Answer: 1/10
Step-by-step explanation:
At the end of the day, she still had 2/5 of the book to read. Which meant that she had read 3/5 of the book. Since she read 1/2 of the book in the day, we would read 3/5 - 1/2 = 6/10 - 5/10 = 1/10 of the book at night.
Answer:
yesterday 9 today 10
Step-by-step explanation:
46/5= 9.2
52/5= 10.4
Answer:
nnnnnnnnn
Step-by-step explanation:
Here you go, the same answer you gave me :)
Hello!
We must use a certain formula to calculate the surface area of a rectangular prism. The formula is:
A = 2 (wl + hl + hw)
Substitute:
A = 2(4 × 5) + (2 × 5) + (2 × 4)
A = 2(20 + 10 + 8)
A = 76 cm squared
ANSWER:
The surface area of the right rectangular prism is 76 centimetres squared.
Answer:
3) 67/441
Step-by-step explanation:
Comparing the given equation to the expressions you need to evaluate, you find there might be a simplification.
3x² +5x -7 = 0 . . . . . given equation
3x² +5x = 7 . . . . . . . add 7
x(3x +5) = 7 . . . . . . . factor
3x +5 = 7/x . . . . . . . . divide by x
Now, we can substitute into the expression you are evaluating to get ...
1/(3α +5)² +1/(3β +5)² = 1/(7/α)² +1/(7/β)² = (α² +β²)/49
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We know that when we divide the original quadratic by 3, we get
x² +(5/3)x -7/3 = 0
and that (α+β) = -5/3, the opposite of the x coefficient, and that α·β = -7/3, the constant term. The sum of squares is ...
α² +β² = (α+β)² -2αβ = (-5/3)² -2(-7/3) = 25/9 +14/3 = 67/9
Then the value of the desired expression is ...
(67/9)/49 = 67/441
