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Scorpion4ik [409]
3 years ago
5

What is the value of X

Mathematics
2 answers:
dmitriy555 [2]3 years ago
7 0

Answer:

im prolly wrong but i think 90 XDDDD

Step-by-step explanation:

Ivahew [28]3 years ago
3 0

Answer:

71

Step-by-step explanation:

Attached file

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Huilan's age is two times thomas's age. the sum of their ages is 84. what is thomas's age?
igomit [66]
H is 2t
h + t = 84
2t + t = 84
3t =84
t = 28
Thomas is 28 and huilan is 56
3 0
3 years ago
Which of the following fractions does not represent a repeating decimal? 2/3, 4/5, 9/11, 8/9​
Misha Larkins [42]

Answer:

the answer is 4/5. The decimal does not repeat

7 0
3 years ago
What's a number that has exactly three factors???
Kay [80]
The factors of  4  are  1,  2,  and  4 .

The factors of  9  are  1,  3,  and  9 .
3 0
3 years ago
A manufacturer is planning to sell a new product at the price of 210 dollars per unit and estimates that if x thousand dollars i
sattari [20]

Answer:

Development costs: $2757

Promotion costs: $3155

Step-by-step explanation:

This might seem like a two-variable problem, but in actuality it's not - because the demand function is a sum of two components, each being independent and using only one variable, we can solve for the two separately.

Moreover, the price per unit and cost per unit is constant, so each product yields exactly $80 ($210 - $130).

Let's solve separately.

We need to maximize:

$80 * 160y/(y+4) - 1000y = $12800 * y/(y+4) - $1000*y

$80 * 170x/(x+7) - 1000x = $13600 * x/(x+7) - $1000*x

Let's go:

$12800 * y/(y+4) - $1000*y = $12800 * (1 - 4/(y+4)) - $1000y = $12800 - $51200/(y+4) - $1000*y

we analyze the derivative. $12800 is a constant, so we can skip it. Derivative of 1/(y+4) is -(y+4)^-2, derivative of $1000y is $1000.

deriv = $51200/(y+4)/(y+4) - $1000

We find the changepoints by analyzing $51200/(y+4)/(y+4) - $1000 = $0. We don't need to worry about y+4 = 0 because we cannot spend negative money on development/advertisement.

(y+4)^2 = $51.2

y+4 ~= 7.155417528 (or -y-4 = 7.1554... but it doesn't make sense because negative budget so we don't analyze).

y ~= 3.155417528

lastly, we should check that it's actually a maximum there - but it is, the original function goes to negative infinity.

rounding $1000y to the nearest dollar gives us $3155

Let's do the same for x:

$13600 * x/(x+7) - $1000*x = $13600 * (1 - 7/(x+7)) - $1000x = $13600 - $95200/(x+7) - $1000*x

deriv = $95200/(x+7)/(x+7) - $1000

$95200/(x+7)/(x+7) - $1000 = $0

(x+7)^2 = 95.2

(x+7) ~= 9.75704873412

x ~= 2.75704...

rounding $1000x to the nearest dollar yields $2757

3 0
3 years ago
Convert 498,000 into scientific notation​
Paladinen [302]

Hello! The answer to your question would be as followed:

<u><em>4.98 x 10^5 </em></u>

8 0
3 years ago
Read 2 more answers
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