-
1
Divide each term by
−
6
-
6
and simplify.
Hi, Siyasi2 ! Let x = the number of hot dogs, y = the number of chips, and z = the number of drinks. Then we know:
5x + 4y + 5z = 15.75
x = y + 0.75
z = 2x - 1
Let's substitute the 3rd equation into the first one.
5x + 4y + 5(2x - 1) = 15.75
5x + 4y+ 10x - 5 = 15.75
15x + 4y = 20.75
Now, let's re-write the 2nd equation as x - y = 0.75
We now have a system of two equations with two unknowns.
15x + 4y = 20.75
x - y = 0.75
To solve this, we can multiply the bottom equation by 4 and add.
15x + 4y = 20.75
+ 4(x - y = 0.75)
19x = 23.75
or x = 1.25
If x = 1.25, then using the one of the equations above, we can solve for y.
x - y = 1.25 - y = 0.75
.50 = y
Since z = 2x - 1, then z = 2(1.25) - 1 = 2.5 - 1 = 1.50
So, a hot dog is $1.25, chips are 50 cents, and a soft drink is $1.50. Please let me know if you have any questions.
Answer:
<em>17 / 8</em>
Step-by-step explanation:
sec A = 
cos A = 
= 
⇒ <em>sec A = </em>
<em> </em>
Answer:
y = 4/3x - 3
Step-by-step explanation:
4x - 3y = 9
+ 3y + 3y
4x = 3y + 9
- 9 -9
4x - 9 = 3y
divide all by 3
4/3x - 3 = y
