Answer:
= t<2t is less than 2\(t<2\)
Answer:
A
Step-by-step explanation:
given
16x² + 16xy + 4y²
an expression factorised as a perfect square has the form
(ax + by)²
= a²x² + 2abxy + b²y²
16x² + 16xy + 4y² ← is in this form
with a² = 16 , b² = 4
so a = = 4 and b = = 2
then 2ab = 2(4)(2) = 16
Thus
16x² + 16xy + 4y² = (4x + 2y)² ← in factorised form
Answer:
Barista Alex should use 700g of bean A (with 25% bitterness) and 300g of bean B (with 75% bitterness) to create his 1000g batch with a bitterness level of 40%.
Step-by-step explanation:
To create a 1000g batch of coffee blend with a bitterness level of 40%, you can use a weighted average based on the bitterness levels of the two beans, bean A (25%) and bean B (75%).
Let x be the amount of bean A (with 25% bitterness) and y be the amount of bean B (with 75% bitterness) in the blend. You want the total batch to be 1000g, so we have:
x + y = 1000
Now, to achieve the desired bitterness level of 40%, you can set up the following equation based on the weighted average:
(25% * x + 75% * y) = 40% * 1000
Now, let's convert the percentages to decimal values (divide by 100):
(0.25x + 0.75y) = 0.40 * 1000
Simplify:
0.25x + 0.75y = 400
Now you have a system of two equations:
x + y = 1000
0.25x + 0.75y = 400
You can solve this system of equations. Let's use the substitution method. Solve equation (1) for x:
x = 1000 - y
Now, substitute this expression for x into equation (2):
0.25(1000 - y) + 0.75y = 400
Now, solve for y:
0.25 * 1000 - 0.25y + 0.75y = 400
0.75y - 0.25y = 400 - 250
0.5y = 150
y = 150 / 0.5
y = 300
So, he should use 300g of bean B (with 75% bitterness). Now, you can find the amount of bean A by using the first equation:
x + 300 = 1000
x = 1000 - 300
x = 700
Therefore, Barista Alex should use 700g of bean A (with 25% bitterness) and 300g of bean B (with 75% bitterness) to create his 1000g batch with a bitterness level of 40%.
Let f(x) = 2x + 2. Solve f−1(x) when x = 4.
Let f(x) = x + 8 and g(x) = x2 − 6x − 7. Find f(g(2)).
Let f(x) = x2 − 8x + 5. Find f(−1).
Answer:
Part 1) and
Find f(g(x)).
Substitute value of g(x) in place of x
So,
Part 2)
Replace y with x and x with y
Find y
So,
Substitute x = 4
Part 3) and
Substitute value of g(x) in place of x
Substitute x = 2
Part 4)
Substitute x = -1
Chuck and Max each 3/8 paint of the wall. How much of the wall do they paint all together?
Enter your answer in the box.
of the wall
Answer:
2/8 + 3/8 +3/8 = 8/8
They finished the wall
2x – y = –2
x + 2y = 24
x – 2y = –16