All categories

3 years ago

Please Help!! Urgent ( Zoom in to see it better)

Mathematics

1 answer:

ruslelena [56]3 years ago

8 0

1. You are trying to isolate "F" in the equation

$C=\frac{5}{9}(F-32)$ Multiply 9/5 on both sides

$(\frac{9}{5})C=(\frac{9}{5}) \frac{5}{9} (F-32)$

$\frac{9}{5}C=F-32$ Add 32 on both sides

$\frac{9}{5}C+32=F-32+32$

$\frac{9}{5}C+32=F$

THIS IS WRONG

2. You are trying to isolate "y" in the equation

$m=\frac{x+y+z}{3}$ Multiply 3 on both sides

3m = x + y + z Subtract x and z on both sides

3m - x - z = y

THIS IS CORRECT

3. Isolate "r"

$s=\frac{r}{r-1}$ Multiply (r - 1) on both sides

s(r - 1) = r Distribute s into (r - 1)

sr - s = r Subtract sr on both sides

-s = r - sr Factor out r from (r - sr)

-s = r(1 - s) Divide (1 - s) on both sides

$\frac{-s}{1-s}=r$

THIS IS WRONG

4. Isolate "b"

$A=\frac{1}{2}(a+b)$ Multiply 2 on both sides

2A = a + b Subtract a on both sides

2A - a = b

THIS IS CORRECT

5. Isolate "y"

$m=\frac{x+y}{2}$ Multiply 2 on both sides

2m = x + y Subtract x on both sides

2m - x = y

THIS IS WRONG

The 2nd and 4th one is right

You might be interested in

If hugo goes out for dinner and pays 2$ of sales tax on a 20$ meal what percentage is the sales tax in his city?

vesna_86 [32]

<h3>Answer: 10%</h3>

Work Shown:

2/20 = 0.10 = 10%

Note that 10% of 20 = 0.10*20 = 2 dollars is the sales tax to help confirm the answer.

8 0

2 years ago

Is 0.069 less than 0.07

Nuetrik [128]

Yes, 0.069 is less than 0.07~

First, we compare the "one" place: 0 = 0.

Second, we compare the "tenth" place: 0 = 0.

Next, we compare the "hundredth" place: 6 < 7.

Because 6 < 7, 0.069 < 0.07 as a result~

6 0

3 years ago

There are 4 consecutive odd integers that sum to 120.

allsm [11]

Answer:

27, 29, 31, 33

Step-by-step explanation:

Let x represent the smallest odd integer then...

x+2 represents the second

x+4 represents the third

x+6 represents the fourth

We can use this to set up an equation:

x+x+2+x+4+x+6=120

Combine like terms

4x+12=120

Subtract 12 from both sides

4x=108

Divide both sides by 2

x=27

The integers are 27, 29, 31, 33

4 0

2 years ago

A person wishes to mix coffee worth nine dollars per pound with coffee worth three dollars per pound to get 240 pounds of a mixt

Anastasy [175]

$\bf \begin{array}{lccclll}
&amount&price&priced\ amount\\
&-----&-----&--------\\
\textit{9 bucks/lb}&x&9&9x\\
\textit{3 bucks/lb}&y&3&3y\\
-----&-----&-----&-------\\
mixture&240&5&1200
\end{array}
\\\\\\
\begin{cases}
x+y=240\implies \boxed{y}=240-x\\
9x+3y=1200\\
----------\\
9x+3\left( \boxed{240-x} \right)=1200
\end{cases}$

solve for "x".

what about "y"? well, y = 240 - x

4 0

3 years ago

What are the possible numbers of positive, negative, and complex zeros of f(x) = −3x4 −

Anna007 [38]

Answer:

Step-by-step explanation:

We have to look at sign changes in f(x) to determine the possible positive real roots.

$f(x)=-3x^4-5x^3-x^2-8x+4$

There is only one sign change here, between the -8x and the +4. So that means there is only 1 possible real positive root.

Now we have to look at sign changes in f(-x) to determine the possible negative real roots.

$f(-x)=-3x^4+5x^3-x^2+8x+4$

There are 3 sign changes here. That means there are either 3 negative roots or 3-2 = 1 negative root. So we have:

1 positive

3 or 1 negative

We need to pair them up now with all the possible combinations.

If we have 1 positive and 1 negative, we have to have 2 imaginary

If we have 1 positive and 3 negative, we have to have 0 imaginary

Keep in mind that the total number or roots--positive, negative, imaginary--have to add up to equal the degree of the polynomial. This is a 4th degree polynomial, so we will have 4 roots.

7 0

2 years ago