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3 years ago

I need help no one helps me never

Mathematics

1 answer:

emmainna [20.7K]3 years ago

8 0

Answer:

Step-by-step explanation:

they all equal the same thing

hope this helps :)

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When f(x) =-3 what is x?

katrin [286]

Answer:

D or -1

Step-by-step explanation:

It says that f(x) is equal to -3.

f(x) is the same as y-values, and x is the same as the x-values on a coordinate grid because x is the independent variable, meaning y is the dependent variable, where f(x) depends on the value of x to find y.

So if y is -3, it can be found on the graph on the 4th line, so x = -1 when y = -3

7 0

2 years ago

Read 2 more answers

A pot of boiling soup with an internal temperature of 100° Fahrenheit was taken off the stove to cool in a 65°F room. After fift

s344n2d4d5 [400]

86.34 minutes was used to cool the soup to 80 °F

<h3></h3><h3>How can we calculate this using Newton's Law of Cooling?</h3>

Newton's Law of Cooling can be computed as :

$T=T1+(T0- T1) e^{kt}$

The initial temperature is been represent by T0 which is ( 100 F)

The temperature of surrounding is been given as (69 F)

The final temperature is been given as T

t = time

we were told that the temperature of the soup move to 95 F, using 15 minutes.

Hence, T = 95 F

t = 15 min

Then we can input the values into the above equation as :

$95= 69 + (100-69)e^{15k}$

if we simplify this , we have

$26= 31e^{15k}$

Then $e^{15k} =0.8387$

Then we can find the value of k as :

k= -0.012

Then we have the new equation as

$T= 69 + (100-69)e^{-0.012t}$

$T= 69 + 31e^{15k}$

Then at T=80F

we have,

$80= 69 + 31e^{15k}$

t=86.34

Then if we simplify , we have t=86.34 which implies that 86.34 minutes was used to cool the soup to 80 °F

Learn more about Newton's Law of Cooling at:

brainly.com/question/17051432

#SPJ1

8 0

1 year ago

Which algebraic expression is equivalent to the expression below?

fredd [130]

Answer:

it is equivalent to the expression

3 0

1 year ago

What is 0.66666666666 as a fraction

stellarik [79]

To turn $0.(6)=0.6666...$ into a fraction you should do such steps:

1 step. Set up an equation by representing the repeating decimal with a variable. Using your example, you will let x represent the repeating decimal 0.(6), so you have x=0.666... .

2 step. Identify how many digits are in the repeating pattern, or n digits. Multiply both sides of the equation from Step 1 by $10^n$ to create a new equation. Again, using your example, you see that the repeating pattern consists of just one digit: 6. Now multiply both sides of the equation by $10^1 = 10$ . Thus, you have $10x = 10 \cdot 0.666...$ or $10x = 6.666....$ .

3 step. Subtract the equation in Step 1 from the equation in Step 2. Notice that when we subtract these equations, our repeating pattern drops off. Therefore, $10x-x=6.666...-0.666...\\ 9x=6$ .

4 step. You now have an equation that you can solve for x and simplify as much as possible, using x as a fraction: $9x = 6$ . If you divide both sides by 9, you get $x=\dfrac{6}{9}$ . When simplified, you get that $x=\dfrac{2}{3}$ .