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3 years ago

What is the answer to this equation? x - 0.4x

1 answer:

3 0

X-0.4x if the term doesn't have a coefficient, it is considered that the coefficient is 1

1x-0.4x Collect the light terms by subtracting their coefficients

(1x-0.4)x Subtract the numbers

0.6x is the answer

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A calculator is required to obtain the final answer on this question. A solid metal sphere at room temperature 20oC is dropped i

yKpoI14uk [10]

Answer:

T = 47.1875°C

Step-by-step explanation:

Given:

Surrounding temp, Ts = 100°C

Initial Temperature ,T0= 20°C

Increase in temperature = 15°C

Final temperature, T = 20 + 15 = 35°C

Time, t = 9 seconds

Let's take Newton's law of cooling:

$T - Ts = (T_0 - Ts)e^k^t$

We'll solve for k

$35 - 100 = (20 - 100)e^9^k$

$-65 = (-80)e^9^k$

Divide both sides by -5

$13 = (16)e^9^k$

$9k = ln (\frac{13}{16})$

$k = \frac{1}{9} ln (\frac{13}{16})$

$k = -0.02307104053$

Let's now find the temperature of the ball after 18 seconds in boiling water.

Use the Newton's equation again:

$T - Ts = (T_0 - Ts)e^k^t$

$T - 100 = (20 - 100)e^-0.0^2^3^0^7^1^0^4^0^5^3^*^1^8$

$T - 100 = (-80)e^-0.0^2^3^0^7^1^0^4^0^5^3^*^1^8$

$T - 100= -52.8125$

$T = 100 - 52.8125$

T = 47.1875°C

Temperature of the ball after 18 seconds in boiling water is 47.1875°C

5 0

3 years ago

What is the expression for 40 more than twice the quotient of two amounts

svp [43]

Answer:

2(x/y)+40

Step-by-step explanation:

2(x/y)+40

5 0

3 years ago

3. Are the points on the line part of the solution set or not?

Harrizon [31]

Answer:

<h3>a. Yes, they are part of the solution</h3>

7 0

3 years ago

95% as a fraction in its simplest form

Harlamova29_29 [7]

<span> <span>To convert percentage to fraction..
95% = 95/100

divide by 5..
= 19/20

Thats the lowest fraction you can get.</span></span><span>
</span>

6 0

3 years ago

please i will mark brainliest. no spam answers i will report

Vikentia [17]

Answer:

The height is 5.

Step-by-step explanation:

35 divided by 7 is 5

5 0

3 years ago

Read 2 more answers