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3 years ago

Can anyone help me please thank you

Mathematics

2 answers:

irina1246 [14]3 years ago

7 0

The answer is the first option because when you multiply the first equation by 2, you can cancel the x’s because when -2+2 is added it equals 0

andreev551 [17]3 years ago

6 0

Answer:

The first option

Step-by-step explanation:

Because when you multiply the first equation by 2, it sets the -x to -2x which helps cancel the variable out allowing you to easily solve the system of equations.

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The cylinder below has a volume of 536.94 cubic inches. What is the radius of the cylinder? (Use 3.14 for π.)

Anestetic [448]

We have been given volume of the cylinder which is 536.94 cubic inches. Now question says to find the radius of the cylinder.

Then we need to use formula of volume of cylinder which is given by :

$Volume = \pi r^2 h$

We see that there are three unknown values in the formula: {volume, radius-r, height-h}

So to find any one of them we must know other two values.

Volume is given but height is missing. So just for explanation i'm going to use height of the cylinder h= 19 inches

Now plug the value of volume and height in above formula

$536.94 = \pi r^2 *19$

$536.94 = 3.14 r^2 *19$

$536.94 = 59.66r^2$

$\frac{536.94}{59.66} =r^2$

$9=r^2$

take square root of both sides

3=r

Hence radius of the cylinder is 3 inches.

3 0

3 years ago

7. If (0.2)x = 2 and log 2 = 0.3010, then the value of x to the nearest tenth is?

prisoha [69]

(0.2)x = 2.

Taking log on both sides

log (0.2)x = log 2.

x log (0.2) = 0.3010, [since log 2 = 0.3010].

x log (2/10) = 0.3010.

x [log 2 - log 10] = 0.3010.

x [log 2 - 1] = 0.3010,[since log 10=1].

x[-0.699] = 0.3010.

x= 0.3010/-0.699.

x= = -0.4306….

x= = -0.4.

7 0

2 years ago

Read 2 more answers

Suppose you work for a large coffee distributor that has a secret coffee blend it sells to local stores. You mix the House blend

TiliK225 [7]

The ratio House blend/Organic Free Trade blend is the same and must remain the same.

So, the proportion is:

$\frac{140}{168}=\frac{130}{x}$

Where x is the unknown amount of the Organic Free Trade blend.

So, from the proportion, we have:

$\begin{gathered} 140\cdot x=168\cdot130 \\ 140x=21840 \\ \frac{140x}{140}=\frac{21840}{140} \\ x=156 \end{gathered}$

Answer: 156 pounds of Organic Free Trade blend

6 0

1 year ago

What’s the correct answer for this question?

Serga [27]

Answer:

Step-by-step explanation:

In the attached file

8 0

4 years ago

F(x)=4x+7. Find the inverse of f(x).

liraira [26]

Answer:

Step-by-step explanation:

f(x) = y = 4x + 7

Solve for "x"

4x + 7 = y ⇒ x = $\frac{1}{4}$ y - $\frac{7}{4}$

Exchange the places "x" and "y"

$f^{-1}$ (x) = $\frac{1}{4}$ x - $\frac{7}{4}$

or $f^{-1}$ (x) = $\frac{x-7}{4}$

8 0

3 years ago