Answer:
1)
(x + 3)(x + 4) = x^2 + 4x + 3x + 12 = x^2 + 7x + 12
Instead of multiplying 3 and 4 the student added them which gave them the answer of 7 when the correct answer is 12.
2)
a) x^2 + x - 2
b) x^2 - 7x + 10
c) 4x^2 - 1
d) x^2 + 10x + 25
Step-by-step explanation:
a. (x - 1)(x + 2)
x(x) - 1(x) + 2(x) - 1(2)
x^2 - 1x + 2x - 2
x^2 + x - 2
------------------------------------------
b. (x - 5)(x - 2)
x(x) - 5(x) - 2(x) - 5(-2)
x^2 - 5x - 2x + 10
x^2 - 7x + 10
------------------------------------------
c. (2x + 1)(2x - 1)
2x(2x) + 1(2x) - 1(2x) + 1(-1)
4x^2 + 2x - 2x - 1
4x^2 - 1
------------------------------------------
d. (x + 5)^2
(x + 5)(x + 5)
x(x) + 5(x) + 5(x) + 5(5)
x^2 + 5x + 5x + 25
x^2 + 10x + 25
Answer:
25 animals
Step-by-step explanation:
The company can not produce enough reels.
Step-by-step explanation:
Reels produced per day = 800
Production cut = 1/5
Let, the daily production be 1.
therefore,
New per day production = 1-
New per day production = 4/5
Therefore,
4/5 of 800 = New no. of reels produced per day
= New no. of reels
640 = New no. of reels
New. no of reels produced per day = 640
Reels produced in 30 days = 640*30 = 19200
The company can not produce enough reels.
Keywords: fraction, multiplication
Learn more about fractions at:
#LearnwithBrainly
7.4x-9.2=2.6+5.2
Simplify
7.4x-9.2=7.9
add 9.2 to both sides
7.4x=17.1
divide both sides by 7.4
x=<span>2.31081081081 (about)</span>
Answer:
This is the graph. It is a normal square root function, but translated down 6 units.
