What is the value of the expression x^2y–y+xy^2–x for x=4 and y=0.25?

Mathematics

1 answer:

stepan [7]3 years ago

8 0

Answer:

0 (zero)

Step-by-step explanation:

${x}^{2} y - y + x {y}^{2} - x \\ = {4}^{2} \times 0.25 - 0.25 + 4 \times {0.25}^{2} - 4 \\ = 16 \times 0.25 - 0.25 + 4 \times 0.0625- 4 \\ = 4 - 0.25 + 0.25 - 4 \\ = 0 \\ \\ \purple {\boxed{ \bold{ \therefore \: {x}^{2} y - y + x {y}^{2} - x = 0}}}$

You might be interested in

Solve open parentheses square root of 7 close parentheses to the 6 x power = 49x−6.

LUCKY_DIMON [66]

(sqrt7)^6x = 49x - 6

There is no easy way to solve this . Drawing a graph will give a good approximation.

Draw y = (sqrt7)66x

and y = 49x - 6 and see where they intersect

Ill draw it on desmos graphing tool and give you the link.

7 0

3 years ago

Henri is a equipment manager for a soccer team. He buys a new trailer to move some equipment, and the specifications read that t

Vikentia [17]

His total load is 4*125 + 2*75 + 2*50, which is 750

now, is that 750 95% of 800?

well 95% of anything is 95/100 * anything

thus, 95% of 800 is 95/100 * 800 or 0.95 * 800

now, is that less than more or equals to 750? if it's, then he's golden, because his load is less or equals to 95% of 800, if not, then he needs to cut down some

4 0

3 years ago

Read 2 more answers

Can someone help me

Vladimir79 [104]

Answer:

sure, but what is there to help with?

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Please help :) will give brainliest

Natasha_Volkova [10]

Answer:

(x-2)(3x²-4 )

Step-by-step explanation:

First, you multiply 3x and 8 to equal 24x²
Then, you find the variables that equal -10x (-2x, and -12x)
then replace the -10x with the two variables you found (3x²-2x-12x+8)
Sperate the variable (3x²-2x) and (-12x+8)
Find the GCF of both x(3x-2) and -4(3x-2) (the binomial in the parentheses MUST BE THE SAME
Replace one of the parentheses with x-4
Answer: (x-2) (3x-4)

7 0

2 years ago

if u have a 2 digit reapeating decimal how do u convert it into a fraction ex.) 0.023 but 23 ia reapeting over and over how do u

Anna35 [415]

Almost 60 years after taking my last math class, I discovered
how to turn a repeating decimal into its equivalent fraction.

-- Take the set of digits that repeats, no matter how many digits there are.
Write them as the numerator of a fraction.

-- For the denominator, write the same number of '9's.

-- If it's possible and you feel like it, simplify (reduce) the fraction.

You have 0.023 with the 23 (two digits) repeating forever.

-- Write the 23 (two digits) as the numerator.

-- Write 99 (two digits) as the denominator.

Now you have the fraction 23 / 99 . It can't be reduced.

You actually had 0.0... before the repeating part. That just
means that the fraction has been divided by 10. The real
equivalent fraction is 23 / 990 . (Which also can't be reduced.)

After so many years not knowing how to do it, this still blows my mind.
Just now, I punched " 23/990 "into my calculator, and stared in wonder
and amazement when " 0.023232323 " came up.

7 0

3 years ago