First, solve for x
x + y = 6
+
2x - y = 9
——————
3x = 15
x = 5
then just substitute that into one of the equations
(5) + y = 6
y = 1
then make into an ordered pair (x,y)
(5, 1)
Answer:
Lori spends <u>9 minutes</u> on sketching 
th of a sketch.
Step-by-step explanation:
Given equation:
where 
number of minutes Lori spends on sketching
and 
number of sketches Lori makes.
We need to calculate the time spent by Lori in sketching of a sketch.
So we know the value of 
as 
represents number of sketches and in this situation Lori has sketched only a fraction of a painting.
So we plugin in the equation and calculate 
which is time spent by Lori sketching th of a sketch.
∴ 
minutes (Answer)
∴ Lori spends 9 minutes on sketching th of a sketch.
Answer:
3^1
Step-by-step explanation:
3^-5 * 3^6
When multiplying exponents with the same base, we can add the exponents
3^ ( -5+6)
3^1
Y = 7x, if x equals the number of hours and y equals the amount of money charged.
We can use these variables:
A = number of ounces for solution A
B = Number of ounces for solution B
A + B = 20
Now, we can use decimal conversions.
0.65A + 0.80B = 0.70(120)
Next step: We substitute A into 120 - B to show their relationship.
0.65(120 - B) + 0.80B = 84
Now onto the next equation:
78 - 0.65B + 0.80B = 84
0.80 - 0.65 = 0.15, so…
0.15B = 84 - 78
0.15B = 6
B = 6 divided by 0.15
B = 40 ounces
To find A, we can simply plug B into the starting equation.
A = 120 - 40
A = 60 ounces
Your final answer: The scientist should use 60 ounces of solution A and she should use 40 ounces of solution B. Yeah
