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3 years ago

a book of books weighs 21 pounds, half the books are taking out now the box weighs 14.5. whats the remaining weight of the box

Mathematics

2 answers:

pantera1 [17]3 years ago

5 0

6.5 pounds left. i think

galben [10]3 years ago

5 0

Well you will have to find the other half like trying what is half of 21 then maybe then add that together what I do know is try to find what can equal 21 and that is your answer

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Which phrases can be used to represent the inequality 6.5 x + 1.5 less-than-or-equal-to 21? Select two options. The product of 6

Montano1993 [528]

Answer:

The option with “at most” and “no more than”

Step-by-step explanation:

These two phrases mean “greater than or equal to”

5 0

3 years ago

20 points!!

ANEK [815]

See below for the proof of the equation $\frac{ax + by}{x + y} - \frac{ax - by}{x - y}= 2(a - b)$

<h3>How to prove the equation?</h3>

The equation is given as:

$\frac{ax + by}{x + y} - \frac{ax - by}{x - y}= 2(a - b)$

Take the LCM

$\frac{(ax + by)(x - y) -(ax - by)(x + y)}{(x + y)(x - y)}= 2(a - b)$

Expand

$\frac{ax^2 - axy + bxy - by^2 -ax^2 - axy + bxy + by^2}{(x + y)(x - y)}= 2(a - b)$

Evaluate the like terms

$\frac{-2axy + 2bxy }{(x + y)(x - y)}= 2(a - b)$

Rewrite as:

$\frac{-2axy + 2bxy }{x^2 - y^2}= 2(a - b)$

Factorize the numerator

$\frac{2(a - b)(x^2 - y^2)}{x^2 - y^2}= 2(a - b)$

Divide

2(a - b)= 2(a - b)

Both sides are equal

Hence, the equation $\frac{ax + by}{x + y} - \frac{ax - by}{x - y}= 2(a - b)$ has been proved

Read more about equations at:

brainly.com/question/2972832

#SPJ1

5 0

2 years ago

Don gets $25 for whitewashing a fence. How many fences would he have to whitewash to earn a trip to camp that costs $165.00

Mademuasel [1]

The answer is 6.6 or if you wanted it rounded 7 hope that helped have a good day and always good luck

6 0

3 years ago

If f(x) = 3LX-2], what is f(5.9)? 9 10 11 12

Black_prince [1.1K]

Answer: 12

Step-by-step explanation:

We know that , the ceiling function y = [x] is also known as the least integer function that gives the smallest integer greater than or equal to x.

For example : For x= 1.5

y = [1.5] =2

For x= 3.64

y = ⌊3.64⌋=4

The given function :

Then, for x= 5.9 , we have

[since [3.9]=4 (least integer function)]

Therefore, the value of f(5.9) is 12

6 0

3 years ago

Read 2 more answers

I need help please!!!!

Luba_88 [7]

The first two is wrong, the last two is one of the right ones, I think it’s c

3 0

3 years ago